Purchase 4040 Aluminum Frames Slot Width 8 from MISUMI, Factory Automation parts, Die & Mold parts, industrial tools and consumables. / 3D. 8mm ; Hole size: Φ8. 4PCS T Slot 4040 Aluminum Extrusion Profile 23. 2020 or 2040 Aluminum Extrusion in BLACK. there is 3030 but the price is prob more than 4040. 6inch). 24 per length. The first thing to do is to machine a round-shaped die. 👍40 series 4040 aluminum extrusion profile T-slot made of 6063-T5 material, smooth surface, strong structure and long service life. Lightweight type is widely used in frame combinations that require less demanding structures, as well as in special fields such as automotive, factory. Length L (mm)4040 Series aluminum extrusion profile 5 hole L shape joint plates widely used for build industrial aluminum frame structures, 3D printers, CNC routers, CNC laser cutters and robotics projects etc. 94 x 1. Width: 40mm, Height: 40mm. zip Learn more about the formats. 2040 V Groove. Shop 40x40 Aluminum Extrusion - 8 Series, Base 40 from MISUMI. 30. MISUMI USA has all of your Aluminum Extrusions needs covered, with over 3. 20-4040 40mm x 40mm T-slotted Aluminum Extrusion . Choose Options. Unfortunately, Autodesk expires this every 30 days. A6N01SS-T5 Aluminum Alloy. M8. 01 x 1. Choose from our selection of 80/20-compatible fasteners, including T-slotted framing fasteners, T-slotted framing structural brackets, and more. Edward Ubelhor. 45mm X 45mm T-Slotted Profile - Four Open T-Slots. HFSTB8-4040: 50~4000: 1. E30-3030-C – 30mm x 30mm T-SLOT ALUMINUM EXTRUSION. 8 slot aluminum extrusion for 3D printers and CNCs. 👍 Great DIY ：4040 aluminum extruded is a great framing material that offers endless architectural possibilities for your ideas, it allows for a. uxcell Sliding T Slot Nuts, M4 Half Round Roll in T-Nut for 4040 Series Aluminum Extrusion Profile, Carbon Steel Nickel-Plated, Pack of 10. Extrusion Size - Width (A) (mm) 40. 02). The specifications and dimensions of some parts may not be fully covered. 4x10 4: 10. I've also added the 21 brackets for 2020 and for the short side of the 2040 profile as . $11. 4040 Aluminum Extrusion Connector Bracket Set Included 8PCS Joint Plates,40Pcs M8 T-Slot Nuts and 40Pcs M8x16mm Hex Socket Cap Screw for 4040 Series Aluminum Profile 3D Printer Frame in Brackets. You can find 4040 extrusions in UMMD with 300x300 printable area which seems enough. Manufactured by KJN Aluminium profiles. 0 out of 5 stars 4. We know TSLOTS, and we can help you learn which aluminum extrusion products are right for the design you want. MISUMI USA has all of your Frame Caps for Aluminum Extrusions needs covered, with over 3. MISUMI USA has all of your Frame Caps for Aluminum Extrusions needs covered, with over 3. 57 inches 4040 aluminum extrusion connector for T Slot Rail 10mm T/V Slot 40mm series aluminum profile rail accessories. 99 90 Degree Aluminum Extrusion: This 4040 angle corner connector can be used to connect 40mm aluminum extrusion parts at a 90 degree angle, suitable for metric 4040 or 4080 series aluminum extrusion profile rail. 2020 refers to 20mm x 20mm square T-slot Aluminum Extrusion. Black/Silver 4040 V-slot Aluminum Profile Extrusion 100mm-1500mm or custom length. However, many people are adopting t-slot aluminum extrusion for use in a wide variety of projects. MISUMI offers free shipping, free CAD downloads, short lead times, competitive pricing, and no minimum order quantity. r/3Dprinting. 4PCS T Slot 4040 Aluminum Extrusion Profile 23. Join the GrabCAD Community today to gain access and download!This item: 6Pcs 4040 Corner Bracket Joint Plate L Shape 5 Hole Aluminum Extrusion Connector with 30Pcs T-Nuts, 30Pcs Screws and 1Pcs Wrench for 4040 Series Aluminum Extrusion Profile $32. Reset. 95. Product Notes: Please check the product specification for the part number KHFS8-4040-4000 on the 40x40 Aluminum Extrusion - 8 Series, Base 40. 2020 V Groove. View Product. C-Beam® Linear Actuator Bundle. Create automatic connections using intelligent macros. 5 Series - Aluminum Frames 20, 25, 40 Square. Extrusion Size - Thickness (T) (mm) 40. Here's a 3D view of the printer. Wellste is able to supply aluminum profile accessories. The center hole is sized for a 5/16-18 tap and the slot width fits 5/16" carriage bolts. All available profiles come in clear anodized, and common profiles such as 4040, 4080, and 8080 also have black. Aluminum Extrusion Profile - 40-4040 X 2000 MM quantity. Also, Wellste 2020 aluminum extrusion has a dimension of 20mm x 20mm. Pre-threaded holes and center recess allows for flush mounting a top plate. 18 x 1. Polyamide. 8020: With its larger cross. The KHFS5-4040-4000 is included in our offerings for MISUMI Aluminum Extrusions and our full line of MISUMI products. Decorations, Robot Frame, workstations, Building, Industrial, Machinery, Automation parts, CNC, etc. Basically the 2. Also known as: Aluminium Extrusion; Aluminium Profiles, Aluminium Struts. 2. MISUMI. Package Dimensions : 40 x. one on each 40mm face. 40 Series 40-4040 Profile T-Slotted Extrusions. Drawing and STL file that provides the dimensions for a 4040 Aluminum Extrusion ** HISTORY ** 2021-12-27: update main drawing to make dimensions less cluttered 2021-11-13: cleaner drawing plus added sample models that fit well. We established an aluminum fabrication factory in 2007 to provide fabrication and CNC machining services, including precision cutting to length, hole-punching, CNC milling, bending, welding, laser etching, laser cutting, deburring, secondary finishing for aluminum products. $5. MISUMI USA has all of your Aluminum Extrusions needs covered, with over 3. Please see the size pictures. $23. 40x40 Aluminum Extrusion - 5 Series, Base 20. Product Notes: Please check the product specification for the part number KHFSF8-4040-4000 on the 40x40 Aluminum Extrusion - 8 Series, Base 40, One Closed Side. Some have even built their own machines such as 3D Printers and CNC machines using our aluminum. The following is different from normal Europe standard 2020 aluminum extrusion profile and the 2020 V-slot, we ship randomly. size: 6mm,8mm,10mm: MOQ: Low MOQ: OEM & ODM: Available. Model: 4040, Size: 1-1000mm x 40 x 40 (L*W*H) Applications: automation equipment, 3D printers, workbenches, CNC structures, assembly lines, home furnishing, stage design, etc. Depending on the requirements, 15 Series accessories can be transitioned to a 10 Series. Size: 4040 Series: 4040B Bracket: 4040 L Type: 4040 T Type: 4040: 3060: Compare with similar items. For applications which request smaller deflection than in the table, change length (L) shorter or change to a bigger size. 1. The specifications and dimensions of some parts may not be fully. 02m or custom cut. This Product is Discontinued Shop for all Aluminum Extrusions Key Features Length 4 m. All Electronics, Motors & More; Stepper Motors . Type: Sliding nut, suitable for Aluminum Extrusion Profile 4040 series Slot Groove 8mm or 5050 series Slot Groove 8mm ; Material:Made of high quality carbon steel, it has a high hardness, the surface is galvanized for good resistance to rust. Thread Size: M 8: Exterior Finish: Aluminum: Color: Silver: About this item . Product information . Great for machine guards and robot guards. Aluminum extrusions are available in an extremely wide range of shapes and sizes, and extrusion tooling is generally far lower cost than stamping dies. 40-4040-UL 40mm x 40mm Ultra Light T-Slotted Aluminum Extrusion . 88 ENon-ReturnableP. Measuring equipment and instrumentation as well as Other Machinery that are made out of aluminum extrusions. 4PCS T Slot 4040 Aluminum. Here is a comparison of the 10 series and 15 series profile standards: 10 Series: 1" by 1", 1010 increases in size to 2" by 4", 2040. 3D Models. Join the GrabCAD Community today to gain access and download!Shop Aluminum Extrusion Standard Units from MISUMI (Part Numbers). They can be used for Linear Guide mounting. So it is important to remember that target – a tenth of one inch or under. It mainly contains four open T-slots, with one on every 40mm face. Aluminum Extrusions Load Capacity Guideline QLoad Capacity Calculations 1. Section Modulus: Zx: 1. 4'',European Standard Anodized Linear Rail for 3D Printer Parts and CNC DIY 1000mm Black(39. BLCCLOY 20Sets Black 2020 Series Aluminum Profile Connector Set, 20pcs Corner. Wellste 4040 aluminum extrusion belongs to the 40 series slotted aluminum extrusion family. Besides that, all extrusion manufacturers (8020 sells extrusions made in China like everyone else) all have a bunch of different wall thicknesses for different structural purposes. us. 90. Extrusion Size - Width (A) (mm) 40. Dimensions and sizes can be very confusing, even on the popular Ender 3s. 80 series t-slot profiles include 8080, 80120. The structures can be expanded or reconfigured as a facility's needs change. Flatness. 6'',European Standard Anodized Linear Rail for 3D Printer Parts and CNC DIY 600mm Silver(23. BUILDING WITH THE T-SLOTTED ALUMINUM EXTRUSION FRAMEWORK. As such, critical dimensions with tolerances must be identiied before the extrusion stage. To further explain its features, Wellste 2040 aluminum extrusion is light in weight. Medium/Heavy Structure Frame 44L Frame. Aluminum Extrusion w/ Milled Surfaces - 20×20mm, 25×25mm, 40×40mm. Publication date. Days to Ship : 5 Days. 4040 Aluminum Extrusion; 4080 Aluminum Extrusion Profile; Oval Aluminum Extrusions;. 274I would go with 4040 extrusions, maybe if the walls are structural assisting. 2040 1 Meter a piece 1Kg and price is 5. Aluminum extrusions feature a standard X. 20-4040 is a 40mm x 40mm metric 20 series square T-slot profile with eight open T-slots, two on each 40mm face. When Will gets the call, Xtrudor arrives — fully equipped and ready to stock. 95. 57 inches: Color: Clear: Shape: Square: About this item . Made of high-quality aluminium and featuring four 10mm slots, it provides ample space for attaching accessories and creating custom structures. 99 Length: Required 250mm 500mm 1000mm 1500mm 2000mm V-Slot Color: Required Sleek Silver Industrial Black Quantity: Description V. 2020 1 Meter a piece 0. 5. Set the foundation for your next project with our cut to size 40×40 aluminium extrusion from 40 – 3000mm. Wellste offers other dimensions. The 4040 Aluminum Extrusion Cap Replacement for the Creality Ender 3/Ender 3 Pro (V1) is intended for those who have removed their LCD mount from the original location of the printer, leaving the 4040 aluminum extrusion bare. High-strength European standard aluminum, the surface is anodized, corrosion-resistant, high-strength, beautiful and fashionable. 4PCS V Slot 4040 Aluminum Extrusion Profile 27. 15 x 1. The Ender-3 uses a mix-and-match of various sizes: 2020 aluminum extrusion (20mm X 20mm) 2040 aluminum extrusion (20mm X 40mm) 4040 aluminum extrusion (40mm X 40mm) On my Ender 3 Pro, the exact part sizes are: Ender Extender XL ($99) – Height Upgrade. 88 ENon-ReturnableP. Tag: 4040 ×. HONJIE 10 Pcs 4040 Inside Corner Bracket Gusset for 4040 Aluminum Extrusion Profile 40x40x35mm with Slot 8mm,Black Tone. 25 de gree and total twist over 20. Color (Required): Length: Required 300 mm 400 mm 500 mm 600 mm 900 mm 1000 mm 1200 mm 2000 mm. 91 per inch + $2. Next comes the cooling process. Buy 4040 Aluminum Extrusion Connector Bracket Set Included 8PCS Joint Plates,1Pcs M5 Wrench,40Pcs M8 T-Slot Nuts and 40Pcs M8x16mm Screws for 4040 Aluminum Profile 3D Printer Frame. 6inch)The 15 series aluminum extrusion ranged from 1. Thanks to the huge selection of aluminium system profiles, you always. HFSMGQ8-4040-R140-LCH: HFSMGQ8-4040-R140-LCP: HFSMGQ8-4040-R140-LCV: HFSMGQ8-4040-R140-LDH:. Rapid Design; PDF P. HFS. The t-slot extrusions are modular, and extending them through accessories that fit into the t. Length: 6. This item: Tsnamay 4Pcs 4040 Inside Corner Bracket Gusset Triangle Hypotenuse Consolidate for 4040 Aluminum Extrusion Profile with Slot. Extrusion Size - Thickness (T) (mm) 40. Aluminum Frames (Extrusion Size:40x40) for industrial applications. Shop 40x40 Aluminum Extrusion - 8 Series, Base 40 from MISUMI. Extrusion No. mk's Series 40 t-slot aluminum extrusion is the most flexible and versatile framing system available. Aluminum Extrusion Custom Cut Service. 75/Item) Get it as soon as Tuesday, Aug 8MISUMI USA has all of your Aluminum Extrusion Structural Units needs covered, with over 3. 3030 T Slot. 45-4545-Black-FB. 73 inches : Country of Origin China : Item model number ZE029 : Color Black and Silver :This Parco aluminum extrusion is 100% compatible with the following: 80/20 extrusion #40-4080, and T-SLOTS #650036. Size: 4040 T Type: 4040: 135 Degree Black: 4040 L Type: 4040 T Type: for 2020 Series C: Compare with similar items. Odinest 3030 Series M5 T Slot Nuts Roll-in Spring Ball Loaded Elastic Nuts 12 Pack Carbon Steel for 3030 Series Aluminum Extrusion Profile Rail with 8mm Slot for 3D Printer. 99. Manufacturer OTTFF : Item Weight 15. 40 Series: The 40 series is a metric t-slot profile based on 40mm dimensions with the 4040 being the standard square profile with a t-slot grooved into. Automatic generation of parts lists. Product Dimensions 6. 81 $ 756. Some popular applications include machine guarding, CNC framing, robotics, 3D printing, work benches, displays, and much more. 37" 2Pcs (Kwweeoo). In stock and ready to ship. Was wondering if anyone had or knows where the dimensions of the ender 3 pro aluminum Extrusions are? I know they're 2020,2040, & 4040 V-Slots. 61 inches; 14. MISUMI USA has all of your Door Sliders for Aluminum Extrusions needs covered, with over 3. 4PCS T Slot 4040 Aluminum Extrusion Profile 23. 4040-Aluminum-Extrusion thingiverse. 2040 T Slot Aluminum Extrusion Pre-cut lengths 300mm-2000mm. 0305 mm. thingiverse. The load capacities (allowable loads) are defined as: Load that generates a deflection amount 1/1000 of the extrusion length. MISUMI USA has all of your Aluminum Extrusions needs covered, with over 3. Choose. SAE/fractional or metric profiles available in a variety of shapes and finishes. Drawing and STL file that provides the dimensions for a 4040 Aluminum Extrusion ** HISTORY ** 2021-12-27: update main drawing to make dimensions less cluttered 2021-11-13: cleaner drawing plus added sample models that fit well. 8M high quality products and 80 sextillion configurable parts available with fast shipping and low pricing. 5cm Weight: 250g per joint connector, 535g for 4 joint connector Packing list 4 x Pivot JointsSize: 4040(2 Hole) for 2020 Series C: 4040 L Type: Black: 135 Degree Black: for 2020 Series E: Compare with similar items. 2020 refers to 20mm x 20mm square T-slot Aluminum Extrusion. M5. The connectors join. 76 inches : Item model number a22111700ux0145 : Material Aluminium : Item Package Quantity 12 : Mounting TypeThis item: 6Pcs 4040 Corner Bracket Joint Plate T Shape 5 Hole Aluminum Extrusion Connector with 30Pcs T-Nuts, 30Pcs Screws and 1Pcs Wrench for 4040 Series Aluminum Extrusion Profile $34. Specification Material: Zinc alloy Finish: spray painting Product size: 2-3/8" x 1-5/8" x 1-5/8" Hole diameter: Φ8mm Thickness: 5mm Application in 4040 Aluminum Extrusion Profile / 40mm x 40 mm metric profile Package size: 9. 2020RQ profile usually applies to the corner of framework structure, easy to connect and no sharp edges, so it’s safe and beautiful facade. They act as a great framing material as they can hold T-Slot Nuts on all 4 Grooved Surface sides. We can provide the size from 50mm - 4000mm,and 5000mm (i) Caution. $33. Wellste: Your Leading 2040 Aluminum Extrusion Manufacturer and Supplier in China. Before the extrusion process, preheat the die to about 450-500 0 C. Quick view Choose Options. 3. It's better to buy in pieces or Combine Order. Ideally suited for Enclosures, Frameworks, Work Benches, Laboratory Environments, Machine Guarding, Test Rigs & Protective. 40x40mm Black anodized Aluminum profile , perfect solution for custom machine frames, workstations, prototyping, guarding and many more purposes. 44 inch / 1840mm, 2Pcs. In stock and ready to ship. We have a collaboration with our sales, engineers, and customers in order to provide the right. . Product Notes: Please check the product specification for the part number KHFSL8-4040-4000 on the 40x40 Aluminum Extrusion - 8 Series, Base 40. 95. C-Beam Gantry Plate. Easy-to-Form Pure 1000 SeriesAluminum Sheets and Bars. 4040 Aluminum Extrusion Profile | 3D CAD Model Library | GrabCAD. Recent All time. 5x1. Package size: 21 x 7 x 6 cm Weight: 55g per connector, 460g for 8 pcs connectors Packing list 8 x Aluminum extrusion profile foot end connector. DIMENSIONS ; Cabinet Hinges 4040 Metal Hinges for 4040 Aluminum Extrusion Profiles Or 40 Series Aluminum Extrusion Profiles - (Type: Silver Color). Smooth surface. With the help of the Robotunits fastener and the unique 14mm standard t-slot, all extrusions. 8USD. The center of the t-slot always measures . Maximum Weight Loads for 36″ Long 80/20 T-Slot Aluminum Bars. Item Dimensions LxWxH: 36. 91 x 1. (!) Due to Microsoft's end of support for Internet Explorer 11 on 15/06/2022, this site does not support the recommended environment. E40-4040-C – 40 SERIES 40mm x 40mm T-SLOT ALUMINUM EXTRUSION. 40x40 profiles are ideal for building heavy-duty fabricated structures for material handling. 007200Ex VAT: £ 0. Extrusion Size - Width (A) (mm) Extrusion Size - Thickness (T) (mm) Length. Wholesale standard size t slot 40x40 aluminium extrusion profile with t slots $2. [ ! ] 8L-4040 is a Standard Unit using HFSL8-4040 extrusions. 5"). , 40-4040-Black, 40 Series 40mm x 40mm x 915mm. 5”x 1. Alternate profiles of the same shape are available for light and heavy applications as needed. ZYLtech 2080 T-slot Aluminum Extrusion Pre-cut length 1000mm. 8mm to 8. June 13th, 2022. 99 $ 11. 0. 2020 T-Slot Aluminum Extrusion. 4040 Black T Slot Aluminum Profile Extrusion. Clear anodized finish. Related Information. 40-4080 is a 40mm x 80mm metric 40 series rectangular T-slot profile with six open T-slots, two on each 80mm face and one on each 40mm face. Slot 8 4040 Aluminium Extrusion, Lightweight, 4 open slots. add to list Tags. 99. 1200mm. T-slot Nuts can be inserted into the aluminium profile groove. 5 Pounds; Item model number. 4040 Aluminum Extrusion; 4545 Aluminum Extrusion; 5050 Aluminum Extrusion; 6060 Aluminum Extrusion; 4080 Aluminum Extrusion; 8080 Aluminum Extrusion;. 5” to 3”x 6”. C-Beam Shield. 99. This item: 80/20 Inc. This profile is the most heavy-duty in the 1515 profile family and lends itself to. The fraction includes the 10 series (1" by 1") and the 15 Series (1. With the included 10pcs 4040 4080 series aluminum extrusion connectors, 20pcs screws, 20pcs T-sliding nuts, 1pc hex wrench, it's incredibly easy to assemble and use 【Versatile Compatibility】With a size of 39x39x35mm (1. Dial 1. LW 2040 aluminum extrusion is a T-shaped aluminum profile that belongs to the t-slot series and is also. 80/20 offers a wide variety of fractional and metric profiles. Set the foundation for your next project with our cut to size 20×20 aluminium extrusion from 40 – 3000mm. 2mm, Hole spacing (on center): 40mm (1⅝ inches). Depending on the force used, different shapes and sizes are produced, like 2020 aluminum extrusion dimensions. CAD: 2D. 4x10 4: HFS: A6N01SS-T5 Aluminum Alloy: Black. MISUMI USA has all of your Aluminum Extrusions needs covered, with over 3. 8M high quality products and 80 sextillion configurable parts available with fast shipping and low pricing. Usually, the brackets only constrain the extrusions in two dimensions, so you’ll want to use a second method to overconstrain the joint. 4inch). 4 inches), this connector set is suitable for most 40x40 and 40x80 profiles, allowing for seamless integration with. Extrusion Size - Thickness (T) (mm) 40. We deal in 4040 T Slot Aluminium ProfileTrivalent Chromate. Aluminum Extrusion w/ Milled Surfaces - 20×20mm, 25×25mm, 40×40mm. We have four basic series of t-slot aluminum extrusion: 25 series, based off a 25 x 25 mm square; 40 series, based off a 40 x 40 mm square; 50 series, based off a 50 x 50 mm squarefollow three standard groove dimensions - 6mm, 8mm, 10mm. 5 mm, Thickness: 2mm. A. These included 40x40mm, 40x80mm, 40x120mm and even 40x160mm. Choose Options. Tags 4040 Aluminum Extrusion Dimensions , Download: free Website: Printables. 5 inches; 12. Size: 3 x 1-3/4 inch (78 x 44 mm), Pin diameter: 14. MISUMI USA has all of your Aluminum Extrusions needs covered, with over 3. HFS8-4040 and bent formed HFS8-4040 aluminum extrusions. $0. $1. Coming from its name, Wellste 2040 aluminum extrusion has a dimension of 20mm x. Also known as: Aluminium Extrusion; Aluminium Profiles, Aluminium Struts. 40mm x 40mm aluminum extrusion profile in STEP format. step. Product Dimensions 1. Profiles for 2020, 2040 and 4040 aluminum extrusion for modelling purposes. $11. 50” fractional 15 series square T-slot profile with four open T-slots, one on each 1. The specifications and dimensions of some parts may not be fully covered. It mainly contains four open T-slots, with one on every 40mm face. Item requires special delivery charges. 2040 1 Meter a piece 1Kg and price is 5. 5'' European Standard Anodized Linear Rail for 3D Printer Parts and CNC DIY 700mm Silver(27. MISUMI USA has all of your Aluminum Extrusions needs covered, with over 3. Extrusion Size - Width (A) (mm) 20. Purchase Aluminum Frames (Extrusion Size:40x40) now. MISUMI. 8 mm. None. 40x40 Aluminum Extrusion - 8 Series, Base 40, One. The hinge is comprised of two parts: "1" and "2". 4040 Aluminum Extrusion Profile - STEP. Wellste can deliver stocked t-slot profiles at quite a reasonable price in just 3-5 working days. Plate Brackets - 6 Series. 20Sets 4040 Aluminum Extrusion Connectors 40 Series Extrusion Corner Piece with 20PCS 4040 Series Aluminum Extrusion Profiles T Slot L Bracket 40PCS Screws 4040 T Nut: Amazon. 5m Gray - ThingiBOX. M6 Series, Flat Bracket, ABJF (Groove Width 30 mm) Block Brackets - 5 Series. M3, M4, M5, M6 and M8 screws can be used depending on which T-slot Nut you choose. 2020RQ profile usually matches with M6 bolt and nut, its bearing. Drawing and STL file that provides the dimensions for a 4040 Aluminum Extrusion ** HISTORY ** 2021-12-27: update main drawing to make dimensions less cluttered 2021-11-13: cleaner drawing plus added sample models that fit well. 48Kg and price is 3. 015. US$ 1. The 20-2040 profile is compatible with 20 series. 34. Spring and spring-tab. 4x10 4: 10. For aluminum extrusions, there are practical limits; some designs prove very challenging. Harnessing his new-found superpowers, Will created Extrude-A-Trim in 1962. 99 $ 126 . Quantity Item # 40-4040 X 2000 MM: ph_ups_invoice_desc: Size: 40mm x 40mm x 2,000mm: Weight (lbs) 10. 99 In Stock. EN. 20 series T-slotted aluminum extrusion with four open T-slots, they have 2020, 2040, 2060,2080 aluminum extrusion. 5 mm. 800mm.