![terminology - What do the numbers in screw sizes M3, M4 etc. mean? - Home Improvement Stack Exchange terminology - What do the numbers in screw sizes M3, M4 etc. mean? - Home Improvement Stack Exchange](https://i.stack.imgur.com/oVr5u.jpg)
terminology - What do the numbers in screw sizes M3, M4 etc. mean? - Home Improvement Stack Exchange
![M3 M4 M5 M6 M8 M10 Black Nylon Hex Bolts / Plastic Screws/ Hexagon Nylon Screw Plastic Insulated Bolt | Fruugo NO M3 M4 M5 M6 M8 M10 Black Nylon Hex Bolts / Plastic Screws/ Hexagon Nylon Screw Plastic Insulated Bolt | Fruugo NO](https://img.fruugo.com/product/3/90/843973903_max.jpg)
M3 M4 M5 M6 M8 M10 Black Nylon Hex Bolts / Plastic Screws/ Hexagon Nylon Screw Plastic Insulated Bolt | Fruugo NO
![VIGRUE 1225PCS M2 M3 M4 M5 Hex Socket Head Cap Screws Kit, 12.9 Grade Alloy Steel Black - Walmart.com VIGRUE 1225PCS M2 M3 M4 M5 Hex Socket Head Cap Screws Kit, 12.9 Grade Alloy Steel Black - Walmart.com](https://i5.walmartimages.com/asr/81f4cb0b-7084-4960-beb7-64a13e334639.d4dc92952946839028a5a768c0fcbe5e.png)
VIGRUE 1225PCS M2 M3 M4 M5 Hex Socket Head Cap Screws Kit, 12.9 Grade Alloy Steel Black - Walmart.com
![Chicago Screws Stainless Steel M3 M4 M5 M6 Chicago Screw Black for Leather - China Screws, Chicago Screws | Made-in-China.com Chicago Screws Stainless Steel M3 M4 M5 M6 Chicago Screw Black for Leather - China Screws, Chicago Screws | Made-in-China.com](https://image.made-in-china.com/2f0j00nHGkvyFCQjbL/Chicago-Screws-Stainless-Steel-M3-M4-M5-M6-Chicago-Screw-Black-for-Leather.webp)
Chicago Screws Stainless Steel M3 M4 M5 M6 Chicago Screw Black for Leather - China Screws, Chicago Screws | Made-in-China.com
![NINDEJIN 666pcs Set Screws, M2 M3 M4 M5 M6 M8 Metric Internal Hex Drive Set Screws & Allen Key Wrenches Assortment Kit, 12.9 Carbon Steel Socket Set Screws for Faucet, Bathroom Fixtures, NINDEJIN 666pcs Set Screws, M2 M3 M4 M5 M6 M8 Metric Internal Hex Drive Set Screws & Allen Key Wrenches Assortment Kit, 12.9 Carbon Steel Socket Set Screws for Faucet, Bathroom Fixtures,](https://i5.walmartimages.com/seo/NINDEJIN-666pcs-Set-Screws-M2-M3-M4-M5-M6-M8-Metric-Internal-Hex-Drive-Screws-Allen-Key-Wrenches-Assortment-Kit-12-9-Carbon-Steel-Socket-Faucet-Bathr_e6bdb08b-8aed-4278-b610-7492f3683534.4f2e28d575066ab5fd2e180b79a70228.jpeg?odnHeight=2000&odnWidth=2000&odnBg=FFFFFF)
NINDEJIN 666pcs Set Screws, M2 M3 M4 M5 M6 M8 Metric Internal Hex Drive Set Screws & Allen Key Wrenches Assortment Kit, 12.9 Carbon Steel Socket Set Screws for Faucet, Bathroom Fixtures,
![M3 M4 M5 M6 M8 Stainless Steel Hex Drive Flat Head Screw A2 Qty:10,20,50,100pcs – ASA College: Florida M3 M4 M5 M6 M8 Stainless Steel Hex Drive Flat Head Screw A2 Qty:10,20,50,100pcs – ASA College: Florida](https://i.ebayimg.com/images/g/1pgAAOSwwvNfBifl/s-l1600.jpg)
M3 M4 M5 M6 M8 Stainless Steel Hex Drive Flat Head Screw A2 Qty:10,20,50,100pcs – ASA College: Florida
![Left hand thread screws M3 M4 M5 M6 M8 M10 Grade12.9 DIN912 Left hand thread Hex Socket Head Cap Screw - Price history & Review | AliExpress Seller - Jason Hardware World | Alitools.io Left hand thread screws M3 M4 M5 M6 M8 M10 Grade12.9 DIN912 Left hand thread Hex Socket Head Cap Screw - Price history & Review | AliExpress Seller - Jason Hardware World | Alitools.io](https://alitools.io/en/showcase/image?url=https%3A%2F%2Fae01.alicdn.com%2Fkf%2FH6284012bd22a477eb988ba6760651c1fY.jpg_480x480.jpg)
Left hand thread screws M3 M4 M5 M6 M8 M10 Grade12.9 DIN912 Left hand thread Hex Socket Head Cap Screw - Price history & Review | AliExpress Seller - Jason Hardware World | Alitools.io
![Hex Head M4 M5 M6 M7 M8 DIN 571 Constructure Wood Screws - China Wood Screws, Screw | Made-in-China.com Hex Head M4 M5 M6 M7 M8 DIN 571 Constructure Wood Screws - China Wood Screws, Screw | Made-in-China.com](https://image.made-in-china.com/2f0j00lVRcnfUPaokI/Hex-Head-M4-M5-M6-M7-M8-DIN-571-Constructure-Wood-Screws.webp)
Hex Head M4 M5 M6 M7 M8 DIN 571 Constructure Wood Screws - China Wood Screws, Screw | Made-in-China.com
![Amazon.com: AETTL 660 Piece Machine Screws Assortment Kit, M6 M5 M4 M3 Nuts and Bolts Assortment Kit, Stainless Steel Metric Assorted Machine Screws Set Allen Wrenches Hex Socket Head with Flat Washers : Amazon.com: AETTL 660 Piece Machine Screws Assortment Kit, M6 M5 M4 M3 Nuts and Bolts Assortment Kit, Stainless Steel Metric Assorted Machine Screws Set Allen Wrenches Hex Socket Head with Flat Washers :](https://m.media-amazon.com/images/I/71fC20ZQ1ML.jpg)
Amazon.com: AETTL 660 Piece Machine Screws Assortment Kit, M6 M5 M4 M3 Nuts and Bolts Assortment Kit, Stainless Steel Metric Assorted Machine Screws Set Allen Wrenches Hex Socket Head with Flat Washers :
![Rack Mount Cage Nut Screw Washer Kit M4 M5 M6 M8 Best Supplier On Network China Manufacturer Supplier Rack Mount Cage Nut Screw Washer Kit M4 M5 M6 M8 Best Supplier On Network China Manufacturer Supplier](https://www.smartclima.com/wp-content/uploads/Rack-Mount-Cage-Nut-Screw-Washer-Kit-M4-M5-M6-M8.jpg)
Rack Mount Cage Nut Screw Washer Kit M4 M5 M6 M8 Best Supplier On Network China Manufacturer Supplier
![10pcs M4 M5 M6 Bolt Hex Cross Phillips Hexagon Screws Flat Spring Gasket Washers 304 Stainless Steel L=10-50mm 12/16/20/30/40mm - AliExpress 10pcs M4 M5 M6 Bolt Hex Cross Phillips Hexagon Screws Flat Spring Gasket Washers 304 Stainless Steel L=10-50mm 12/16/20/30/40mm - AliExpress](https://ae01.alicdn.com/kf/S417abb1e4f094710888ff58501b016fe6/10pcs-M4-M5-M6-Bolt-Hex-Cross-Phillips-Hexagon-Screws-Flat-Spring-Gasket-Washers-304-Stainless.jpg)
10pcs M4 M5 M6 Bolt Hex Cross Phillips Hexagon Screws Flat Spring Gasket Washers 304 Stainless Steel L=10-50mm 12/16/20/30/40mm - AliExpress
![Source M3 M4 M5 M6 M8 M10 Stainless Steel 304 Hex Socket Flat Head Sleeve Barrel Nut and bolts on m.alibaba.com Source M3 M4 M5 M6 M8 M10 Stainless Steel 304 Hex Socket Flat Head Sleeve Barrel Nut and bolts on m.alibaba.com](https://s.alicdn.com/@sc04/kf/H9ae6663b938547c3b2d3b8deda4a1c1dt.jpg_720x720q50.jpg)
Source M3 M4 M5 M6 M8 M10 Stainless Steel 304 Hex Socket Flat Head Sleeve Barrel Nut and bolts on m.alibaba.com
![Amazon.com: VIGRUE 520Pcs 304 M3 M4 M5 M6 Stainless Steel Bolts Nuts Washers Kit, Hex Socket Head Cap Screws Assortment Set Kit with Storage Box (520 Pcs Hex Button Head Cap Screws Amazon.com: VIGRUE 520Pcs 304 M3 M4 M5 M6 Stainless Steel Bolts Nuts Washers Kit, Hex Socket Head Cap Screws Assortment Set Kit with Storage Box (520 Pcs Hex Button Head Cap Screws](https://m.media-amazon.com/images/I/71kK1jbqiRL.jpg)
Amazon.com: VIGRUE 520Pcs 304 M3 M4 M5 M6 Stainless Steel Bolts Nuts Washers Kit, Hex Socket Head Cap Screws Assortment Set Kit with Storage Box (520 Pcs Hex Button Head Cap Screws
![Amazon.com: QJKW Screw 2pcs M3 M4 M5 M6 M8 M10 M12 M20 Stainless Steel Conversion Screw Slotted Big and Small reducing Screws Transition Joint Bolts Robust and Easy to use (Size : Amazon.com: QJKW Screw 2pcs M3 M4 M5 M6 M8 M10 M12 M20 Stainless Steel Conversion Screw Slotted Big and Small reducing Screws Transition Joint Bolts Robust and Easy to use (Size :](https://m.media-amazon.com/images/I/71ZK28kjKJL.jpg)