Choose from our selection of M3 screws, including socket head screws, rounded head screws, and more. Same and Next Day Delivery.

Jan 29, 2021 · I noticed that in some (many?) countries, screw sizes are listed as "M+number", e.g. M3, M4, M5 and so on. What does this size designation mean?

Choose from our selection of screw size identifiers, screw, bolt, and nut size identifiers, reference charts, and more. Same and Next Day Delivery.

Choose from our selection of M3 socket head cap screws, including alloy steel socket head screws, 18-8 stainless steel socket head screws, and more. Same and Next Day Delivery.

Choose from our selection of metric sheet metal screws, including rounded head screws, flat head screws, and more. Same and Next Day Delivery.

Choose from our selection of M3 shoulder bolts, including alloy steel shoulder screws, metric alloy steel shoulder screws, and more. Same and Next Day Delivery.

Choose from our selection of metric button head screws, including over 1,200 products in a wide range of styles and sizes. Same and Next Day Delivery.

Choose from our selection of M3 washers, including washers, lock washers, and more. Same and Next Day Delivery.

Choose from our selection of M3 nuts, including hex nuts, locknuts, and more. Same and Next Day Delivery.

Choose from our selection of M3 set screws, including cup-point set screws, nonmarring set screws, and more. Same and Next Day Delivery.