M4 Screws – Socket Cap, Button, Pan (Phillips), Flat (Phillips), Set, Nuts & Washers

A collection page of Monster Bolts

category
Visit store
Products
46
Active ads
0
Depth
—
Published
2025/10/14

About

Home › Metric Fasteners › M3 Screws The M3 metric screw (3 mm nominal diameter) is a staple for electronics, robotics, 3D printers, and compact assemblies. This hub consolidates core M3 options— Socket Cap , Button , Phillips Pan , Phillips Flat , and Set Screws — with quick specs and direct links to matching M3 nuts, washers, and metric hex keys. Shop by M3 Head Type M3 Socket Head Cap Screws DIN 912 / ISO 4762 • High clamp force • Allen/Hex drive M3 Button Head Cap Screws ISO 7380 • Low profile dome head • Allen/Hex drive M3 Phillips Pan Machine Screws Machine thread • For tapped holes or nuts M3 Phillips Flat Machine Screws 90° countersink • Flush finish • Machine thread M3 Cup Point Set Screws Grub screws • Allen/Hex drive • Cup point Quick Specs Spec Details Diameter M3 (3.0 mm nominal) Common Pitch 0.5 mm (coarse) Typical Drive Metric hex/Allen (varies by head). Need a key? Hex Key Hub or Individual Metric Keys . Materials & Finishes 12.9 alloy steel, 18-8/A2 stainless, A4/316 where noted; black oxide on alloy where specified. M3 Size & Pitch Reference Need head dimensions, countersink details, or pilot hole guidance? See the M3 screw size chart . Matching M3 Nuts & Washers Pair your screws with the right hardware for a complete fastening solution: Metric Nuts & Washers (All) — filter for M3 to match threads precisely. Frequently Asked Questions What’s the standard thread pitch for M3 screws? The most common pitch is 0.5 mm (coarse). Always confirm on the specific item page. Which hex key sizes are typical for M3 socket screws? It varies by head style and manufacturer. For replacements, visit the Hex Key Hub or pick up Individual Metric Keys . Does black oxide prevent rust? Black oxide provides a mild protective layer and a dark appearance. For outdoor or high-moisture environments, stainless is generally the better choice. Are M3 machine screws suitable for plastics? Standard machine-thread M3 screws are intended for tapped holes (or inserts)