M8 Screws, Bolts, Nuts & Washers – Socket Cap (Std, Low, Button, Flat), Set & Phillips

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2025/10/15

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Home › Metric Fasteners › M8 Screws The M8 metric screw (8 mm nominal diameter) is a heavy-duty standard used across machinery, engines, industrial builds, and fabrication. Monster Bolts offers a complete M8 line — Socket Cap (standard, low head, button, flat), Set Screws , Hex Cap Bolts , and Phillips Pan & Flat Machine Screws — plus matching M8 nuts and washers for a full fastening solution. Shop by M8 Head Type M8 Socket Head Cap Screws DIN 912 / ISO 4762 • High clamp force • Allen/Hex drive M8 Low Head Socket Cap Screws Reduced head height • Tight clearance use • Allen/Hex drive M8 Button Head Cap Screws ISO 7380 • Low profile dome head • Allen/Hex drive M8 Flat Socket (Countersunk) Screws DIN 7991 / ISO 10642 • 90° countersink • Flush finish M8 Cup Point Set Screws Grub screws • Allen/Hex drive • Cup point M8 Hex Cap Bolts DIN 933 (full thread) / DIN 931 (partial) • External hex drive M8 Phillips Pan Machine Screws Machine thread • For tapped holes or use with nuts M8 Phillips Flat Machine Screws 90° countersink • Flush finish • Machine thread Quick Specs Spec Details Diameter M8 (8.0 mm nominal) Common Pitch 1.25 mm (coarse) Typical Drive Internal hex/Allen for socket types; Phillips for machine screws; external hex for hex bolts. Need a key? Hex Key Hub or Individual Metric Keys . Materials & Finishes 12.9 alloy steel, 18-8/A2 stainless, A4/316 stainless; black oxide or zinc where specified. M8 Size & Pitch Reference Need head dimensions, countersink details, or torque specs? See the M8 screw size chart . Matching M8 Nuts & Washers Pair your screws and bolts with the right hardware for a complete fastening solution: Metric Nuts & Washers (All) — filter for M8 to match threads precisely. Frequently Asked Questions What’s the standard thread pitch for M8 screws? The standard coarse pitch is 1.25 mm . Fine threads (1.0 mm or 0.75 mm) exist for precision applications. How strong are M8 socket cap screws? Grade 12.9 alloy socket cap screws offe