The M12 metric screw (12 mm nominal diameter) is designed for maximum strength and torque in industrial, automotive, and heavy machinery applications. Monster Bolts carries a focused M12 line — Socket Head Cap, Button Head, and Cup Point Set Screws — plus matching M12 nuts and washers to complete any installation.
Shop by M12 Head Type
M12 Socket Head Cap Screws
DIN 912 / ISO 4762 • High strength 12.9 alloy • Allen/Hex drive
M12 Button Head Cap Screws
ISO 7380 • Low-profile dome head • Allen/Hex drive
M12 Cup Point Set Screws
Grub screws • Allen/Hex drive • Cup point tip
Quick Specs
| Spec | Details |
|---|---|
| Diameter | M12 (12.0 mm nominal) |
| Common Pitch | 1.75 mm (coarse) |
| Typical Drive | Internal hex/Allen for socket types. 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. |
M12 Size & Pitch Reference
Need head dimensions, torque specs, or strength data? See the M12 screw size chart.
Matching M12 Nuts & Washers
Pair your screws with the right hardware for a complete fastening solution:
- Metric Nuts & Washers (All) — filter for M12 to match threads precisely.
Frequently Asked Questions
What’s the standard thread pitch for M12 screws?
The standard coarse pitch is 1.75 mm. Fine threads (1.5 mm or 1.25 mm) exist for precision fits and vibration resistance.
How strong are M12 socket cap screws?
Grade 12.9 alloy socket caps provide extremely high tensile strength — ideal for heavy mechanical loads and torque-critical assemblies.
Are M12 screws compatible with 1/2" hardware?
No. M12 metric and 1/2" imperial threads differ in both pitch and diameter. Always use matching metric nuts and washers for M12 threads.
Do black oxide screws resist rust?
Black oxide provides a mild corrosion layer and a clean dark appearance. Choose stainless steel for full corrosion resistance.
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Order with Confidence
Monster Bolts ships fast from the USA and backs every order with helpful support. Need help finding the exact M12 part? Contact our team.
M12-1.75mm Socket Head Cap Screws - Zinc Plated 12.9 Alloy Steel
Sale priceFrom $41.80
M12-1.75mm Button Head Socket Cap Screws - Zinc Plated 12.9 Alloy Steel
Sale priceFrom $71.29