Fastener Information Hub: Sizing, Specifications & Help
Fastener Information Hub: Sizing, Specifications & Help
This is Monster Bolts’ one-stop resource center for fastener sizing, standards, conversions, torque figures, and common terminology. Bookmark this page and share it with your team.
General Fastener Questions & Tools

- Measuring Fasteners — Diameter & length (notes on countersunk/oval head length conventions)
- Printable PDF Ruler — Inch & metric with common screw/washer diameter overlays
- Anodized Titanium Color Chart (UHD 4K)
- Commonly Used Fastener Terms
- Common Fastener Abbreviations
- Thread Galling & Prevention — Especially important for stainless steel
- Custom Fastener Kitting (Yes, we do!)
- How to Remove Stripped Screws
US / Inch Fastener Info

- US (Inch) Screw Sizes with Decimal & Metric Equivalents (e.g., #4 = 0.112 in = ~2.84 mm)
- Threads Per Inch (TPI) Table
- Hex Key Size Chart — US Socket Screws
- Nut to Wrench Size Chart — US
- Fractional Inch to Metric (mm) Chart
Metric Fastener Info

Sizing & Conversions
- Metric to US (Inch) Conversion Table
- Metric Thread Pitch Table
- Hex Key Size Chart — Metric Socket Screws
- Nut to Wrench Size Chart — Metric
Head Dimensions & Drive Sizes
- M1.6 Screw/Bolt Size
- M2 Screw/Bolt Size
- M2.5 Screw/Bolt Size
- M3 Screw/Bolt Size
- M4 Screw/Bolt Size
- M5 Screw/Bolt Size
- M6 Screw/Bolt Size
- M8 Screw/Bolt Size
- M10 Screw/Bolt Size
Strength, Standards & Specifications
- Socket Screw Torque Chart
- Hex Cap Strength Grades & Bolt Markings (Steel & Stainless)
- Stainless Steel Strength Grade Chart (PSI & MPa)
- DIN ↔ ISO Substitution Equivalents (e.g., DIN 7985 vs ISO 7045)
- DIN 912 — Socket Head Cap Screws
- DIN 7984 — Low Head Socket Cap Screws
- ISO 7380 — Button Head Socket Cap Screws
- DIN 7991 — Flat Head Socket Cap Screws
- DIN 916 — Socket Set Screws
Electrical Connector Reference

Miscellaneous

Need help choosing the right fastener? Contact support@monsterbolts.com or call (850) 764-2658. We ship fast from Milton, Florida.