Bolt, screw & thread size charts

Complete reference for bolt sizes, wrench sizes, thread pitch, tap drills, and torque specifications. Interactive tools, engineering guides, and conversion calculators for metric and imperial fasteners.

🔩Metric Bolts17 sizes — M2 to M30 🔧Imperial / SAE Bolts13 sizes — #8 to 1 inch ⚙️Metric Fine Bolts8 sizes — M8×1.0 to M20×1.5 🛠️Socket Cap Screws9 sizes — M3 to M20 📍Set / Grub Screws6 sizes — M3 to M10 🔗Lag & Coach Screws4 sizes — M6 to M12 🔩Hex Flange Bolts6 sizes — M6 to M16 🔳Nuts & Wrench Sizes9 sizes — M3 to M20 🔧Imperial Fine (UNF)8 sizes — 1/4 to 3/4 inch 🛠️Interactive ToolsTorque calculator, bolt finder 📚Engineering GuidesMaterials, standards, selection ⚖️Size ComparisonsMetric vs imperial, grades

🔩 Metric Bolts

M24 mm wrench · 0.4 mm pitchM2.55 mm wrench · 0.45 mm pitchM35.5 mm wrench · 0.5 mm pitchM47 mm wrench · 0.7 mm pitchM58 mm wrench · 0.8 mm pitchM610 mm wrench · 1.0 mm pitchM813 mm wrench · 1.25 mm pitchM1017 mm wrench · 1.5 mm pitchM1219 mm wrench · 1.75 mm pitchM1422 mm wrench · 2.0 mm pitchM1624 mm wrench · 2.0 mm pitchM1827 mm wrench · 2.5 mm pitchM2030 mm wrench · 2.5 mm pitchM2232 mm wrench · 2.5 mm pitchM2436 mm wrench · 3.0 mm pitchM2741 mm wrench · 3.0 mm pitchM3046 mm wrench · 3.5 mm pitch

🔧 Imperial / SAE Bolts

#8-3211/32 in wrench · 32 TPI#10-243/8 in wrench · 24 TPI#12-247/16 in wrench · 24 TPI1/4 in7/16 in wrench · 20 TPI5/16 in1/2 in wrench · 18 TPI3/8 in9/16 in wrench · 16 TPI7/16 in5/8 in wrench · 14 TPI1/2 in3/4 in wrench · 13 TPI9/16 in13/16 in wrench · 12 TPI5/8 in15/16 in wrench · 11 TPI3/4 in1-1/8 in wrench · 10 TPI7/8 in1-5/16 in wrench · 9 TPI1 in1-1/2 in wrench · 8 TPI

🔧 Quick Torque Converter

Convert between Newton-metres, foot-pounds, and inch-pounds instantly.