1/64 0.0156 inch 0.397 mm 0.0313 inch 0.794 mm 3/64 0.0469 inch 1.191 mm 0.0625 inch 1.588 mm 5/64 0.0781 inch 1.984 mm 0.0938 inch 2.381 mm 7/64 0.1094 inch 2.778 mm 0.1250 inch 3.175 mm 9/64 0.1406 inch 3.572 mm 0.1563 inch 3.969 mm 11/64 0.1719 inch 4.366 mm 0.1875 inch 4.763 mm 13/64 0.2031 inch 5.159 mm 0.2188 inch 5.556 mm 15/64 0.2344 inch 5.953 mm 0.2500 inch 6.350 mm 17/64 0.2656 inch 6.747 mm 0.2813 inch 7.144 mm 19/64 0.2969 inch 7.541 mm 0.3125 inch 7.938 mm 21/64 0.3281 inch 8.334 mm 0.3438 inch 8.731 mm 23/64 0.3594 inch 9.128 mm 0.3750 inch 9.525 mm 25/64 0.3906 inch 9.922 mm 0.4063 inch 10.319 mm 27/64 0.4219 inch 10.716 mm 0.4375 inch 11.113 mm 29/64 0.4531 inch 11.509 mm 0.4688 inch 11.906 mm 31/64 0.4844 inch 12.303 mm 0.5000 inch 12.700 mm 33/64 0.5156 inch 13.097 mm 0.5313 inch 13.494 mm 35/64 0.5469 inch 13.891 mm 0.5625 inch 14.288 mm 37/64 0.5781 inch 14.684 mm 0.5938 inch 15.081 mm 39/64 0.6094 inch 15.478 mm 0.6250 inch 15.875 mm 41/64 0.6406 inch 16.272 mm 0.6563 inch 16.669 mm 43/64 0.6719 inch 17.066 mm 0.6875 inch 17.463 mm 45/64 0.7031 inch 17.859 mm 0.7188 inch 18.256 mm 47/64 0.7344 inch 18.653 mm 0.7500 inch 19.050 mm 49/64 0.7656 inch 19.447 mm 0.7813 inch 19.844 mm 51/64 0.7969 inch 20.241 mm 0.8125 inch 20.638 mm 53/64 0.8281 inch 21.034 mm 0.8438 inch 21.431 mm 55/64 0.8594 inch 21.828 mm 0.8750 inch 22.225 mm 57/64 0.8906 inch 22.622 mm 0.9063 inch 23.019 mm 59/64 0.9219 inch 23.416 mm 0.9375 inch 23.813 mm 61/64 0.9531 inch 24.209 mm 0.9688 inch 24.606 mm 63/64 0.9844 inch 25.003 mm 1.0000 inch 25.400 mm Hex Keys Size for Socket Head Cap Screws #0 #1 #2 #3 #4 #5 #6 #8 #10 #12 0.050 1/16 5/64 5/64 3/32 3/32 7/64 9/64 5/32 5/32 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 3/16 1/4 5/16 3/8 3/8 7/16 1/2 5/8 3/4 3/4 1/4" - 4" - - 60 18 - B69-B100 1/4"-3/4" 55 57 74 18 35 B80-B100 7/8"-1 1/2" 33 36 60 18 35 B70-B100 1/4"-1" 85 92 120 14 35 C25-C34 1 1/8" - 1 1/2" 74 81 105 14 35 C19-C30 1/4" - 1 1/2" 120 130 150 12 35 C33-C39 140 160 180 10 35 C38-C42 1/4" - 2 1/2" - 105 125 16 50 Max C35 2 5/8" - 4" - 95 115 16 50 Max C35 4 1/8" - 7" - 75 100 18 50 Max C35 1/2" - 1 1/2" 85 92 120 14 35 C24-C35 1/2" - 1 1/2" 120 130 150 14 40 C33-C38 up to 16mm 580 640 800 12 - C22-C32 16mm-72mm 600 660 830 12 - C23-C34 (MPa) (MPa) (MPa) 5mm-40mm 830 940 1040 9 - C32-C39 (MPa) (MPa) (MPa) 1.6mm-40mm 970 1100 1220 8 - C39-C44 (MPa) (MPa) (MPa) - 8.8 10.9 12.9 B 7 A325 A490 Grade 5 (SAE J429) Medium Carbon Steel QT Grade 8 (SAE J429) Medium Carbon Alloy Steel QT Grade 9 Medium Carbon Alloy Steel QT Grade B7 (A193) Medium Carbon Alloy Steel QT Grade A325 (F3125) Medium Carbon Steel QT Grade A490 (F3125) Medium Carbon Alloy Steel QT Metric Class 8.8 Medium Carbon Steel QT Metric Class 10.9 Medium Carbon Alloy Steel QT Metric Class 12.9 Medium Carbon Alloy Steel QT 307A A307 (Grade A) Low or Medium Carbon Steel Grade 2 (SAE J429) Low or Medium Carbon Steel Y i e l d ( m i n ) k s i E l o n g % ( m i n ) N o m i n a l D i a . T e n s i l e ( m i n ) k s i R A % ( m i n ) P r o o f L o a d ( m i n ) k s i R o c k w e l l Bolt Grade and Head Marking Fraction to Decimals / Millimeters Solid Rivet Head Styles Round Head Universal Head Truss Head Pan Head Countersunk Flat Head 3/16 1/8 1/16 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 11/16 13/16 15/16 11/32 9/32 7/32 5/32 1/32 3/32 15/32 17/32 21/32 23/32 25/32 27/32 29/32 31/32 19/32 13/32 TM QUICK REFERENCE GUIDE 16 323.262.0259 zalindustrial.com Fastener Catalog 2018.1