Bolt Grades Torque Specs cahart

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wSw.lIocaEtions/Gsan-diegOo-metal#1 858-277-8200

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wSw.induAstrialmeNtalsuply.coJm/locOations/saSn-joseE-metal#1 408-432-4890

METRIC THREAD SIZES

US and METRIC STEEL BOLT GRADES

Thread Size* M1.6 x 0.35 M2 x 0.4 M2.5 x 0.45 M3 x 0.5 M3.5 x 0.6 M4 x 0.7 M5 x 0.8 M6 x 1 M8 x 1.25 M8 x 1 M10 x 1.5 M10 x 1.25 M12 x 1.75 M12 x 1.25 M14 x 2 M14 x 1.5 M16 x 2 M16 x 1.5 M18 x 2.5 M18 x 1.5 M20 x 2.5 M20 x 1.5 M22 x 2.5 M22 x 1.5 M24 x 3 M24 x 2 M27 x 3 M27 x 2 M30 x 3.5 M30 x2

Tap Drill Size** 1.25mm or #55 1.60mm or #52 2.05mm or #46 2.50mm or #39 2.90mm or #32 3.30mm or #30 4.20mm or #19 5.00mm or #8 6.8mm or H 7.00mm or J 8.50mm or R 8.80mm or 11/32 10.20mm or 13/32 10.8mm or 27/64 12.00mm or 15/32 12.50mm or 1/2 14.00mm or 35/64 14.50mm or 37/64 15.50mm or 39/64 16.50mm or 21/32 17.50mm or 11/16 18.50mm or 47/64 19.50mm or 49/64 20.50mm or 13/16 21.00mm or 53/64 22.00mm or 7/8 24.00mm or 15/16 25.00mm or 1.0 26.50mm or 1 3/64 28mm or 1 7/64

*Coarse Series in Bold ** Represents 75% theoretical thread

US TAPERED PIPE THREADS

SAE ID Marks Material

SAE 2 No Marks Low Carbon

Tensile

74,000 psi

SAE 5 3 Lines Medium Carbon Tempered

120,000 psi

SAE 8

6 Lines

Medium Carbon Quenched & Tempered

150,000 psi

ALLEN

None

High Carbon Quenched & Tempered

160,000 psi

8.8

10.9

12.9

ID Marks Tensile

METRIC 8.8

116,000 psi

METRIC 10.9

151,000 psi

METRIC 12.9

177,000 psi

US BOLT TORQUE SPECIFICATIONS *** (lbs/ft)

Bolt 1/4"-20 1/4"-28 5/16" -18 5/16" -24 3/8"-16 3/8"-24 7/16"-14 7/16"-20 1/2"-13 1/2"-20 5/8"-11 5/8"-18 3/4"-10 3/4"-16 7/8"-9 7/8"-14 1"-8 1"-12

Grade 2 5 6 9 12 16 22 24 34 47 52 98

115 157 180 210 230 320 350

Grade 5 8 10 17 19 30 35 50 55 75 90

150 180 260 300 430 470 640 710

Grade 8 12 14 25 29 45 50 70 80 110 120 220 240 380 420 600 660 900 990

ALLEN 12.9 177,000 psi

SHCS 14 16 29 33 49 54 76 85 113 126 230 255 400 440 640 700 980

1060

Thread Size 1/16"-27 1/8"-27 1/4"-18 3/8"-18 1/2"-14 3/4"-14 1"-11 1/2 1 1/4"-11 1/2 1 1/2" -11 1/2

Tap Drill Size C Q

7/16" 9/16" 45/64" 29/32" 1 9/64" 1 31/64" 1 21/32"

METRIC BOLT TORQUE SPECIFICATIONS*** (lbs/ft)

Bolt M6 x 1.0 M8 x 1.25 M10 x 1.5 M12 x 1.75 M14 x 2 M16 x 2 M18 x 2.5 M20 x 2.5

Grade 8.8 7 17 34 59 94

146 210 292

Grade 10.9 11 26 51 88 139 210 285 401

*** Decrease Values 15-25% for lubricated or plated bolts

Grade 12.9 12 29 57 99 158 250 341 489



Allen 12 29 57 99 158 250 341 489

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