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FASTENER TORQUE CHARTS

BOLT CLAMP LOADS

Suggested Assembly Torque Values

USS/SAE GRADE 5

DIAMETER & THREADS PER INCH 1/4-20 28 5/16-18 24 3/8-16 24 7/16-14 20 1/2-13 20 9/16-12 18 5/8-11 18 3/4-10 16 7/8-9 14 1-8 14 TENSILE STRENGTH MIN. PSI 120,000 120,000 120,000 120,000 120,000 120,000 120,000 120,000 120,000 120,000 120,000 120,000 120,000 120,000 120,000 120,000 120,000 120,000 120,000 120,000 PROOF LOAD LBS. 2,700 3,100 4,450 4,900 6,600 7,450 9,050 10,100 12,100 13,600 15,500 17,300 19,200 21,800 28,400 31,700 39,300 43,300 51,500 57,700 CLAMP LOAD LBS. 2,020 2,320 3,340 3,700 4,950 5,600 6,780 7,570 9,050 10,200 11,600 12,950 14,400 16,350 21,300 23,780 29,450 32,450 38,600 43,300 TORQUE DRY FT. LBS. 8 10 17 19 30 35 50 55 75 85 110 120 150 170 260 300 430 470 640 720 LUBRICATED FT. LBS. 6.3 7.2 13 14 23 25 35 40 55 65 80 90 110 130 200 220 320 350 480 540 TENSILE STRENGTH MIN. PSI 150,000 150,000 150,000 150,000 150,000 150,000 150,000 150,000 150,000 150,000 150,000 150,000 150,000 150,000 150,000 150,000 150,000 150,000 150,000 150,000

USS/SAE GRADE 8

PROOF LOAD LBS. 3,800 4,350 6,300 6,950 9,300 10,500 12,800 14,200 17,000 19,200 21,800 24,400 27,100 30,700 40,100 44,800 55,400 61,100 72,700 81,500 CLAMP LOAD LBS. 2,850 3,250 4,700 5,200 6,980 7,900 9,550 10,650 12,750 14,400 16,350 18,250 20,350 23,000 30,100 33,500 41,600 45,800 54,500 61,100 TORQUE DRY FT. LBS. 12 14 24 27 45 50 70 80 110 120 150 170 210 240 380 420 600 670 910 1,020 LUBRICATED FT. LBS. 9 10 18 20 35 35 50 60 80 90 110 130 160 180 280 310 450 500 680 760

When using Anti-seize, reduce the lubed chart reading by 20% to properly torque. Always lubricate and use lubed torque values. NOTES: The above recommended assembly torques are offered as a guide only. Torque specifications, especially for critical joints, should be determined under actual assembly conditions due to the many variables involved which are difficult to predict and do affect the torque-tension relationship. The above recommended clamp loads are based on 75% of the minimum specified proof loads for each grade and size.

YIELD STRENGTH MIN. STRESS (PSI) 92,000 81,000 130,000

Torques for Grades 5 and 8 were calculated based on the following relationship: T=RDP Where: T = Torque (ft. lbs.) D = Nominal Diameter (in.) P = Clamp Load (lbs.) R = Tightening Coefficient

The value of R is assumed to be equal to .20 for dry, unplated conditions and equal to .15 for lubricated, including plated, conditions. Actual values of R can vary between .05 and .35 for commonly encountered conditions.

TENSILE STRESS MIN. (PSI) 120,000 105,000 150,000 BOLT WRENCH DIAMETER SIZE 1/4 7/16 5/16 1/2 3/8 9/16 7/16 5/8 1/2 3/4 9/16 13/16 5/8 15/16 3/4 1-1/8 7/8 1-5/16 1" 1-1/2 1-1/8 1-11/16 1-1/4 1-7/8 1-3/8 2-1/16 1-1/2 2-1/4 1-3/4 2-5/8 2" 3" 2-1/4 3-3/8 2-1/2 3-3/4 2-3/4 4-1/8 3" 4-1/2

STRENGTH GRADE SAE Gr. 5

SAE Gr. 8

APPLICABLE SIZES 1/4" thru 1" diameter over 1" diameter thru 1-1/2" diameter 1/4" thru 1" diameter

PROOF LOAD STRESS (PSI) 85,000 74,000 120,000

Pounds to Inch Pound Conversion lbs. x 12 = inch lbs. Example: 9 lbs. x 12 = 108 inch lbs.

PH. 1-800-558-2808

FAX. 1-800-553-8769

WEB. www.imperialsupplies.com

FASTENER TORQUE CHARTS

GUIDE FOR PREVAILING-TORQUE LOCK NUT ASSEMBLY TORQUES (CAD AND WAX, GRADE B, C, AND GRADE G FLANGE NUTS) LOCK NUT STANDARDS FROM IFI-100 REQUIREMENTS

Torque-Tension Requirements

SIZE Threads PER INCH 1/4­20 1/4­28 5/16­18 5/16­24 3/8­16 3/8­24 7/16­14 7/16­20 1/2­13 1/2­20 9/16­12 9/16­18 5/8­11 5/8­18 3/4­10 3/4­16 7/8­9 7/8­14 1­8 1­12 1­14 1-1/8­7 1-1/8­12 1-1/4­7 1-1/4­12 1-3/8­6 1-3/8­12 1-1/2­6 1-1/2­12 CLAMP LOAD (LB) 2,000 2,300 3,350 3,700 4,950 5,600 6,800 7,550 9,050 10,200 11,600 13,000 14,500 16,300 21,300 23,800 29,500 32,400 38,700 42,300 43,000 42,100 47,500 53,500 59,700 63,800 72,900 77,600 87,700 GRADE B ASSEMBLY TORQUE MAX. MIN. 85** 60** 90** 65** 150** 110** 160** 120** 20 14.5 22 16 32 23 34 24 50 37 52.5 37.5 70 50 77.5 57.5 95 70 97.5 72.5 165 125 165 120 250 185 270 200 375 275 395 290 400 300 404 294 437 327 513 375 549 412 612 445 670 503 745 545 807 605 CLAMP LOAD (LB) 2,850 3,250 4,700 5,200 6,950 7,900 9,600 10,700 12,800 14,440 16,400 18,300 20,300 23,000 30,100 33,600 41,600 45,800 54,600 59,750 61,100 69,000 76,800 87,000 96,600 104,000 118,000 127,000 142,000 GRADE C ASSEMBLY TORQUE MAX. MIN. 125** 85** 125** 85** 190** 130** 200** 140** 28 20 29 21 43 31 43 31 62.5 45 70 50 95 70 95 70 122.5 90 125 90 210 155 210 155 312.5 225 312.5 225 462.5 360 490 360 500 362.5 585 454 622 453 736 573 782 570 880 685 955 696 1,075 837 1,150 837 CLAMP LOAD (LB) 2,850 3,250 4,700 5,200 6,950 7,900 9,600 10,700 12,800 14,440 16,400 18,300 20,300 23,000 30,100 33,600 41,600 45,800 54,600 59,750 61,100 69,000 76,800 87,000 96,600 104,000 118,000 127,000 142,000 GRADE G ASSEMBLY TORQUE MAX. MIN. 150** 100** 160** 105** 240** 155** 230** 155** 32 21 33 22 51 34 60 40 85 55 89 59 120 80 132 88 143 95 175 115 240 160 270 170 360 260 402 247 530 410 -- -- 645 398 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

Grade C

Grade B

Grade G

· Clamp Loads for the Grade B lock nuts equal 75% of the bolt proof loads specified for SAE J-429 Grade 5, and ASTM A-449 bolts. Clamp Loads for Grade C lock nuts equal 75% of the bolt proof loads specified for SAE J-429 Grade 8, and ASTM A-354 Grade BD bolts. · IFI-100 does not govern lock nuts above 1". The values shown in the chart are to be used as a mid-range guideline. ** Torque values for 1/4" and 5/16" sizes are in inch lbs. All other torque values are in foot lbs.

METRIC TORQUE CHART FOR HEX HEAD CAP SCREWS

SIZE M4 x .70 Pitch M5 x .80 Pitch M6 x 1.00 Pitch M7 x 1.00 Pitch M8 x 1.25 Pitch M8 x 1.00 Pitch M10 x 1.50 Pitch M10 x 1.00 Pitch M10 x 1.25 Pitch M12 x 1.75 Pitch M12 x 1.25 Pitch M12 x 1.50 Pitch M14 x 2.00 Pitch M14 x 1.50 Pitch M16 x 2.00 Pitch M18 x 2.50 Pitch M20 x 2.50 Pitch M22 x 2.50 Pitch M24 x 3.00 Pitch M6 x 1.00 Pitch M8 x 1.25 Pitch M10 x 1.50 Pitch M12 x 1.75 Pitch M14 x 2.00 Pitch M16 x 2.00 Pitch CLASS 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 8.8 10.9 10.9 10.9 10.9 10.9 10.9 NEWTON METERS ZINC PLATED UNPLATED 3.1 2.2 6.1 5.5 10.4 9.5 17.0 15.5 25.0 23.0 27.0 24.5 51.0 46.0 57.0 52.0 54.0 49.0 87.0 79.0 96.0 87.0 92.0 83.0 140.0 125.0 150.0 135.0 215.0 195.0 300.0 280.0 430.0 390.0 580.0 530.0 740.0 670.0 15.5 14.0 37.0 34.0 75.0 68.0 160.0 117.0 205.0 185.0 310.0 280.0 FOOT POUNDS (APPROX.) ZINC PLATED UNPLATED 2.30 1.65 4.58 4.13 7.80 7.13 12.75 11.63 18.75 17.25 20.25 18.38 38.25 34.50 42.75 39.00 40.50 36.75 65.25 59.25 72.00 65.25 69.00 62.25 105.00 93.75 112.50 101.25 161.25 146.25 225.00 210.00 322.50 292.50 435.00 397.50 555.00 502.50 11.63 10.50 27.75 25.50 56.25 51.00 97.50 87.75 153.75 138.75 232.50 210.00 CLASS

TORQUE CHART FOR STAINLESS STEEL CAP SCREWS

316 SIZE 6-32 6-40 8-32 8-36 10-24 10-32 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 9/16-12 9/16-18 5/8-11 5/8-18 3/4-10 3/4-16 7/8-9 7/8-14 1"-8 1"-14

INCH-LBS.

18/8

INCH-LBS.

8.8

10.9

10.1 12.7 20.7 23.0 23.8 33.1 78.8 99.0 138.0 147.0 247.0 271.0 393.0 418.0 542.0 565.0 713.0 787.0 1,160.0 1,301.0 1,582.0 1,558.0 2,430.0 2,420.0 3,595.0 3,250.0

9.6 12.1 19.8 22.0 22.8 31.7 75.2 94.0 132.0 142.0 236.0 259.0 376.0 400.0 517.0 541.0 682.0 752.0 1,110.0 1,244.0 1,530.0 1,490.0 2,328.0 2,318.0 3,440.0 3,110.0

PH. 1-800-558-2808

FAX. 1-800-553-8769

WEB. www.imperialinc.com

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