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SECTION 5 - SPECIFICATIONS
5-35
MINIMUM HARDWARE TIGHTENING TORQUES
IN FOOT POUNDS (NEWTON-METERS) FOR NORMAL ASSEMBLY APPLICATIONS
INCH HARDWARE AND LOCKNUTS
1/4 55* (6.2) 7.2* (8.1) 86* (9.7) 112* (13) 121* (14) 157* (18) 61* (6.9) 86* (9.8) 1/4
5/16 115* (13) 149* (17) 178* (20) 229* (26) 250* (28) 324* (37) 125* (14) 176* (20) 5/16
3/8 17 (23) 22 (30) 26 (35) 34 (46) 37 (50) 48 (65) 19 (26) 26 (35) 3/8
7/16 27 (37) 35 (47) 42 (57) 54 (73) 59 (80) 77 (104) 30 (41) 42 (57) 7/16
1/2 42 (57) 54 (73) 64 (87 83 (113) 91 (123) 117 (159) 45 (61) 64 (88) 1/2
9/16 60 (81) 77 (104) 92 (125) 120 (163) 130 (176) 169 (229) 65 (88) 92 (125) 9/16
5/8 83 (112) 107 (145) 128 (174) 165 (224) 180 (244) 233 (316) 90 (122) 127 (172) 5/8
3/4 146 (198) 189 (256) 226 (306) 293 (397) 319 (432) 413 (560) 160 (217) 226 (306) 3/4
7/8 142 (193) 183 (248) 365 (495) 473 (641) 515 (698) 667 (0904) 258 (350) 364 (494) 7/8
1 213 (289) 275 (373) 547 (742) 708 (960) 773 (1048) 1000 (1356) 386 (523) 545 (739) 1
NOMINAL
SIZE
SAE GRADE 2 LOCKNUTS
UNPLATED PLATED
w/ZnCr
NOMINAL
SIZE
SAE GRADE 5 SAE GRADE 8
or
PLATED
SILVER
GOLD
UNPLATED PLATED
w/ZnCr
or
PLATED
SILVER
GOLD
UNPLATED PLATED
w/ZnCr
or
PLATED
SILVER
GOLD
GR.B GR.C
w/GR5
BOLT
w/GR8
BOLT
NOTE: Torque values shown with * are inch pounds.
IDENTIFICATION
CAP SCREWS AND CARRIAGE BOLTS
GRADE 2SAE GRADE 5SAE GRADE 8 SAE
REGULAR NUTS SAE GRADE 5
HEX NUTS
SAE GRADE 6
HEX NUTS
LOCKNUTS
GRADE IDENTIFICATION
GRADEANO NOTCHES
GRADE BONE CIRCUMFERENTIAL NOTCH
GRADE CTWO CIRCUMFERENTIAL N OTCHES
GRADE IDENTIFICATION
GRADEANO MARKS
GRADE BTHREE MARKS
GRADE CSIX MARKS
MARKS NEEDNOT BE LOCATED
GRADEANO MARK
GRADE BLETTER B
GRADE CLETTER C
GRADE IDENTIFICATION
AT CORNERS