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Internal Bolts & Nuts

SAE GRADE 5-COARSE THREAD

Application Ft. Lbs. (N.m)
Free Spinning Nut & Bolt  NEW Patch-Lock Bolt  Used Patch-Lock Bolt 
1/4-20 5-7 (7-10) 8-10 (11-13) 7-8 (9-11)
5/16-18 12-14 (16-19) 17-21 (23-28) 14-18 (19-24)
3/8-16 21-25 (28-34) 27-33 (37-45) 24-30 (33-41)
7/16-14 31-39 (42-53) 40-50 (54-68) 36-44 (49-60)
1/2-13 49-61 (66-83) 62-78 (84-106) 56-70 (76-95)
9/16-12 71-89 (96-121) 88-108 (119-146) 80-98 (108-133)
5/8-11 98-122 (133-165) 119-147 (161-199) 109-135 (148-183)
3/4-10 179-221 (243-300) 207-255 (281-346) 193-239 (262-324)
7/8-9 276-342 (374-464) 319-393 (433-533) 298-368 (404-499)
1-8 415-513 (563-696) 469-579 (636-785) 442-546 (599-740)
1 1/8-7 537-663 (728-899) 600-740 (813-1003) 568-702 (770-952)
1 1/4-7 752-928 (1020-1258) 821-1013 (1113-1373) 787-971 (1067-1316)
1 3/8-6 982-1218 (1331-1651) 1060-1314 (1437-1782) 1022-1266 (1386-1716)
1 1/2-6 1305-1615 (1769-2190) 1395-1725 (1891-2339) 1350-1670 (1830-2264)
These torque values are to be used only when no other torque specs are given
SAE GRADE 5-FINE THREAD

Application Ft. Lbs. (N.m)
Free Spinning Nut & Bolt  NEW Patch-Lock Bolt  Used Patch-Lock Bolt 
1/4-28 6-8 (8-11) 9-11 (12-15) 8-9 (10-13)
5/16-24 13-15 (18-20) 18-22 (24-30) 15-19 (20-26)
3/8-24 23-27 (31-37) 29-35 (39-47) 26-32 (35-43)
7/16-20 36-44 (49-60) 45-55 (61-75) 41-49 (56-66)
1/2-20 59-71 (80-96) 72-88 (98-119) 67-80 (91-108)
9/16-18 81-99 (110-134) 98-118 (133-160) 90-108 (122-146)
5/8-18 118-142 (160-193) 139-167 (188-226) 129-155 (175-210)
3/4-16 199-241 (270-327) 227-275 (308-373) 213-259 (289-351)
7/8-14 308-374 (418-507) 351-425 (476-576) 330-400 (447-542)
1-12 458-556 (621-754) 512-622 (694-843) 485-589 (658-799)
1 1/8-12 597-723 (809-980) 660-800 (895-1085) 628-762 (851-1033)
1 1/4-12 832-1008 (1128-1367) 901-1093 (1222-1482) 867-1051 (1175-1425)
1 3/8-12 1142-1378 (1548-1868) 1220-1474 (1654-1998) 1182-1426 (1603-1933)
1 1/2-12 1485-1795 (2013-2434) 1575-1905 (2135-2583) 1530-1850 (2074-2508)
These torque values are to be used only when no other torque specs are given
SAE GRADE 8-COARSE THREAD

Application Ft. Lbs. (N.m)
Free Spinning Nut & Bolt  New Patch-Lock Bolt  Used Patch-Lock Bolt 
1/4-20 8-10 (11-13) 10-13 (14-18) 9-11 (12-15)
5/16-18 16-20 (22-27) 21-27 (28-37) 19-23 (26-31)
3/8-16 31-39 (42-53) 38-46 (52-62) 35-43 (47-58)
7/16-14 49-61 (66-83) 57-73 (77-99) 54-66 (73-89)
1/2-13 71-89 (96-121) 85-105 (115-142) 79-97 (107-132)
9/16-12 98-122 (133-165) 114-142 (155-193) 103-132 (140-179)
5/8-11 152-188 (206-255) 173-213 (235-289) 163-201 (221-273)
3/4-10 250-310 (339-420) 278-344 (377-466) 264-328 (358-445)
7/8-9 412-508 (559-689) 454-560 (616-759) 434-534 (588-724)
1-8 609-751 (826-1018) 663-817 (899-1108) 636-784 (862-1063)
1 1/8-7 858-1062 (1163-1440) 921-1139 (1249-1544) 889-1101 (1205-1493)
1 1/4-7 1217-1503 (1650-2038) 1286-1588 (1744-2153) 1252-1546 (1697-2096)
1 3/8-6 1589-1971 (2154-2672) 1677-2067 (2260-2802) 1629-2019 (2209-2737)
1 1/2-6 2109-2611 (2859-3540) 2189-2731 (2968-3703) 2154-2666 (2920-3615)
These torque values are to be used only when no other torque specs are given
SAE GRADE 8-FINE THREAD

Application Ft. Lbs. (N.m)
Free Spinning Nut & Bolt  NEW Patch-Lock Bolt  Used Patch-Lock Bolt 
1/4-28 9-11 (12-15) 12-14 (15-19) 10-12 (14-16)
5/16-24 18-22 (24-30) 23-29 (31-39) 21-25 (28-34)
3/8-24 31-39 (42-53) 38-46 (52-62) 35-43 (47-58)
7/16-20 54-66 (73-89) 62-78 (84-106) 59-71 (80-96)
1/2-20 81-99 (110-134) 95-115 (129-156) 89-107 (121-145)
9/16-18 118-142 (160-193) 134-162 (182-220) 126-152 (171-206)
5/8-18 162-198 (220-268) 183-223 (248-302) 173-211 (235-286)
3/4-16 290-350 (393-475) 318-384 (431-521) 304-368 (412-499)
7/8-14 452-548 (613-743) 494-600 (670-813) 474-574 (643-778)
1-12 669-811 (907-1100) 723-877 (980-1189) 696-844 (944-1144)
1 1/8-12 978-1182 (1326-1603) 1041-1259 (1411-1707) 1009-1221 (1368-1655)
1 1/4-12 1357-1643 (1840-2228) 1426-1728 (1933-2343) 1392-1686 (1887-2286)
1 3/8-12 1849-2231 (2507-3025) 1927-2327 (2613-3155) 1889-2279 (2561-3090)
1 1/2-12 2409-2911 (3266-3947) 2489-3031 (3375-4109) 2454-2966 (3327-4021)
These torque values are to be used only when no other torque specs are given