TM  9-2330-390-14&P CAUTION If   replacement   capscrews   are   of  higher  grade  than  originally  supplied,  use  torque specifications  for  the  original.  This  will  prevent  equipment  damage  due  to overtorquing. Table  H-1.  Torque  Limits. Current  Usage Quality  of Material SAE  Grade  Number Capscrew   Head Markings 5 6 or 7 8 Manufacturer’s marks  may  vary These  are  all SAE Grade 5 (3  line) Much  Used Indeterminate 1 or 2 Much  Used Minimum Commercial Used  at  Times Medium Commercial Used  at  Times Best Commercial Capscrew  Body  Size Inches  -  Thread 1/4 20 28 5/16 18 24 3/8 16 24 7/18 14 20 1/2 13 20 9/16 12 18 5/8 11 18 3/4 10 16 9 7/8 14 1 8 14 Torque lb.-ft  (Nom) 5 (7) 6 (8) 11 (15) 13 (18) 18 (24) 20 (27) 28 (38) 30 (41) 39 (53) 41 (56) 51 (69) 55 (75) 83 (113) 95 (129) 105 (142) 115 (156) 160 (217) (217) 175 235 (319) 250 (339) Torque lb.-ft.  (Nom) 8 (11) 10 (14) 17 (23) 19 (26) 31 (42) 35 (47) 49 (66) 55 (75) 75 (102) 85 (115) 110 (149) 120 (163) 150 (203) 170 (231) 270 (366) 295 (400) 395 (536) 435 (590) 590 (800) 660 (895) Torque lb.-ft.  (Nm) 10 (14) 19 (26) 34 (46) 55 (75) 85 (115) 120 (163) 167 (226) 280 (380) 440 (597) 660 (895) Torque lb.-ft.  (Nom) 12 (16) 14 (19) 24 (33) 27 (37) 44 (60) 49 (66) 70 (95) 78 (106) 105 (142) 120 (163) 155 (210) 170 (231) 210 (285) 240 (325) 375 (508) 420 (569) 605 (820) 675 (915) 910 (1234) 990 (1342) H-2