TORQUE LIMITS - TM-10-5430-239-12-P0253

TM 10-5430-239-12&P

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OPERATOR AND UNIT MAINTENANCE MANUAL

(INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST)

COLLAPSIBLE FABRIC TANK, PETROLEUM, 5,000 BARREL

TORQUE LIMITS

INTRODUCTION

This work package provides general torque limits for fasteners. Special torque values are indicated in the

maintenance procedures for applicable components. The general torque values given in this work package

shall be used when specific torque values are not indicated in the maintenance procedures.

Torque Limits

Torque limits are listed in Table 1 for fasteners. Dry fasteners are defined as fasteners on which no lubricants

are applied to the threads. Wet fasteners are defined as fasteners on which graphite or moly-disulphide

greases or other extreme pressure lubricants are applied to the threads. Table 2 lists the minimum

breakaway torque values for locknuts.

Table 1. General Torque Requirements for Dry Fasteners*

Torque Requirement in lb ft (Nm)

Bolt/Screw

SAE Grade

Size

1 or 2

6 or 7

1/4-20 UNC

5 (7)

8 (11)

10 (14)

12 (16)

1/4-28 UNF

7 (8)

10 (14)

12 (16)

14 (19)

5/16-18 UNC

11 (15)

17 (23)

19 (26)

24 (33)

5/16-24 UNF

13 (18)

19 (26)

23 (31)

27 (37)

3/8-16 UNC

18 (24)

31 (42)

34 (46)

44 (60)

3/8-24 UNF

20 (27)

35 (47)

42 (57)

49 (66)

7/16-14 UNC

28 (38)

49 (66)

55 (75)

70 (95)

7/16-20 UNF

30 (41)

55 (75)

67 (91)

78 (106)

1/2-13 UNC

39 (53)

75 (102)

85 (115)

105 (142)

1/2-20 UNF

41 (56)

85 (115)

102 (138)

120 (163)

9/16-12 UNC

51 (69)

110 (149)

120 (163)

155 (210)

9/16-18 UNF

55 (75)

120 (163)

145 (197)

170 (231)

5/8-11 UNC

63 (85)

150 (203)

167 (226)

210 (285)

5/8-18 UNF

95 (129)

170 (231)

205 (278)

240 (325)

3/4-10 UNC

105 (142)

270 (366)

280 (380)

375 (509)

3/4-16 UNF

115 (156)

295 (400)

357 (484)

420 (570)

7/8-9 UNC

160 (217)

395 (536)

440 (597)

605 (820)

7/8-14 UNF

175 (237)

435 (590)

555 (753)

675 (915)

1-8 UNC

235 (319)

590 (800)

660 (895)

910 (1234)

1-14 UNF

250 (339)

660 (865)

825 (1119)

999 (1342)

1-1/8-7 UNC

350 (475)

800 (1085)

1000 (1356)

1280 (1736)

1-1/8-12 UNF

400 (542)

880 (1193)

1050 (1424)

1440 (1953)

1-1/4-7 UNC

500 (678)

1080 (1464)

1325 (1797)

1820 (2468)

1-1/4-12 UNF

550 (746)

1125 (1526)

1325 (1797)

1820 (2712)

1-3/8-6 UNC

660 (895)

1460 (1980)

1800 (2441)

2380 (3227)

1-3/8-12 UNF

740 (1003)

1680 (2278)

1960 (2658)

2720 (3688)

1-1/2-6 UNC

870 (1180)

1940 (2631)

2913 (3950)

3160 (4285)

1-1/2-12 UNF

980 (1329)

2200 (2983)

3000 (4068)

3560 (4827)

*Torque given is for clean, dry threads. Reduce by 10% when engine oil is used as lubricant.

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