SECTION 5 - SPECIFICATIONS

MINIMUM HARDWARE TIGHTENING TORQUES

IN FOOT POUNDS (NEWTON-METERS) FOR NORMAL ASSEMBLY APPLICATIONS

INCH HARDWARE AND LOCKNUTS

NOMINAL

 

SAE GRADE 2

 

SAE GRADE 5

 

SAE GRADE 8

 

 

 

LOCKNUTS

 

NOMINAL

SIZE

UNPLATED

 

PLATED

UNPLATED

 

PLATED

UNPLATED

 

PLATED

 

GR.B

 

GR.C

SIZE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

or

 

w/ZnCr

 

or

 

w/ZnCr

or

 

w/ZnCr

 

w/GR5

 

w/GR8

 

 

PLATED

 

 

 

PLATED

 

 

 

PLATED

 

 

 

 

BOLT

 

BOLT

 

 

SILVER

 

GOLD

SILVER

 

GOLD

SILVER

 

GOLD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTE: Torque values shown with * are inch pounds.

IDENTIFICATION

CAP SCREWS AND CARRIAGE BOLTS

GRADE 2 SAE

GRADE 5 SAE

GRADE 8 SAE

REGULAR NUTS

SAE GRADE 5

SAE GRADE 6

 

HEX NUTS

HEX NUTS

LOCKNUTS

GRADE IDENTIFICATION

GRADE A NO NOTCHES

GRADE B ONE CIRCUMFERENTIAL NOTCH

GRADE C TWO CIRCUMFERENTIAL NOTCHES

GRADE IDENTIFICATION

GRADE A NO MARK

GRADE B LETTER B

GRADE C LETTER C

GRADE IDENTIFICATION

GRADE A NO MARKS GRADE B THREE MARKS GRADE C SIX MARKS

MARKS NEED NOT BE LOCATED AT CORNERS

5-35

Page 365
Image 365
Buhler 2335, 2425, 2290, 2375, 2360 manual Identification CAP Screws and Carriage Bolts, Locknuts