Nominal size

Working load

limit

Proof load

Min.breaking

load

Weight per 100

Inside length

Inside width

inches

mm

kg

lb

kn

lb

kn

lb

kg

lb

mm

inches

mm

inches

1/4

7.1

1,180

2,600

19.1

4,300

34.5

7,750

36.3

80

21.8

0.86

10.2

0.40

5/16

8.7

1,770

3,900

28.4

6,400

51.6

11,600

50.4

111

26.7

1.05

12.2

0.48

3/8

10.3

2,450

5,400

39.6

8,900

72.0

16,200

72.6

160

30.3

1.19

14.7

0.58

1/2

13.5

4,170

9,200

68.0

15,300

122.7

27,600

128.6

284

36.0

1.43

19.1

0.75