RR-C-271 Chains And Attachments, Carbon And Alloy SteelThis specification covers carbon and alloy steel chain of commercial quality together with the attachments most commonly used with this chain.

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Chain size (nom) (inch)

Dimensions

(inches)

Weight each (approx) (pounds)

Working load limit (pounds)

Proof load (min) (pounds)

Breaking load (min) (pounds)

(A)

(B)

(C)

(D)

min

max

min

max

min

max

min

max

9/32

5/16

3/8

1/2

5/8

3/4

7/8

1

1-1/4

0.312

0.36

0.437

0.58

0.71

0.875

1.00

1.116

1.40

0.44

0.49

0.59

0.78

0.91

1.18

1.25

1.38

1.70

1.81

2.13

2.406

3.16

3.80

4.50

5.20

5.75

6.90

2.30

2.81

3.06

3.86

4.54

5.36

5.97

6.50

8.28

0.625

0.83

0.828

1.20

1.50

1.77

2.031

2.187

2.812

0.81

0.89

1.16

1.43

1.74

2.09

2.45

2.75

3.61

0.54

0.68

0.812

1.00

1.25

1.52

1.75

2.00

2.50

0.81

1.00

1.09

1.312

1.593

1.875

2.281

2.625

3.125

0.24

0.35

0.50

1.3

2.3

4.0

4.3

8.4

15.5

4,100

5,100

7,100

13,000

20,300

29,300

39,900

47,700

72,300

8,200

10,200

14,200

26,000

40,600

58,600

79,800

95,400

144,600

16,400

20,400

28,400

52,000

81,200

117,200

159,600

190,800

289,200