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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Nominal diameter (A) (inches)

Inside widths

Inside length (D) (approx) (inches)

Working load limit (pounds)

Proof load (min) (pounds)

Breaking load (min) (pounds)

Weight each (approx) (pounds)

(B) (min) (inches)

(C) (min) (inches)

1/2

5/8

3/4

7/8

1

1-1/4

1-3/8

1-1/2

1

1.25

1.5

1.75

2

2.5

2.75

3

2

2.5

2.75

3

3.5

4.375

5

5.25

3

3.75

4.5

5.25

6

7.75

8.25

10.5

3,600

6,250

9,000

11,400

16,000

25,650

30,750

34,900

7,200

12,500

18,000

22,800

32,000

51,300

61,500

69,800

14,400

25,000

36,000

45,600

64,000

102,600

123,000

139,600

0.8

1.4

2.1

2.8

4.6

9.0

11.5

15.3