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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RR-C-271F

FIGURE 23. Type VI, ring.

TABLE XVIII. Type VI, rings.

Diameter stock (D) (nom) (inches)

Inside diameter (ID) (nom) (inches)

Weight each (approx) (pounds)

Working load limit (pounds)

Proof load (min) (pounds)

Breaking load (min) (pounds)

0.75

0.875

1.125

1.25

1.375

1.5

5.5

1.8

2.6

3.4

3.5

6.5

6.8

10.38

11.7

6,400

7,200

5,600

10,800

10,400

17,000

19,000

34,900

12,800

14,400

11,200

21,600

20,800

34,000

38,000

69,800

38,400

43,200

33,600

64,800

62,400

102,000

114,000

209,400

3.4.5.1 Finish. Rings shall be as specified in 3.2.1.3.

3.4.6 Type VII, swivels.

3.4.6.1 General. Type VII swivels, together with their pins, shall be forged from carbon steel as specified in 3.1.1.2.3. Nuts shall be regular hexagonal.

3.4.6.1.1 Finish. The swivels and pins shall be as specified in 3.2.1.3.

3.4.6.1.2 Proof load. The swivels shall withstand the proof loads in the respective class tables

(see 4.4.2.5.1).