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 9. Type II, class 6, weldless plumber's chain.

3.3.2.7 Class 7, single-jack chain. The single-jack chain shall be similar to figure 10 and shall be in accordance with ASTM A466/A466M, class SJ.

FIGURE 10. Type II, class 7, weldless single-jack chain.

3.3.2.8 Class 8, double-jack chain. The double-jack chain shall be similar to figure 11 and shall be in accordance with ASTM A466/A466M, class DJ.

FIGURE 11. Type II, class 8, weldless double-jack chain.

3.3.2.9 Class 9, ladder chain. The ladder chain shall be similar to figure 12 and shall be in accordance with the requirements as shown in table IV.

FIGURE 12. Type II, class 9, weldless ladder chain. TABLE IV. Type II, class 9, weldless ladder chain.

Nominal size of chain (inch)

Number of links per foot (approx)

Weight per 100 feet (approx) (pounds)

Breaking loads (min) (pounds)

Steel

Brass or bronze

0.036

0.048

0.055

0.080

0.8

2.5

3.5

145

130

3.3.2.10 Class 10, register chain. The register chain shall be similar to figure 13 and shall be in accordance with ASTM A466/A466M, class RG.