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

3.3.1.5  Type I, class 5, style 1, welded steel twist-link chain, long-link pattern (coil).  The long- link chain shall be similar to figure 2 and shall conform to the dimensions and physical requirements specified in ASTM A467/A467M, class CT.

FIGURE 2.  Type I, class 5, style 1, welded steel twist-link chain, long-link pattern (coil).

3.3.1.6  Type I, class 5, style 2, welded steel twist-link chain, short-link pattern (machine).  The short-link chain shall be similar to figure 3 and shall be in accordance with the dimensions and physical requirements as specified in ASTM A467/A467M, class MT.

FIGURE 3.  Type I, class 5, style 2, welded steel twist-link chain, short-link pattern (machine).

3.3.2  Type II, chain, weldless.

3.3.2.1  Class 1, single-loop pattern chain.  The single-loop pattern chain shall be similar to figure 4 and shall be in accordance with ASTM A466/A466M, class SL.

FIGURE 4.  Type II, class 1, weldless, single-loop pattern chain.

3.3.2.2  Class 2, double-loop pattern chain.  The double-loop pattern chain shall be similar to figure 5 and shall be in accordance with ASTM A466/A466M, class DL.

FIGURE 5.  Type II, class 2, weldless double-loop pattern chain.

3.3.2.3  Class 3, sash chain.  The sash chain shall be similar to figure 6 and shall be in accordance with ASTM A466/A466M, class SH.

FIGURE 6.  Type II, class 3, weldless sash chain.

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