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.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27 - 28 - 29 - 30 - 31 - 32 - 33 - 34 - 35 - 36 - 37 - 38 - 39 - 40 - 41 - 42 - 43 - 44 - 45

RR-C-271F

Class 5 - Twist-link chain

Style 1 - Long-link pattern (coil)

Style 2 - Short-link pattern (machine)

Type II - Chain, weldless (forged and casting) Class 1 - Single-loop pattern chain

Class 2 - Double-loop pattern chain

Class 3 - Sash chain Class 4 - Flat-link chain Class 5 - Bead chain Class 6 - Plumber's chain

Class 7 - Single-jack chain Class 8 - Double-jack chain Class 9 - Ladder chain

Class 10 - Register chain

Class 11 - Mechanical communication chain

1.2.2  Attachment types.  Attachment types, grades, and classes are as follows (see 6.2): Type II - Connecting links

Type III - Repair or end lap links

Type IVA - Anchor shackles

Grade A - Regular

Class 1 - Round pin and cotter

Class 2 - Screw pin

Class 3 - Bolt, nut and cotter

Grade B - High strength

Class 1 - Round pin and cotter

Class 2 - Screw pin

Class 3 - Bolt, nut and cotter

Type IVB - Chain shackles

Grade A - Regular

Class 1 - Round pin and cotter

Class 2 - Screw pin

Class 3 - Bolt, nut and cotter

2