RR-C-271F
3.1.1.2.2 Type I, class 2, high-test chain; and class 3 transport chain. Type I, class 2 high-test chain; and class 3 transport chain material shall be carbon steel made in accordance with ASTM A576 or ASTM A510. The chain shall be heat treated, as required, to produce the physical requirements specified.
3.1.1.2.3 Type I, classes 4 and 5, chain; type II, connecting links; type III, repair or end lap links; type VII, swivels; and type XV, end links. Type I, classes 4 and 5 chain; type II connecting links; type III repair or end lap links; type VII swivels; and type XV end links material shall be carbon steel made in accordance with ASTM A576 or ASTM A510. The chain and attachments shall be heat treated, as required, to produce the physical requirements
specified.
3.1.1.2.4 Type IVA anchor shackles and type IVB chain shackles. Type IVA and type IVB, grade A shackles shall be made of carbon steel conforming to ASTM A576,
ASTM A920/A920M, ASTM A909/A909M, or ASTM A921/A921M. Type IVA and type IVB, grade B shackles shall be made of alloy steel conforming to ASTM A322. The limitation in the chemical composition shall be as specified in table I.
3.1.2 Type II, classes 1, 2, 3, 4, 7, 8, 9, and 10 chain, weldless. Classes 1, 2, 3, 4, 7, 8, 9, and 10 shall be made of steel, bronze, or brass, as specified (see 6.2). Class 6 shall be made of steel, brass, or aluminum, as specified (see 6.2). Class 11 shall be made of brass.
3.1.3 Type II, class 5 bead chain; type IX bead-chain fasteners; type X bead-chain couplings; and type XI bead-chain insulating couplings. Type II, class 5 bead chain; type IX bead-chain fasteners; and type X bead-chain couplings shall be made of steel, corrosion resistant steel (CRES), or brass as specified (see 6.2). Type XI bead-chain insulating couplings shall have a hard fiber dielectric body fitted at each end with a metal cap made of steel, CRES, or brass as specified (see 6.2).
3.1.4 Recovered materials. The offeror/contractor is encouraged to use recovered materials to the maximum extent practicable, in accordance with paragraph 23.403 of the Federal Acquisition Regulation (FAR).
3.2 Finish.
3.2.1 General. The finish for chain and attachments shall be as specified (see 6.2). The following finishes for chain and attachments are typical.
(a) Self-colored (chain uncoated, attachments cleaned and uncoated) (b) Bright finish (chain cleaned)
(c) Zinc-coated
(d) Painted
3.2.1.1 Type I, chain, welded steel. Unless otherwise specified (see 6.2), the finish for type I, class 2, 3, 4, and 5 shall be self-colored, bright finish, zinc coated or painted. The finish for type I, class 1 shall be bright finish or painted.
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