RR-C-271F
TABLE VII. Type III, repair or end lap links.
Diameter of metal (inches) |
Length inside (nom) (inches) |
Working load limit (pounds) |
Weight per 100 links (approx) (pounds) |
Breaking load (min) (pounds) |
0.188 0.219 0.25 0.25 0.25 0.281 0.312 0.312 0.375 0.375 0.5 |
1 1.25 1.25 1.5 2 1.25 1.5 2 1.625 2 2.5 |
225 250 325 325 325 375 675 625 1,050 1,000 1,525 |
5 5.75 7.2 9 10.25 9.3 14.5 17 22 25 54 |
900 1,000 1,300 1,300 1,300 1,500 2,700 2,500 4,200 4,000 6,100 |
3.4.3 Type IV, shackles.
3.4.3.1 General. Type IVA and type IVB, grade A shackles shall be forged from carbon steel as specified in 3.1.1.2.4. Pins and bolts for grade A shackles shall be made from carbon or alloy steel as specified in 3.1.1.2.4. Type IVA and type IVB, grade B shackles, together with their
pins and bolts, shall be forged from alloy steel as specified in 3.1.1.2.4.
3.4.3.1.1 Threads. Screw-pin shackles shall be threaded after fabrication to final size and shape. Threads shall conform to FED-STD-H28 for Unified Coarse (UNC) threads unless the corresponding fine threads are specified (see 6.2). Threads on finished shackles shall be not looser than class 1 fit. The male threads of zinc-coated shackles may be undercut, as necessary, so that after coating they will properly mate (not less than class 1 fit) with the standard size female threads, or the inside threads may be similarly oversized.
3.4.3.1.2 Proof loads. Shackles shall withstand the proof loads shown in table VIII (see
4.4.2.2.1) without developing surface rupture or defects that would interfere with serviceability
or prevent disassembly of the pin. After proof loading, screw-pin shackles shall be disassembled by hand after the first turn.
15
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business