High Tensile forged steel quenched and tempered  


Screw pin chain shackles meet Federal Specification RR-C-271

Bolt type chain shackles with thin head bolt-nut with cotter pin RR-C-271
U. S. FEDERAL SPECIFICATION (RR-C-271)

Safety Factor = 6 up to 85 T. Above S. F =5
From W.L.L. 120 T.: Bolt with straight head & handle grip
Pins : orange paint
Finish : Galvanized up to W.L.L. 120 T.
and Galva paint from W.L.L. 150 T.
From W.L.L.2 T. up to 85 T. : High Tensile Steel
From W.L.L. 120 T. and above : Alloy Steel


Forging tolerances + 5%
W.LL M.T. SIZE A B C D in kg
inches mm MD G 330 MD G 336
120.000 3.1/2 89 95 146 267 - 93.000
150.000 4. 102 108 165 400 - 145.000
200.000 4.3/8 120 130 175 500 - 180.00
250.000 4.3/4 125 140 200 540 - 225.000
300.000 5.1/8 135 150 200 600 _ 305.000
400.000 5.7/8 165 175 225 650 _ 540.000
500.000 6.3/4 175 185 250 700 _ 580.000
600.000 7.1/2 195 205 275 700 _ 850.000
700.000 7.7/8 205 215 300 730 _ 920.000
800.000 8.1/4 210 220 300 730 — 990.000
900.000 8. 21/32 220 230 320 750 — 1165.00
1000.000 9. 230 240 340 750 — 1315.000
1200.000 9.27/32 250 280 400 840 1700.000
1500.000 10. 1/4 260 325 460 840 - 2500.000
For other dimensions, refer to us