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