... steel yellow zinc plated size:1/4",1/8",5/16",3/8",7/16",1/2" thread:UNF,NPT ... 45degree, 67.5degree, 90degree Type: long-type, hydraulic-type, button-head type, double-head type square-type, pin-type, ball-type and other special types Metric Size ... M10x1.25,M10x1.5 Inch size: 1/4",1/8",1/16",3/8",1/2",5/16",7/16" BSPT ... hydraulic cylinders· drives· chains· axels · pumps grease fitting 1/4"-28UNF 45degree