5/16"x 4" Plain Finish Steel Slotted Spring Pin / OVERALL LENGTH: 4.0 INCHES NOMINAL DIAMETER: 0.3125 INCHES NOMINAL MATERIAL THICKNESS: 0.062 INCHES NOMINAL END ITEM IDENTIFICATION: USCG ICE BREAKING TUG 140 FT (WTGB) PART NAME ASSIGNED BY CONTROLLING AGENCY: PINS, SPRING, PLAIN AND/OR 5/16" X 4" PLAIN FINISH STEEL SLOTTED SPRING PIN SPECIAL FEATURES: SPRING PINS ARE ALSO KNOWN AS ROLL, TENSION, SPLIT, AND EXPANSION PINS. RECOMMENDED HOLE SIZE IS THE SAME AS THE DIAMETER. PLAIN FINISH, OR BARE METAL FINISH WHICH MAY CONTAIN A LIGHT COATING OF OIL. MATERIAL: STEEL OVERALL STYLE DESIGNATOR: K174 SLOTTED SPECIFICATION/STANDARD DATA: ASME B18.8.2 NATIONAL STD/SPEC