Compression Spring Medium Duty Color Silver Standard Steel Finish Oil Overall Length 3-1/16 in Outside Dia 7/8 in Wire Type Round Wire Dia 0.091 in End Type Squared and Ground For Hole Size 1-1/64 in For Rod Size 35/64 in Compressed Length 1.090 in Load (Lbs.) 12.55 Deflection @ Load 0.61 in Spring Rate 20.50 lb./in Meets/Exceeds ASTM A227/A228 and AMS 5112 Package Quantity 6