Compression Spring, Conical, 302 Stainless Steel, Finish Plain, Overall Length 3/8 In, Wire Type Round, Wire Dia 0.055 In, End Type Squared and Not Ground, Large Outside Dia 0.720 In, Small Outside Dia. 0.312 In, LD @ 50% FREE LENGTH 8.34 Lbs, LOAD @ SOLID 11.78 Lbs, Spring Rate 44.49 Lbs/In, Meets/Exceeds ASTM A313