Compression Spring, Conical, 302 Stainless Steel, Finish Plain, Overall Length 5/8 In, Wire Type Round, Wire Dia 0.072 In, End Type Squared and Not Ground, Large Outside Dia 0.975 In, Small Outside Dia. 0.438 In, LD @ 50% FREE LENGTH 14.85 Lbs, LOAD @ SOLID 22.85 Lbs, Spring Rate 47.49 Lbs/In, Meets/Exceeds ASTM A313