Compression Spring, Conical, 302 Stainless Steel, Finish Plain, Overall Length 1/2 In, Wire Type Round, Wire Dia 0.032 In, End Type Squared and Not Ground, Large Outside Dia 0.600 In, Small Outside Dia. 0.375 In, LD @ 50% FREE LENGTH 1.53 Lbs, LOAD @ SOLID 2.67 Lbs, Spring Rate 6.13 Lbs/In, Meets/Exceeds ASTM A313