Compression Spring, Conical, 302 Stainless Steel, Finish Plain, Overall Length 5/16 In, Wire Type Round, Wire Dia 0.032 In, End Type Squared and Not Ground, Large Outside Dia 0.420 In, Small Outside Dia. 0.156 In, LD @ 50% FREE LENGTH 3.63 Lbs, LOAD @ SOLID 5.77 Lbs, Spring Rate 23.25 Lbs/In, Meets/Exceeds ASTM A313