Compression Spring, Conical, 302 Stainless Steel, Finish Plain, Overall Length 3/8 In, Wire Type Round, Wire Dia 0.035 In, End Type Squared and Not Ground, Large Outside Dia 0.480 In, Small Outside Dia. 0.187 In, LD @ 50% FREE LENGTH 3.92 Lbs, LOAD @ SOLID 6.37 Lbs, Spring Rate 20.91 Lbs/In, Meets/Exceeds ASTM A313