Compression Spring Conical 302 Stainless Steel Finish Plain Overall Length 3/8 In Wire Type Round Wire Dia 0.040 In End Type Squared and Not Ground Large Outside Dia 0.600 In Small Outside Dia 0.312 In LD @ 50% FREE LENGTH 3.56 Lbs LOAD @ SOLID 5.61 Lbs Spring Rate 18.98 Lbs/In Meets/Exceeds ASTM A313