Compression Spring Conical 302 Stainless Steel Finish Plain Overall Length 5/8 In Wire Type Round Wire Dia 0.063 In End Type Squared and Not Ground Large Outside Dia 0.850 In Small Outside Dia 0.312 In LD @ 50 FREE LENGTH 12.22 Lbs LOAD @ SOLID 19.51 Lbs Spring Rate 39.07 Lbs/In Meets/Exceeds ASTM A313