Only HEFTY™ die springs offer you the economy of round wire and the durability of chrome silicon or music wire, plus the world class service you've come to expect from Lee Spring. HEFTY™ die springs are ideal for any high stress, heavy load application. Our customers have found that our high-performance HEFTY™ die springs are also great for use in such diverse applications as clutches, brakes, farm machinery and aircraft mechanisms. And Lee Spring offers five different types of durable HEFTY™ die springs with different load ratings to fit standard diameters. Recent independent testing conducted by the Institute of Spring Technology has proven that Lee Spring's HEFTY™ die springs have a life expectancy equal to traditional rectangular wire die springs.

Lee Spring® HEFTY™ Compression Spring, Full Coverage Heavy Duty Heavy Load, 1.2 in Outside Dia, 0.243 in Dia Wire, 3-1/2 in Overall Length, 2.44 in Length Under Load, 7.9 Coils, Round, 715 in-lb Spring Constant, 757.9 lb at 30% Deflection, Chrome Silicon, Powder Coated, Black