![]() ![]() An inside diameter of 9/16" is the most common size, but some older trailers used 1/2" bushings/bolts.The inside diameter of the bushing in the attaching eye of the spring needs to match the shackle bolts and spring hanger holes used to mount spring.Measure from the center of front bushing in a straight line to the end of spring for HOOK-END, FLAT-END and RADIUS END leaf springs.Measure from the center of the front bushing in a straight line to the center of the rear bushing for DOUBLE-EYE and OPEN-EYE leaf springs.Measure the length of the spring when the spring is not under load (jack up trailer by the frame), this is the free length of the spring.Count the number of leaves, each layer of spring metal is considered a leaf.Match the existing spring according to its shape and type (double eye, slipper-open eye end, slipper-hook end, slipper-flat end, or slipper-radius end), Length and Width.EASTERN MARINE ~ Trailer Boating, Fishing, Crab Gear.
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