Plow Bolt, 3/8"-16 Thrd Sz, 1-1/2" L, Elliptical Head, Steel, Plain, 100 PK, Midwest Fastener, Mfr#: 01251

A plow bolt is similar to a carriage bolt, except the head is flat or concave. The recess in the mating part must be designed to accept the particular plow bolt.