Our ESSENTRA / RICHCO part 0437532HJN is a natural nylon hexagonal jam nut designed for thread size 3/8-32. With a distance across flats of 12.7 mm (0.500 in) and an overall height of 3.2 mm (0.125 in), this jam nut is a reliable and durable option for various applications. Made from high-quality nylon material, it provides secure fastening while offering resistance to corrosion and wear.