Overview Reviews Product Description Engine stud nuts are used with all types of engine studs. Made of brass for a high quality look for any repair and are made of non-magnetic material that offers excellent corrosion resistance. Papco Nuts Catalog Product Videos Custom Field Box quantity 25 Diameter 3/8"-16 Product Reviews Write a Review Write a Review × Paulin 3/8"-16 UNC Brass Engine Stud Nut 25 Pc. 264-957 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *