Overview Reviews Product Description Engine studs are a headless bolt that is threaded at both ends. An engine stud is used to insert one end into othe head or block and then insert a nut or washer on the other end. Conform to I.S.O. Class 8.8 specifications. For manifolds, rocker covers and general engine uses. Papco Automotive Catalog Product Videos Custom Field Box quantity 10 Size M8-1.25 x 38mm Product Reviews Write a Review Write a Review × Paulin M8-1.25 x 38mm Zinc Plated Metric Engine Stud 10 Pc. 264-338 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *