Part No.:KSD-2 14 UNF, KSD-2 14 BSF, KSD-2 516 BSF , KSD-2 38 UNF . Stud Dia:14 UNF, 14 BSF, 516 BSF, 38 BSF . Our quality assurance department is continually striving, for zero errors to maintain our high level of product quality right from design engineering to production and packing. Our quality standards are very high and are second to none.