... are available at request.2.Product Description:Spool bolts are produced to provide extra clearance between insulators ... usually have 2 types of spool bolts: single spool bolts and double spool bolts.Bolts are produced in forged carbon steel ... .3.Product Details:Name: spool bolts, upset bolts, single spool bolts, single upset bolts, double spool bolts, double upset boltsHS code: 7318159001Model: ANSI ...