The 5/32 Csk Alum/Steel Rivet max. 15.9mm is crafted for demanding applications, constructed from Aluminium & Steel, featuring a 4.0mm (5/32) diameter with a polished finish, with countersunk head style, requiring a 4.1mm hole, accommodating a grip range of 12.7-15.9mm, measuring 20.9mm in length.