Part# CSB-WPP-KBButn - Small Block Chevy water pump pulley Bolt Kit. This bolt kit will not rust like a chrome bolt can. This Kustom Bitz button head bolt kit is from our standard range of 304 polished stainless steel bolts polished to our KustomBitz standard finish. These are the bolts that have the Allen Key hex type slot in a shallow dome, wide flange head that looks as neat as a button on a shirt. This custom water pump pulley bolt kit will suit all small block Chev 307, 327, 350, 400 V8 engines. This bolt kit comes complete with 4 x bolts, washers and spring washers to enable you to bolt the standard OEM water pump pulley to the water pump shaft when you are NOT using a water pump mounted cooling fan.