Moroso Rear End-Water Fill Cap Kit Steel Product Description:

• Kit includes steel female bung that can be welded to rear ends, tanks, valve covers, filler neck plates and other locations to replenish fluid or serve as an inspection port
• Filler caps are machined from aluminum and include an O-ring for leak free sealing
• 1-1/4" -12UNF Threads, 1.5" O.D.