HEAVY DUTY RUBBER VIBRATION MOUNTING STUDS. FEATURES 1/4 X20 THREADS WITH 1/2 LONG STUD ON ONE END AND 3/4 LONG STUD ON OPPOSITE END
Source: Custom ChromeSKU: 23125
This is just the answer for custom builders. These studs are perfect for mounting gas and oil tanks. Sold in packs of 5 (unless otherwise noted).