Goodridge re-usable locknut to suit bulkhead fittings. Available in zinc plated steel, stainless steel or anodised aluminium and in various threads.
Goodridge Bulkhead Fitting Locknut - 3 JIC (3/8 X 24), Silver, Plated Steel, Z1 plated, Silver
Goodridge Bulkhead Fitting Locknut - 4 (7/16 x 20 UNF), Blue
Automotive Plumbing Solutions Bulkhead Fitting Locknut - 3 JIC (3/8 X 24), Black, Anodised Aluminium, Black
Automotive Plumbing Solutions Bulkhead Fitting Locknut - 04 JIC 7/16? UNF, Blue
Automotive Plumbing Solutions Bulkhead Fitting Locknut - 12, Blue
Goodridge Male / Bulkhead Fitting For Hardline Hose - Straight Bulkhead 9/16 UNF Thread For 10mm Hose, Black/blue