Bulkhead Lock Nut – 3/8" x 24 UNF (-3 AN) – Stainless Steel

A stainless steel lock nut for securing 3/8" x 24 UNF (-3 AN) bulkhead fittings to firewalls, chassis panels, and bulkheads. The lock nut threads onto the bulkhead fitting from the reverse side of the panel, clamping it firmly in place and preventing rotation or loosening under vibration — essential for a safe, leak-free brake line installation.

Typical Applications

• Securing AN3 (3/8" UNF) bulkhead fittings to firewall panels
• Custom brake line builds on road, track, and race cars
• Replacement lock nut for existing bulkhead installations

Product Details

• Thread: 3/8" x 24 UNF (-3 AN)
• Material: Stainless steel
• For use with: 3/8" x 24 UNF (-3 AN) bulkhead brake fittings
• Sold individually

Supplied by BRT Motorsport — brake line and fitting specialists. Fast UK dispatch.