AN12 Bulkhead Lock Nut — 1-1/16" UNF, Anodised AlloyA lightweight anodised alloy 1-1/16" UNF bulkhead lock nut for securing AN12 (-12 AN) bulkhead fittings through a panel, bulkhead, or firewall. The lock nut threads onto the AN12 bulkhead fitting from the reverse side of the panel, clamping the fitting securely in place for a leak-free, rattle-free installation.Key Specifications Size: AN12 (-12 AN / 12 JIC) Thread: 1-1/16" UNF Material: Anodised alloy Application: Securing AN12 bulkhead fittings through panels and firewalls Fitment & CompatibilityDesigned for use with our AN12 Bulkhead Fitting (BRT018) and compatible with all standard AN12 1-1/16" UNF bulkhead fittings. Thread the lock nut onto the bulkhead fitting from the reverse side of the panel and tighten to secure. For other AN sizes, see our full range of AN bulkhead fittings and lock nuts.Why Choose BRT Motorsport?Quality AN fittings and hose for performance builds. Build clean, professional fluid lines with AN fittings from BRT Motorsport.