Anvil 1/4 in. FPT Galvanized Malleable Iron Lock Nut is engineered for dependable, vibration-resilient joints in piping and light machinery. Crafted from rugged malleable iron and finished in galvanized coating, this lock nut stands up to moisture, humidity, and daily wear — making it a smart choice for plumbers, maintenance pros, and DIYers working with 1/4" pipe threads.
The 1/4" internal threads (FPT) let it thread onto 1/4" male pipe threads, delivering a tight, leak-resistant connection in a compact profile. The lock nut design helps resist loosening when equipment or fittings endure vibration or thermal cycling, so you don't have to constantly re-tighten joints.
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Internal 1/4" FPT threads mate with 1/4" male pipe threads for a secure, compatible connection.
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Malleable iron construction provides a balance of strength and ductility to withstand torque and impact without cracking.
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Galvanized finish offers robust corrosion resistance in damp or outdoor environments.
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Locking action helps maintain joint integrity in vibration-prone installations, reducing maintenance needs.
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Compact, versatile form suitable for tight spaces in plumbing, HVAC, irrigation, and light industrial setups.
Ideal applications
- Plumbing fittings and pipe joints where a 1/4" male thread is present
- HVAC service connections, especially in areas with moisture exposure
- Light industrial machinery and equipment assemblies that require secure, vibration-resistant joints
- DIY projects and home repairs involving 1/4" pipe-thread assemblies
Tips for best results
Ensure compatibility with your thread standard and apply an appropriate thread sealant or PTFE tape where recommended by the fitting manufacturer. Avoid over-tightening to preserve the lock nut's locking function and the integrity of the threads. Store in a dry place to maximize the galvanized finish's lifespan.
