304 A2 Stainless Steel Fine Thread Hex Thin Lock Nut M8–M40 1mm/1.5mm for Water Pipes & Faucets

304 A2 Stainless Steel Fine Thread Hex Thin Lock Nut — M8–M40 1mm/1.5mm for Water Pipes & Faucets

304 A2 stainless steel fine thread hex thin lock nuts are specifically designed for water pipe fittings, tap bodies, faucet assemblies, and hydraulic connections where fine thread pitch provides superior sealing performance and vibration resistance compared to coarse thread. The thin (jam nut) profile allows precise torque control during installation without over-compressing sealing washers or O-rings. Available in M8–M40 with 1mm and 1.5mm fine pitch options.

Key Specifications

Why Choose Fine Thread Thin Nuts for Plumbing?

• Fine thread pitch (1mm / 1.5mm) — finer pitch provides better sealing compression control; prevents over-tightening that can crack ceramic tap bodies or damage O-rings
• Thin profile — precise torque control during installation; allows incremental tightening to achieve correct sealing compression
• 304 A2 stainless — corrosion-resistant for water, potable water, and mild chemical environments; will not rust or contaminate water supply
• Wide M8–M40 range — covers small tap bodies (M8–M16) through large pipe fittings and hydraulic manifolds (M24–M40)
• 1mm & 1.5mm pitch options — matches the most common fine thread pitches used in plumbing and hydraulic fittings

Typical Applications

• Kitchen and bathroom tap body and faucet assembly (M20–M30 fine thread)
• Water pipe compression fitting and union nut (M16–M40)
• Shower head and mixer valve body assembly (M20–M30)
• Hydraulic fitting and manifold lock nut (M12–M30 fine thread)
• Pneumatic fitting and valve body assembly (M8–M20)
• Boiler and heating system pipe fitting (M20–M40)

Compatible With

• Fine thread metric tap bodies, faucet bodies, and pipe fittings (1mm / 1.5mm pitch)
• Spanner / socket: M8=13mm, M10=17mm, M12=19mm, M14=22mm, M16=24mm, M18=27mm, M20=30mm, M22=32mm, M24=36mm AF
• Note: verify fine thread pitch of your fitting before ordering — fine thread nuts are NOT compatible with coarse thread fittings

Package Contents

• Fine thread hex thin lock nuts in selected size, pitch, and quantity (per variant)

Frequently Asked Questions

Q: Why do tap and faucet bodies use fine thread?

A: Fine thread provides more precise torque control during installation, which is critical for achieving correct sealing compression on ceramic disc cartridges, rubber washers, and O-rings without cracking the tap body. Fine thread also provides better vibration resistance in plumbing applications subject to water hammer and pressure fluctuations.

Q: Is 304 stainless steel safe for potable water?

A: Yes. 304 stainless steel is approved for potable water contact in most jurisdictions (NSF/ANSI 61, WRAS, EU Drinking Water Directive). It will not corrode, rust, or leach contaminants into the water supply under normal plumbing conditions.

Q: How do I identify the thread pitch of my existing fitting?

A: Use a thread pitch gauge to measure the pitch of your existing fitting. Alternatively, count the number of threads over 10mm of thread length — 10 threads = 1.0mm pitch; 6.7 threads = 1.5mm pitch. Always verify pitch before ordering fine thread nuts.