Corrosion Resistant Brass Lock Washers Reliable Heavy Duty Brass Spring Lock Washer DIN 127 for Plumbing
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Descripción
What are Brass Lock Washers?
Brass lock washers are helical (split ring) or toothed fastening components designed to prevent nuts and bolts from loosening due to vibration or torque. They create spring tension and friction between the fastener and the mating surface. Brass is chosen for its corrosion resistance, non-magnetic properties, and electrical conductivity, making these washers ideal for applications where steel would rust or cause interference.
Materials:
| Material Type | Description |
|---|---|
| C26000 (Cartridge Brass) | 70% copper, 30% zinc – High ductility and spring property. |
| C26800 (Yellow Brass) | Standard spring temper, good for general locking use. |
| C28000 (Muntz Metal) | Higher zinc content – increased strength, lower cost. |
| Lead-Free Brass | Compliant with RoHS and low-lead regulations (e.g., for potable water). |
Surface Finishes:
| Finish Type | Purpose |
|---|---|
| Natural (Mill) | As-manufactured, raw brass – suitable for dry or indoor applications. |
| Nickel-Plated | Increased hardness, wear resistance, and decorative silver appearance. |
| Tin-Plated | Enhanced solderability and corrosion protection in electronics. |
| Chrome-Plated | Decorative bright finish for visible architectural use. |
| Anti-Tarnish Coating | Clear lacquer to prevent oxidation and darkening over time. |
Common Specifications of Brass Lock Washers:
| Parameter | Typical Range / Standard |
|---|---|
| Size (Screw/Bolt) | #2 to 1 inch (M2 to M24 metric) |
| Internal Diameter | 2.2 mm – 25 mm (metric); 0.086″ – 1.062″ (inch) |
| Thickness (Split Ring) | 0.5 mm – 3.5 mm (depends on diameter) |
| Standards | DIN 127 (split lock washers), DIN 6798 (toothed lock washers), ASME B18.21.1, ISO 894 |
Application Areas:
| Industry | Typical Use |
|---|---|
| Marine & Boat Building | Fastening deck hardware, navigation lights – resists saltwater corrosion. |
| Electrical & Grounding | Locking ground lugs and terminals – brass is conductive & non-magnetic. |
| Plumbing (Low-lead) | Faucets, water meters, brass fittings – prevents loosening from water hammer. |
| Musical Instruments | Securing tuning pegs and brackets on brass/wind instruments. |
| Historical Restoration | Matching original brass hardware in antique furniture or doors. |
| Explosive Environments (ATEX) | Non-sparking property – oil rigs, grain elevators. |
Excellent Usage Case Example:
Application: Marine Windlass (Anchor Winch) Mounting Bolts
Challenge: A 45-foot sailing vessel experienced repeated loosening of stainless steel nuts on the anchor winch due to constant high vibration and saltwater spray. Standard steel lock washers rusted within weeks, while stainless lock washers suffered from galling and lost spring tension. Failure would risk dropping anchor mid-cruise.
Solution: Brass lock washers (C26000, natural finish, DIN 127, size M10) were installed under each stainless steel nut, with a brass flat washer used as a bearing surface.
Result: After two seasons (8,000+ nautical miles including Atlantic crossings), all fasteners remained at original torque. The brass lock washers showed mild tarnishing but no cracking, galling, or loss of spring force. The combination of brass’s natural lubricity (prevents galling) and corrosion resistance solved the problem completely.
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