Washers: Flat, Spring, Seal and Lock Varieties for Secure Fixings

Washers distribute load, seal joints and prevent loosening. Choosing the correct washer type is a small decision that can significantly improve the lifespan and safety of any bolted or screwed connection.

Common washer types and uses

Flat washers spread load and protect soft surfaces. Spring and lock washers resist rotation in vibrating assemblies, while sealing washers prevent leakage in plumbing or weather-exposed joints. Material selection is key: stainless steel for corrosion resistance, brass for conductivity and plastic for insulation or sealing.

Selection guidelines and practical notes

• Flat washers: choose a diameter that covers the bearing surface of the head or nut.
• Lock and spring washers: use where vibration may loosen fasteners.
• Sealing washers: rubber-bonded options for plumbing and external fixtures.
• Material match: avoid dissimilar metals in corrosive environments to prevent galvanic action.

Keep assortments of common washer sizes for general maintenance; buying in packs usually reduces unit cost. For specialised applications, verify standards and temperature ratings. Proper washer selection prevents damage to assembled parts and reduces the need for frequent re-tightening or repair.