Value Collection SIW8X0300-200BX M3 Lock Washer 3.2mm Id

Product Description

The Value Collection SIW8X0300-200BX is a stainless steel internal tooth lock washer designed for M3 fastener applications. It features a 3.2mm inside diameter and a 6.0mm outside diameter with a 0.4mm thickness. Manufactured from Grade 18-8 Austenitic A2 stainless steel, it delivers solid corrosion resistance without any additional coating. The serrated internal teeth bite into the mating surface and fastener head under torque, resisting loosening caused by vibration and thermal cycling. This washer is installed by electricians, plumbers, mechanical contractors, and equipment assemblers wherever M3 fasteners require vibration-resistant retention.

This lock washer is suited for light-duty mechanical and electrical assemblies using M3 screws in residential, commercial, and light industrial settings. The uncoated 18-8 stainless steel construction makes it appropriate for indoor and moderately corrosive environments. It is commonly used in panel assemblies, electrical enclosures, HVAC equipment mounting, and plumbing fixture hardware. Minimum order quantity is 200 pieces, sold as a single package quantity.

Key Features

• Internal serrated teeth grip the fastener and mating surface to resist loosening under vibration
• Grade 18-8 Austenitic A2 stainless steel construction for corrosion resistance
• 3.2mm inside diameter sized for M3 screws
• 6.0mm outside diameter with 0.4mm thickness for low-profile fitment
• Uncoated finish — no plating or coating that can chip or flake in service
• Does not meet military specifications

Compatibility

Designed as an OEM-style replacement or assembly component for applications using M3 threaded fasteners requiring internal tooth lock washer retention.

Installation Notes

Install using standard hand tools appropriate for M3 fastener assemblies. Always power down or de-energize equipment before servicing panels or enclosures where these washers are used. Place the washer between the fastener head and the mating surface with the teeth facing the fastener head to ensure proper engagement. Do not reuse lock washers after removal, as tooth deformation reduces locking effectiveness.