Value Collection SIW7X0500-100BX M5 Lock Washer Ss 18-8

Product Description

The VALUE COLLECTION SIW7X0500-100BX is a stainless steel internal tooth lock washer designed for M5 screw applications. The internal teeth bite into the mating surface and fastener head to resist loosening caused by vibration and torque. Built from Grade 18-8 Austenitic A2 stainless steel, this washer delivers solid corrosion resistance in wet, outdoor, or chemically exposed environments. It measures 5.3mm inside diameter and 10.0mm outside diameter with a 0.6mm thickness, and ships uncoated. The pack contains 100 washers, making it practical for production assembly, maintenance kits, or field service use.

This lock washer is suited for M5 fastener assemblies across a wide range of mechanical and industrial applications, including HVAC equipment mounting, plumbing fixture installation, electrical panel assembly, and general equipment fabrication. The 18-8 A2 stainless grade makes it appropriate for environments where mild to moderate corrosion resistance is required, such as coastal installations, process piping, or outdoor enclosures. Installers working with stainless fastener assemblies typically select this washer to maintain consistent clamp load under vibration-prone conditions.

Key Features

• Internal tooth design grips both the fastener head and mating surface to resist rotational loosening
• Grade 18-8 Austenitic A2 stainless steel construction for corrosion resistance without coating
• Uncoated finish — no risk of coating delamination affecting electrical continuity or fit
• 5.3mm ID sized for M5 screw clearance fit
• 0.6mm thickness maintains a low stack height in tight assemblies
• Pack of 100 units supports production-volume and bulk service use

Compatibility

Designed for use with M5 screws and bolts requiring an internal tooth lock washer. Compatible with standard M5 fastener assemblies where a 5.3mm ID and 10.0mm OD washer seating surface is appropriate.

Installation Notes

Install with the teeth facing the fastener head or the mating surface per assembly requirements — do not place between two smooth hardened surfaces where the teeth cannot engage. Ensure mating surfaces are clean and free of debris before assembly to allow full tooth engagement. Stainless steel fastener assemblies can be susceptible to galling; use appropriate anti-seize compound on the fastener threads where required. Follow applicable mechanical or electrical codes for torque and fastener specifications in the specific application.