Value Collection SIW8X0250-200BX M2.5 Lock Washer 200-pack

Product Description

The VALUE COLLECTION SIW8X0250-200BX is an M2.5 internal tooth lock washer manufactured from 18-8 austenitic stainless steel, Grade A2. With a 2.7mm inside diameter and 5.5mm outside diameter, this washer seats under an M2.5 fastener head or nut to resist loosening caused by vibration and torque. The serrated internal teeth bite into the mating surface as the fastener is tightened, maintaining clamp load without the need for a secondary locking element. The uncoated finish is appropriate for applications where corrosion resistance and material compatibility are the primary selection criteria. This box contains 200 washers.

Internal tooth lock washers in this size range are used in light mechanical assemblies, electronics enclosures, instrumentation panels, and precision equipment where space around the fastener is limited and a low-profile locking solution is required. The M2.5 sizing fits standard metric fastener systems common in commercial equipment, control panels, and light structural assemblies. Installation is typically performed by mechanical technicians and electricians during equipment assembly or panel work.

Key Features

• Internal serrated tooth design bites into mating surface to resist fastener loosening under vibration
• 18-8 austenitic stainless steel, Grade A2 — provides corrosion resistance without plating or coating
• Uncoated finish — no risk of coating delamination in sensitive or high-cleanliness assemblies
• 2.7mm inside diameter sized for M2.5 metric fasteners
• Low-profile form factor suitable for tight clearance applications
• Box quantity of 200 supports production and service volume requirements

Compatibility

Designed for use with M2.5 metric fasteners. Suitable as a locking washer in any assembly that accepts an M2.5 screw or bolt with a mating surface compatible with 18-8 stainless steel contact.

Installation Notes

Install with the teeth facing the fastener head or nut, not the workpiece surface, unless the application specifically requires reverse orientation. Ensure the mating surface is clean and free of debris before tightening so the teeth engage properly. No special tools are required beyond standard hand tools appropriate for M2.5 fasteners. Avoid reusing lock washers that have been fully compressed, as the teeth may not re-engage with sufficient force.