Value Collection SEW8X1200-100BX M12 Lock Washer 100pk

Product Description

The VALUE COLLECTION SEW8X1200-100BX is an external tooth lock washer designed for use with M12 fasteners in applications where vibration resistance and secure clamping are required. With a 13mm inside diameter and 20.5mm outside diameter, this serrated washer seats firmly under a bolt head or nut and bites into the mating surface to resist loosening under load. Manufactured from Grade 18-8 austenitic stainless steel (A2), it offers solid corrosion resistance suitable for both indoor and outdoor installations. The package contains 100 washers, making it practical for production work, service trucks, and shop stock. Thickness is 1.0mm. This is a general-purpose hardware item installed by any trade discipline working with M12 fastener assemblies.

External tooth lock washers like the SEW8X1200-100BX are used across HVAC, plumbing, electrical, and general mechanical assembly wherever M12 bolts require additional resistance to vibration-induced loosening. Common install scenarios include equipment mounting, panel attachment, and structural fastener assemblies in both residential and light commercial environments. The stainless steel construction makes this washer appropriate for environments with moisture exposure, chemical splash, or outdoor conditions where carbon steel hardware would corrode prematurely.

Key Features

• External serrated tooth design bites into mating surface to resist vibration loosening
• Grade 18-8 austenitic stainless steel (A2) provides corrosion resistance in wet or outdoor environments
• 13mm inside diameter sized for M12 fasteners
• 20.5mm outside diameter with 1.0mm thickness for consistent seating under standard M12 hardware
• Sold in a 100-piece package, suitable for shop stock or job-site supply

Compatibility

Designed for use with M12 screws, bolts, and nuts as a standard external tooth lock washer in general mechanical, HVAC, plumbing, and electrical fastener assemblies.

Installation Notes

Install with the serrated teeth facing the mating surface, positioned between the fastener head or nut and the workpiece. De-energize or shut off any equipment before performing fastener work on live assemblies. Use appropriate hand tools or torque wrenches to achieve the fastener specification required by the equipment manufacturer or applicable code. Do not stack multiple lock washers on a single fastener.