Value Collection SEW8XX1200-100BX M12 Lock Washer 13mm

Product Description

The VALUE COLLECTION SEW8XX1200-100BX is a stainless steel external tooth lock washer designed for M12 fastener applications. It features a 13mm inside diameter and a 20.5mm outside diameter, with a 1mm thickness. The serrated external teeth bite into the mating surface and fastener head to resist loosening caused by vibration or dynamic loading. Manufactured from Grade 316 austenitic stainless steel (A4), this washer offers strong resistance to corrosion, making it well-suited for wet, chemical-exposed, or marine environments. It is supplied uncoated. Electricians, plumbers, mechanical contractors, and equipment fabricators regularly use this type of hardware in structural and panel assembly work.

This lock washer is intended for use with M12 screws and bolts in applications where vibration resistance and corrosion resistance are both required. Typical installations include marine hardware, food-processing equipment, chemical plant piping supports, HVAC equipment frames, and outdoor electrical enclosures. The external tooth profile provides a larger contact area than internal tooth designs, distributing clamping load while maintaining grip. This washer ships individually but is subject to a minimum order quantity of 10 units.

Key Features

• External serrated tooth design resists loosening under vibration and dynamic load
• Grade 316 austenitic stainless steel (A4) for superior corrosion resistance in harsh environments
• 13mm inside diameter fits M12 fasteners
• 20.5mm outside diameter with 1mm thickness for compact profile
• Uncoated finish — no risk of coating delamination in chemical or marine service
• Conforms to DIN 6797 and DIN 6798 standards

Compatibility

Designed for use with M12 screws and bolts as an OEM-style or replacement external tooth lock washer in applications requiring DIN 6797 or DIN 6798 compliant hardware.

Installation Notes

Install this washer between the fastener head or nut and the mating surface, with the teeth facing the bearing surface to ensure positive grip. Ensure the mating surface is clean and free of paint, scale, or debris so the teeth can seat properly. Power down or de-energize any electrical assembly before working on fastener connections inside enclosures. Follow applicable mechanical or electrical codes for torque and fastener selection guidance.