Value Collection MP42456 M12 Split Lock Washer Grade 8 50-pack

Product Description

The VALUE COLLECTION MP42456 is a metric split lock washer designed for M12 fastener applications requiring a secure, vibration-resistant connection. Made from Grade 8 spring steel with a zinc-plated finish, this washer delivers reliable holding force by biting into the mating surface and fastener head under torque load. The inside diameter ranges from 12.2 to 12.7mm, the maximum outside diameter is 21.1mm, and the thickness is 2.5mm. Hardness is rated Rockwell C44 to C51, providing the spring tension needed to resist loosening under dynamic loads. Licensed trades and maintenance professionals working with M12 metric fasteners reach for this washer when locking performance and corrosion resistance both matter.

This split lock washer suits a wide range of commercial and industrial fastening applications where metric hardware is specified. Typical uses include mechanical equipment assembly, structural connections, HVAC equipment mounting, electrical panel and conduit hardware, and general maintenance work involving M12 bolts or screws. The zinc-plated finish provides a baseline level of corrosion protection for indoor and light-duty outdoor environments. This package contains 50 washers, making it practical for service technicians and maintenance crews managing recurring fastener stock.

Key Features

• Grade 8 spring steel construction with Rockwell C44 to C51 hardness for reliable locking tension
• Zinc-plated finish for corrosion resistance in standard service environments
• Inside diameter range of 12.2 to 12.7mm for proper M12 fastener fit
• Meets DIN 127 fastener standard for metric split lock washers
• 2.5mm thickness provides consistent spring deflection under load
• Pack of 50 washers for stocking and repetitive-use applications

Compatibility

Designed for use with M12 metric screws and bolts conforming to standard metric fastener dimensions. Meets DIN 127 specifications for metric split lock washers.

Installation Notes

Installation is performed by any trade professional working with metric fastener assemblies, including HVAC technicians, electricians, and mechanical contractors. Place the washer on the fastener shank before seating it against the mating surface, ensuring the split gap is not pre-compressed before torquing. Do not reuse split lock washers that have been fully flattened, as they will not provide adequate locking force. Follow applicable equipment manufacturer specifications and relevant code requirements for fastener torque values.