Value Collection -42458-18 M18 Split Lock Washer Grade 8

Product Description

The VALUE COLLECTION -42458-18 is a metric split lock washer designed for M18 fastener applications. Made from Grade 8 spring steel with a zinc-plated finish, this washer provides resistance to loosening caused by vibration and dynamic loads. It measures 18.2 millimeters minimum inside diameter, up to 19 millimeters maximum inside diameter, with a 29.4 millimeter maximum outside diameter and a 3.5 millimeter thickness. Hardness is rated Rockwell C44 to C51, meeting Grade 8 material requirements. These washers conform to DIN 127 fastener standards and are sold in a package quantity of 50 per order.

This split lock washer is suited for general industrial, mechanical, and structural fastening applications where M18 metric bolts or screws are used. The helical split design creates spring tension when compressed under a fastener, helping to maintain clamp load. Typical installation environments include machinery assembly, equipment mounting, and fabrication work requiring metric hardware. The zinc-plated finish provides basic corrosion resistance in dry to mildly humid conditions.

Key Features

• Grade 8 spring steel construction with Rockwell C44 to C51 hardness rating
• Zinc-plated finish for basic corrosion protection
• Conforms to DIN 127 metric fastener standard
• 18.2 millimeter minimum ID fits M18 fasteners
• 3.5 millimeter thickness with 29.4 millimeter maximum outside diameter
• Sold in a package of 50 washers with a minimum order quantity of 1

Compatibility

Designed for use with M18 metric screws and bolts in applications requiring DIN 127 split lock washers. Does not meet military specifications.

Installation Notes

Install using standard hand tools appropriate for M18 metric fasteners. Place the washer between the fastener head or nut and the mating surface before torquing. Ensure the mating surfaces are clean and free of debris before installation. Follow applicable mechanical or structural assembly codes for proper fastener torque requirements.