Gibraltar Z8814 Extra Thick Flat Washer M14 Black Oxide

Product Description

The GIBRALTAR Z8814 is an extra thick flat washer designed for M14 screw applications where added load distribution and bearing surface are required. Manufactured from 1010 case-hardened steel with a black oxide finish, this washer delivers improved surface hardness and moderate corrosion resistance in a compact metric profile. It measures 15 mm inside diameter by 25 mm outside diameter with a 3 mm thickness, making it notably heavier-duty than standard flat washers. Licensed contractors, millwrights, and maintenance technicians install this fastener hardware in structural, mechanical, and equipment-mounting assemblies.

This washer is suited for bolted connections in residential and commercial construction, industrial equipment fabrication, and general mechanical assembly where an M14 fastener requires a wider bearing surface to prevent pull-through or surface damage. The extra thickness provides additional rigidity under clamp load compared to standard DIN 125 or SAE flat washers. It is particularly useful in applications involving softer base materials or oversize clearance holes where a thicker washer maintains consistent joint integrity.

Key Features

• Extra thick 3 mm profile provides greater bearing surface and load distribution than standard flat washers
• Case-hardened 1010 steel construction for improved surface hardness and resistance to deformation under load
• Black oxide finish offers moderate corrosion resistance and a low-reflectance appearance
• Metric sizing: 15 mm inside diameter, 25 mm outside diameter for M14 fasteners
• Lightweight at 0.05 pounds per unit, suitable for high-count hardware kits

Compatibility

Designed as an OEM-style replacement or aftermarket flat washer for M14 metric fastener assemblies in structural, mechanical, and industrial applications.

Installation Notes

Installation is performed by licensed contractors, millwrights, or qualified maintenance technicians as part of a bolted fastener assembly. Power down or de-energize any equipment before disassembling fastened joints in live mechanical systems. Use appropriate torque specifications from the equipment manufacturer or applicable structural standard for the fastener size and joint material. Inspect the washer seating surface for burrs or debris before assembly to ensure even load distribution.