Metallics Washers 3/8 X 1-1/2 Fender SS

Yes. The Metallics JW117SS fender washer is sized 3/8 inch for the bolt hole with a 1-1/2 inch outside diameter, so it slips over 3/8 inch bolts and 3/8-16 threaded rod used for hanging conduit, strut and pipe. The wide 1-1/2 inch face is the whole point of a fender washer: it spreads the clamp load far beyond what a standard 3/8 flat washer covers.

They are stainless steel, so corrosion resistance is far better than plain or zinc plated washers. That makes them a reasonable choice for exterior conduit runs, rooftop equipment, cooling tower areas and damp mechanical or boiler rooms where a plated washer rusts and stains.

Each jar holds 50 washers. Metallics ships it as a jar pack, which is the practical count for a van stock item rather than a bulk box.

Metallics lists it for electrical, plumbing, heating and air conditioning work. In practice it goes under nuts on 3/8 rod hangers, through oversized or slotted holes in strut and sheet metal, and anywhere a standard washer would pull through thin material such as a panel wall, duct or deck.

Use the fender washer when the hole is oversized, slotted, or in thin or soft material, or when you need to spread load over a larger footprint. The 1-1/2 inch outside diameter gives roughly four times the bearing area of a typical 3/8 flat washer, which is around 7/8 inch across. For a clean, correctly drilled 3/8 hole in steel, a standard flat washer is the simpler pick.

JW117SS is the Metallics part number for the 3/8 x 1-1/2 stainless fender washer in a jar. Order against that number and you get the same inside diameter, outside diameter and material every time, which matters when you are mixing stainless hardware and want to avoid putting a plated washer into a stainless assembly.

The jar comes in at 1.36 lbs, in a package measuring 3 x 3 x 2.7 inches. Light enough to keep several sizes on the truck without eating payload.