Hobson did you know flyer
Black UV Stable Nylon Washer-Bushing with Shoulder (Top Hat Washer): Sizes (Did You Know)
Hobson's one-page "Did You Know" flyer for its black UV stable nylon washer-bushing with a shoulder, also known as a top hat washer (part WB66USM). It lists 16 sizes with inner and outer diameter, width, thickness and shoulder height.
What this covers
- Sizes
- Applications
- Features
- UV resistance
For Flat Washer.
Key things to remember
The essentials from this document in plain words. Check the full document before you rely on a figure.
- Black nylon washer with a shoulder (top hat washer), UV stable for outdoor use.
- Used where a fastener has to be insulated from the base material.
- Inner diameters from 5.1 to 20.5mm, with shoulder heights from 5 to 25mm.
- Example sizes: WB66USM06013 is 6.0mm ID, 9.0mm OD, 17.0mm wide, 1.5mm thick, 13mm high; WB66USM12313 is 12.1mm ID, 14.8mm OD, 26.6mm wide, 2.0mm thick, 13mm high.
- Largest size WB66USM20025: 20.5mm ID, 22.2mm OD, 36.3mm wide, 3.0mm thick, 25mm high.
- UV light makes non-resistant surfaces fade, discolour, break down and go brittle; this washer is made to resist it.
Who it helps: Anyone isolating a bolt or screw from the material it passes through, especially outdoors.
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This document is published by Hobson Engineering, who supply this range to us. We show it here in full so you can read it next to the product; the summary above is ours. Read it on this page or download the PDF. For the most current version, ask us.