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M22 (7/8") x 39mm x 3mm Natural Nylon Flat Washers HEC Standard
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| Buy 1 | Buy 1 | $8.00 each | $8.00 | - |
| Buy 2 + | Buy 2 - 4 | $6.50 each | $13.00 | 18.75% |
| Buy 5 + | Buy 5 - 9 | $5.80 each | $29.00 | 10.77% |
| Buy 10 + | Buy 10 - 19 | $5.00 each | $50.00 | 13.79% |
| Buy 20 + | Buy 20 - 29 | $4.20 each | $84.00 | 16.00% |
| Buy 30 + | Buy 30 - 49 | $3.60 each | $108.00 | 14.29% |
| Buy 50 + | Buy 50 - 74 | $2.60 each | $130.00 | 27.78% |
| Buy 75 + | Buy 75 - 99 | $2.40 each | $180.00 | 7.69% |
| Buy 100 + | Buy 100 + | $2.30 each | $230.00 | 4.17% |
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In Stock
Other Sizes in Range
Delivery Information
Orders under $30 (Bulky items sent as parcel for FREE)
- Aust Post UNTRACKED Letter – FREE
- Parcel – From $8
- Express – From $10
- Click and Collect – 2hrs
Orders over $30
- Parcel – FREE
- Express – From $10
- Click and Collect – 2hrs
5% Off
10% Off
15% Off
| System of Measurement | Metric |
|---|---|
| Product | Flat Round Washer |
| Industry Size | M22 x 39 x 3 |
| Size | M22 (22mm) |
| To Suit Fastener Size | M22 | 7/8" |
| Corrosion Protection Level | Excellent |
| Material | Nylon |
| Finish | White |
| Inside Dimension (id) | 23.00 - 24.00mm |
| Outside Dimension (od) | 38.00 - 39.00mm |
| Thickness (t) | 2.70 - 3.10mm |
| Are they Magnetised? | No |
| Dimensional Data | Provided as a guide, subject to change |
| Standard Made To | HEC Standard |
| Brand | Hobson Engineering |
Dimensional data is a guide only. Tolerance differences exist between brands and batches
About Flat Round Washers
Flat Round Washers spread bolt or nut clamping load over a wider bearing area than the bolt head alone, protect the work face from rotation marks during install, and bridge slightly oversized or imperfect holes. The default washer for almost every bolted joint. Supplied across the full BNA range of finishes (stainless A2 and A4, zinc plated, galvanised, brass, nylon) to HEC Standard, DIN 9021 (large OD / fender) and other variants.
Recommended use Electrical assembly (non-conductive), food and pharmaceutical equipment, marine fittings where weight matters, and any application that needs chemical or electrical insulation. Not for high-load structural use; nylon has lower tensile strength than carbon or stainless steel.
Washers are named by the bolt they fit: an M10 washer suits an M10 bolt. The inside diameter is slightly larger than the bolt so it slides on. Our guide covers every size and washer type we stock.
Measure the inside diameter (ID), outside diameter (OD) and thickness, as shown in the drawing.
Frequently Asked Questions
Nylon is non-conductive, non-magnetic and chemically resistant. Common in switchgear, control panels, light marine fittings, low-load joinery and any joint that must not corrode galvanically against an aluminium or stainless mating part.
This is the main reason nylon is specified in electrical and MRI/sensor applications. Carbon-steel and stainless fasteners would interfere; nylon does not.
Nylon is hygroscopic. It absorbs water from the surrounding environment, which acts as a plasticiser, reducing tensile strength and stiffness while increasing elongation. For permanent wet or marine service, use a metallic fastener rated for the environment.
Polymer fasteners have very different strength characteristics from steel. Refer to the Material & Coating section above for tensile, wear and hygroscopic notes. For load-bearing applications consider a metal fastener instead.
The standard defines the head and thread geometry. Mechanical properties for nylon are not defined by the standard; refer to the supplier (Hobson) product guide.
The specs table directly above this description lists the drive type and across-flats (AF) size for this product.
Pick nylon when electrical insulation or chemical resistance matters more than strength. Pick brass when conductivity is needed. Pick stainless when load-bearing strength + corrosion resistance is needed.
Material & Coating
Nylon PA 6.6 (also called polyamide 66) is the standard engineering polymer used for non-metallic fasteners. Nylon fasteners are non-conductive, non-magnetic, lightweight and chemically resistant. Most commonly supplied as Hobson-brand in the BNA range.
Important Nylon is hygroscopic. It absorbs water from the surrounding environment, which softens the material over time and reduces tensile strength. For wet or high-humidity service consider this in the design margin.
Benefits of Nylon
- Provides good toughness, tensile strength, non-conductive and resistance to creep, particularly in the high temperature range.
- Excellent wear properties, low coefficient of friction and exceptional chemical resistance to aromatic hydrocarbons, greases and oils.
- Nylon is a hygroscopic material which tends to absorb water or moisture from the surrounding environment. The amount of absorption will depend on the environmental conditions. When water or moisture is absorbed by Nylon, it behaves like a plasticizer in plastics, reducing the tensile strength and stiffness, and increasing elongation, impact strength and energy-absorbing characteristics.
- Nylon will perform well in long-range service in most applications.
Class Strength data for this material is in the Material & Coating section above.
How to Order the Right Size Washer
Washer sizing Washer sizes can be confusing, so here is the quickest way to find the right one. If you already have a bolt or screw, match the bolt size: an M6 bolt takes an M6 washer, M10 takes M10, and so on. Look for the size at the start of the description (e.g. 'M6 Flat Round Washer').
If you only have a loose washer to match, measure the inside diameter and pick the next size down. The washer's inside is always slightly larger than the matching bolt so it slides on freely. For example, an inside measurement of approximately 6.50mm means you need an M6 washer; 17.25mm means you need an M16 washer.
The outside diameter is measured outside-to-outside. Thickness varies between batches - washers are not precision-made fasteners and slight variations are normal. All published measurements on this site should be used as a guide only.
Need every size? See our full washer gauge sizing chart for the complete SWG range (8g to 24g) in mm and inch.
Resources
For full technical data including key product information, range and a CAD drawing, see our Technical PDFs library.
Convert between metric and imperial sizes, gauge to mm, decimal to fraction and TPI to pitch with our measurement conversion calculators.
Pricing & Delivery
Includes GST, a Tax Invoice and Free Standard Delivery anywhere in Australia.
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Technical data Researched and compiled from numerous industry sources for the sole purpose of providing basic information. All material is advisory only and its use by anyone is entirely voluntary. Reliance on it for any purpose by anyone is at the sole risk of that person, and Bolt and Nut Australia is not responsible for any loss, claim or damages arising therefrom. In developing this information, Bolt and Nut Australia has made a determined effort to present it accurately.
Measurements Sizes are taken from supplier catalogues or hand-measured and should be used as a guide. Minor variation between batches is normal. Stock is sourced from various suppliers, so differences may exist between batches in markings, appearance or finish.
Product Photos & PDF Data Sheets Represent the product type, not exact size. PDFs are a reference guide only. Specifications may change without notice.
If you see any problems with any of our specifications or you require additional information please contact us.
Delivery
Weigh less than 500grams
Exceptions: Tools, Kits, Bulky items = Sent as a parcel with tracking
Small orders that fit into the slot of your Letterbox are sent:
FREE with Aust Post Letter delivery with NO TRACKING and delivery between 4-12 business days
Or
Select a Quicker delivery service
- $7.00 Parcel Delivery 2-7 business days
- From $12.00 Express Delivery 1-4 business days
- From $14.00 StarTrack PREMIUM Express Delivery 1-3 business days
Or
Click & Collect - Warehouse pickup
Unit 9, 93 Rivergate Place, Murarrie, QLDPlace your order online and we will have it ready within 2 hours. Call if required sooner
Pickup times between 8am - 4pm, Monday - Friday
Weigh more than 500grams
Included is orders under $30 but weigh more than 500grams or wont fit in the slot of your letterbox
Including Large and Bulky heavy orders are sent:
FREE as a Parcel Delivery WITH TRACKING and delivery between 2-7 business days
Or
Select an Express delivery service
- From $12.00 Express Delivery 1-4 business days
- From $14.00 StarTrack PREMIUM Express Delivery 1-3 business days
Or
Click & Collect - Warehouse pickup
Unit 9, 93 Rivergate Place, Murarrie, QLDPlace your order online and we will have it ready within 2 hours. Call if required sooner
Pickup times between 8am - 4pm, Monday - Friday
Further delivery information can be found on our Delivery page
Supplier Details
| MPN | WR66PM220390030 |
| UPC | 9350629174318 |
