RS Components
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M12 Plain Nylon Tap Washer, 2.5mm Thickness

Temporarily out of stock - back order for despatch 05-01-2021, delivery within 1 working days
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Unit of sale 1 Bag of 50


(exc. VAT)


(inc. VAT)



RS Stock No.:
COO (Country of Origin):
Bag(s)Per BagPer unit*
1 - 4€5.53€0.111
5 - 9€5.25€0.105
10 - 29€4.98€0.10
30 +€4.64€0.093
*price indicative

RS PRO Nylon 6.6 - Metric Washers

RS PRO range of plain, white, nylon tap sealing washers in sizes M2 to M12 which are designed to distribute the force of the screw head of a screw or nut on a larger surface. These nylon washers provide an excellent inexpensive solution between gland and equipment with electrical insulation and good chemical resistance. They are also non-abrasive and lightweight in comparison to metallic washers and absorb shock and noise better resulting in less noise when used in equipment.

Tap washers are a thin disk with a hole in the middle that is designed to even out an uneven surface so that the fastener can be securely attached to the surface. They can be made out of various materials such as rubber, fibre, ceramic, these RS PRO sealing washings are made from nylon.

Washer options include the following sizes:

528-154 - M2
528-160 - M2.5
525-739 - M3
525-745 - M4
525-751 - M5
528-176 - M6
280-521 - M8
280-537 - M10
280-543 - M12

Features and Benefits:

Metric plain sealing washers Nylon 6.6, natural
Provides electrical insulation
Ideal for use as a bearing surface
Good chemical resistance
Different sizes available
Nylon 6.6 exhibits a great deal of strength and resistance to temperature extremes - ideal for chemical and electrical applications
Can withstand a good deal of wear and tear and movement without becoming damaged or compromised

Product Application Information

Tap washers are also known as sealing washers and are designed to prevent leakage and contamination. Tap washers are ideal for plumbing applications to provide durable and reliable seals.

These washers can also be used in various ways from distributing the load of a threaded fastener, as a bearing surface or spacer. Industries that use nylon washers include:
Oil and gas


Why would I need to replace a tap washer?
If your tap is dripping, no matter how much you tighten the tap then there is a good chance that the tap washer is worn or damaged and needs replacing. Tap washers are prone to wear and tear and when they are worn it allows a small amount of water through which drips from the tap.

RS PRO is our own brand range and brings you a wide range of high-quality, great value products offering you more choice. Trusted by engineers all over the world, every part of every RS PRO product has been rigorously tested against demanding industry standards; they’re only given the RS PRO seal of approval if we’re confident of their exceptional quality, which means you can be confident too.


528-154, 528-160 and 528-176 do not comply with any DIN Standard

For Screw/Bolt SizeM12
Outside Diameter24mm
Inside Diameter13mm