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Matching nuts and washers in the same size, grade and thread as this washer.

M30 Single Tab Washer DIN 93 A2 Stainless Steel

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Nyloc insert lock nut, DIN 985, stainless steel M30 Nylon Insert Nut DIN 985 A2 Stainless Steel

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This M30 single tab washer is manufactured to DIN 93 in A2 stainless steel (304 grade). DIN 93 specifies a washer with one tab that is bent up against the nut flat, for a positive mechanical lock that cannot vibrate loose. Once the nut is tightened the tab is bent against a flat, physically blocking rotation rather than relying on friction.

Typical applications

  • Marine shaft and propeller nuts
  • Machinery subject to heavy vibration
  • Bearing retaining nuts
  • Safety-critical mechanical assemblies

Available in packs of 10 to 50, with free next-day UK delivery on orders over £50 and 30-day no-quibble returns. For coastal, marine, or chloride-rich environments, Simfix A4 (316 grade) equivalents are available.

*Photos, diagrams and other images are for illustration only and may not show the exact item supplied. Simfix reserves the right to alter or replace any photo, diagram or image at any time at its sole discretion.

**Orders that cannot be split will be rounded up to the next full pack or box quantity.

Simfix reserves the right to change quantities, stock levels and prices at any time. We accept no liability for the accuracy of dimensional data, DIN/ISO references, technical data, customs tariff codes or EAN barcodes.

Fastener styleSingle tab washer
StandardDIN 93
MaterialA2 stainless steel (304)
Property classA2
Thread sizeM30
Surface finishPlain (no plating)
Recommended useWorkshop

RoHS and REACH compliant.

How do I choose between A2 and A4 stainless steel?

A2 (304) stainless steel suits most indoor, outdoor and workshop jobs. Choose A4 (316) marine grade for coastal, marine, poolside or other chloride-rich environments.

How do I make sure I order the right size?

Check the size in the product title and the standard, material and dimensions in the Product Specification tab. In M8 x 30, M8 is the thread diameter and 30 is the length in millimetres. See our size guide if you need more help.

When will my order arrive?

Orders placed before 3:30pm Monday-Friday are typically dispatched the same working day and every order is tracked. Next-day delivery is free over £50, or £5.50 below that threshold. Full options are shown at checkout.

What if I order the wrong item?

Email contact@simfix.com within 30 days of delivery with your order number. We will help arrange a refund or replacement. See our refunds information for the full process.

Is checkout secure?

Yes. Checkout is protected by SSL encryption and payments are processed through Shopify's secure checkout and supported payment providers. Simfix does not store your full card details.

  • Free next-day delivery over £50

  • Orders Before 3:30pm Ship Today

  • Secure SSL Checkout

  • No-Return Refunds