RS PRO Stainless Steel Lock Nut, DIN 985, M10

Bulk discount available

Subtotal (1 bag of 100 units)*

£36.47

(exc. VAT)

£43.76

(inc. VAT)

Add to Basket
Select or type quantity
In Stock
  • 195 unit(s) ready to ship
  • Plus 17 unit(s) ready to ship from another location
  • Plus 212 unit(s) shipping from 19 November 2025
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Bag(s)
Per Bag
Per unit*
1 - 4£36.47£0.365
5 - 9£34.66£0.347
10 - 29£32.84£0.328
30 +£30.64£0.306

*price indicative

Alternative

This product is not currently available. Here is our alternative recommendation.

1 Box of 10

£45.87

(exc. VAT)

£55.04

(inc. VAT)

RS Stock No.:
767-854
Brand:
RS PRO
Find similar products by selecting one or more attributes.
Select all

Brand

RS PRO

Imperial or Metric

Metric

Nut Type

Nylon Insert Self Locking Type T

Thread Size

M10

Material

Stainless Steel

Type

Nylon Insert

Stainless Steel Type

A4 316

Width

17.0mm

Overall Height

10.0mm

Standards Met

DIN 985

COO (Country of Origin):
CN

RS PRO A4 Stainless Steel Locking Nut


From the trusted RS PRO brand, these lock nuts contain a nylon insert for safe and secure fastening. They are designed to remain secure despite conditions of severe vibration. The nut is made from A4 stainless steel with a bright zinc plating, for durability and environmental resistance over a long period of use. As it is A4 graded, it is even suitable for use in challenging environments.

There are various metric sizes available:


767-804 is an M3 A4 stainless steel self-locking nut

767-810 is an M4 A4 stainless steel self-locking nut

767-826 is an M5 A4 stainless steel self-locking nut

767-848 is an M8 A4 stainless steel self-locking nut

767-854 is an M10 A4 stainless steel self-locking nut

248-4539 is an M12 A4 stainless steel self-locking nut

797-6377 is an M16 A4 stainless steel self-locking nut

797-6386 is an M20 A4 stainless steel self-locking nut

Features and Benefits


• Locking nuts for heavy-duty applications

• Glass-filled nylon inserts.

• To DIN985

• A4 grade 18/8 stainless steel (Type 316 S16)

Applications


Unlike conventional fasteners, lock nuts, sometimes known as self-locking nuts, contain a plastic insert that deforms to the thread of the fastener and prevents loosening without the aid lock threading adhesive. As such, they are often used where security in fastening is required. They are useful when joining soft materials such as wood and plastics where high surface pressure might damage the material, or when there is a short clamp load. However, their principal advantage is in applications where there is a high degree of vibration. Locking nuts resist loosening over time in dynamic load conditions. As such they are often used in;

• Domestic appliances such as washers and dryers
• Industrial machinery
• Automotive industry

How many times can a self-locking nut be used?


While a locking nut can be removed in much the same way a conventional nut can, their nylon inserts deform and degrade with each use. Therefore it is not recommended that self-locking nuts be re-used if it can be avoided, as their primary characteristic- the ability to dampen vibration and stress from dynamic loads- lessens in efficacy with each use.

How to tighten a self-locking nut?


Locknuts can be applied in much the same way as conventional nuts. It is recommended to finger tighten as much as possible, and then tighten with an appropriate tool until the required torque is reached.

Why RS PRO?


RS PRO aims to be your go-to brand for reliability and value for money. We source great parts at great prices and test everything with our in-house experts to ensure the quality you need.

When it comes to tools and fasteners, we know that versatility and dependability are what you need. As such, we stock a variety of mainstay and specialist fasteners and couplers to suit any application. Whether you're a professional electrician, plumber, builder or DIY enthusiast, RS PRO is here to support you.

Related links