NY605042 - Self-Locking Nut – 5/16" UNF – 1/2" AF

- €0,40

€0,40

€0,40 - €0,40

€0,40

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OEM: Made by an Original Equipment Manufacturer. This part is made by an original equipment manufacturer or under their license, ensuring compatibility and quality.

Brand PR2 Allmakes OE

Self-Locking Nut with a 5/16" UNF thread and a 1/2" across-flats hexagon.

The self-locking action resists loosening under vibration, retaining clamp load without the need for a separate lock washer. A general-purpose imperial-threaded fastener.

Vehicle Model Land Rover Defender up to 2016
Land Rover Discovery 1 1989-1998 (L318)
Range Rover Classic up to 1994
Land Rover Series 2 and 3

Fitment Notes SERIES II 1958-1961 — 2.0 Diesel engine
SERIES II/IIA 1958-1971 — 2.25 Petrol engine
SERIES IIA 1961-1971 — 2.25 Diesel engine

Alternative Codes

NY605041LNY605042252161BR 0520GHF222

In stock 278 units

265 · Gouda 13 · Drachten

Express delivery available

When will my order arrive?

Order before 15:00 (Mon–Fri): same-day dispatch for in-stock items.
UPS Express (order before 14:00): dispatched today, delivered tomorrow where available.
Netherlands / Belgium / Germany: 2–4 working days.
Other EU countries + UK: 4–8 working days.
Outside EU/UK: delivery times vary — contact us for an estimate.

Items may ship from multiple warehouses at no extra cost.

Job kits containing this part

This part is included in 1 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What is the NY605041L self-locking nut used for?

The NY605041L is a 5/16 inch UNF self-locking nut with a 1/2 inch across-flats hexagon. Its self-locking action resists loosening under vibration and holds clamp load without a separate lock washer. It's a general-purpose imperial fastener used across classic Land Rovers like the Series 2 and 3, Discovery 1 and Range Rover Classic.

Can this self-locking nut be reused or should it be replaced?

Replace it. Self-locking nuts like this typically lose their grip once they've been run onto a bolt, because the locking feature wears as the nut is tightened and removed. Fitting a new nut each time keeps the vibration resistance that stops the joint working loose.

What thread does the NY605041L nut have?

The NY605041L has a 5/16 inch UNF thread with a 1/2 inch across-flats hexagon, so it needs a 1/2 inch AF spanner or socket. Being an imperial UNF fastener, it won't fit metric studs or bolts, which matters on older Land Rovers that mix imperial and metric threads.