RTC3748 - Lock Nut

- €1,50

€1,50

€1,50 - €1,50

€1,50

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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 Allmakes OE

Lock Nut is a captive plastic fastener (commonly known as a Lokut nut) that receives a No. 10 self-tapping screw.

The body pushes into a square panel aperture (7 mm) where its shoulders grip to hold it captive, presenting a threadless tapping bore that the screw cuts into as it drives home. It is used to secure trim and mechanism components such as door window regulators, facia panels and tailgate trim, allowing a screw fixing into thin sheet or moulded panels without a separate backing nut.

Vehicle Model Land Rover Defender up to 2016
Range Rover Classic 1994-2001 (P38)
Land Rover Series 2 and 3

Fitment Notes SERIES II/III 1958-1985 — lock nut
DEFENDER 1983-2016 — lock nut: door window regulator, upper facia
RANGE ROVER P38 1994-2001 — lock nut: lower tailgate

Alternative Codes

RTC3748

In stock 59 units

44 · Gouda 15 · 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 0 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What is the RTC3748 lock nut and how does it work?

The RTC3748 lock nut is a captive plastic fastener, often called a Lokut nut, that receives a No. 10 self-tapping screw. It pushes into a 7mm square panel aperture where its shoulders grip to hold it captive, giving a threadless bore the screw cuts into. It fits Series II/III, Defender and Range Rover P38 trim.

Where is the RTC3748 lock nut used on the vehicle?

The RTC3748 secures trim and mechanism parts into thin or moulded panels. Typical uses are the Defender door window regulator and upper facia, and the Range Rover P38 lower tailgate, anywhere a screw fixing is needed without a separate backing nut.

How many RTC3748 lock nuts should I order?

Order one RTC3748 per screw fixing point. These captive nuts are small and easily lost or cracked on removal, so it's usually worth ordering a few spares when refitting a panel or regulator rather than just the exact count.