TD Russia Castle Nut for AR-Pattern Stock Tubes
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TD Russia Castle Nut for AR-Pattern Stock Tubes
Genuine TD Russia | Six wrench notches | Black finish
In short: a replacement castle nut for AR-pattern stock tubes - the ring that locks the receiver end plate and keeps the tube from backing out under recoil.
Overview
The castle nut is the part that stops an AR-pattern stock tube unscrewing itself. It threads on behind the end plate and is staked or torqued down against it; if it loosens, the end plate rotates, the takedown detent spring escapes, and the stock starts to wobble. A worn or rounded nut is worth replacing rather than persuading.
This one has six wrench notches cut around the rim so a castle nut wrench - or the wrench face on the IOS Ekventor multi-tool - gets a square bite from any angle. It is finished in black to match standard hardware.
What's in the Box
| ✓TD Russia castle nut | x 1 |
Compatibility: AR-pattern stock tubes. Turned with a castle nut wrench or the wrench face on the IOS Ekventor multi-tool.
Key Advantages
- Replaces a worn or rounded castle nut
- Six wrench notches - a square bite from any angle
- Locks the receiver end plate so the tube cannot back out
- Turns with a standard castle nut wrench
- Black finish to match standard hardware
Technical Specifications
| Brand | TD Russia |
| Type | Castle nut |
| Fits | AR-pattern stock tubes |
| Wrench notches | 6 |
| Colors | Black |
| MPN | TDR-CASTLE-NUT |
| Condition | New |
Frequently Asked Questions
What does a castle nut do?
It locks the receiver end plate so the stock tube cannot unscrew under recoil.
When should I replace mine?
When the notches are rounded off, or the nut no longer holds torque against the end plate.
What tool turns it?
A castle nut wrench, or the wrench face on the IOS Ekventor multi-tool.
How many notches does it have?
Six, so a wrench engages from any angle.
Does it fit standard tubes?
Yes, it is cut for AR-pattern stock tubes.
Is this a genuine TD Russia part?
Yes - it is an original TD Russia castle nut with guaranteed US delivery.
Related products: IOS Ekventor pII Multi-Tool | TD Russia KeyMod Insert Nut | TD Russia M-LOK Insert Nut
Genuine TD Russia castle nut - six notches, no rounding.
In Stock | Guaranteed US Delivery | Genuine TD Russia Part
Related: IOS Ekventor pII Multi-Tool | TD Russia KeyMod Insert Nut | TD Russia M-LOK Insert Nut
In Stock | Guaranteed US Delivery | Genuine TD Russia Part
Related: IOS Ekventor pII Multi-Tool | TD Russia KeyMod Insert Nut | TD Russia M-LOK Insert Nut
General
Type
Castle nut
Brand
TD Russia
Manufacturer Part Number (MPN)
TDR-CASTLE-NUT
Condition
New
Intended Use
Locking an AR-pattern stock tube end plate
Material
Steel
Color / Finish
Black
Operating Temperature
AR-pattern stock tube
Mounting & Rails
Function
Castle nut
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