M6 Metric Thread Adapter

Allows our 5/16" x 24 bolt knobs to be fitted any of the following rifles, which all have an M6 x 1.0mm thread on the end of their bolt handles:


 Accuracy International AE, AW and AX

Bergara B-14

Blaser R93

Blaser R8

CZ 455
CZ 457
CZ 550
CZ 557

 Lithgow LA101

Lithgow LA102
Mauser M18

Sauer 100

Sauer 101
Sauer 200 STR


This thread adapter has an internal M6 x 1mm thread and an external 5/16 x 24 TPI fine thread which is used with nearly aftermarket bolt knob available today. The M6 x 1.0mm threaded bolt handles are common with many European and rimfire rifle makes and aftermarket options for knobs for these are limited.




CNC machined from brass, this adapter won't corrode and is softer than the bolt handle steel or knob you will fit for ease of future removal. If a thread locking compound is used, we don't recommend attaching the adapter to the handle, rather epoxy the adapter to the knob.



Check first that the bolt knob has sufficient threaded length that you intend to fit this adapter to (the adapter is 0.6" / 15mm long). If necessary, the adapter can be shortened and threads cleaned up to fit. Please note that our carbon fiber 1" round knobs have an internal threaded depth of 0.47" to 0.51" (12mm to 13mm) - which requires shortening the adapter to fit. No modification is required for any of our tactical shape knobs.