interrupted screw

(redirected from Interrupted thread)
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interrupted screw

[′int·ə‚rəp·təd ′skrü]
(design engineering)
A screw with longitudinal grooves cut into the thread, and which locks quickly when inserted into a similar mating part.
References in periodicals archive ?
The barrel extension pinned to the chamber end contains the interrupted threads that mate with the angled lugs on the bolt head.
Most takedown rifles use an interrupted thread system, but interrupted threads can wear out over time," says Dobler.
Those full threads also handle the rigors of disassembly much better than the old interrupted threads.
With the interrupted thread method, portions of the circumference of both barrel and receiver have no threads.
Roden's actions are available in right- or left-handed patterns, and he's even making some interrupted thread, takedown actions for a well-known European firm.
Also note the mag tube, like the barrel, has interrupted threads that must be disengaged before either can be withdrawn from their shared block.
M2A1 barrels have interrupted threads on the receiver side of the barrel, a barrel lock pin (or lug), and a carrying handle assembly.
This extension contains three floating steel rings in a machined recess, which act as a seal to help prevent debris from coming back into the interrupted threads and gumming up the works.
An obvious problem with this design would be powder fouling getting into the gaps of the interrupted threads and locking the breech in place.