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AS1908 - Threads, Internal profile, Preload-Locking, Specification For

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Document Number: AS1908
Project Initiation: 10-27-2009
Project Number: PE25-08-32TGA
Revision Number:
Sponsor Name: Owe Carlsson
Title
Threads, Internal profile, Preload-Locking, Specification For
Scope
This specification defines dimensional requirements for internet, preload-locking threads. The threads are designed to mate with external threads conforming to UN or UNJ Thread forms with class 2A or 3A tolerances
Rationale
The E-25 Committee at the 228th meeting decided to revive this project started in the 1980's but abandoned due to concerns of potetial patent infringements. Patents have long since run out and parts having this thread form are being produced on a regular basis.
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