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J.W. Winco Inc. offers GN 741 and GN 742 aluminum fill/drain Pplugs with metric and BSPP parallel threads. These RoHS-compliant plugs are made of turned aluminum with a matte shot-blast finish. They are available in plain or with fill or drain symbol laser engraved.
The GN 741 types have an NBR synthetic rubber seal, while the GN 742 versions have a seal of Viton rubber. The seal is retained in a groove undercut in the mating face, which prevents it from dropping out and from extruding when the plug is tightened. For this reason, the seal can be of a softer material, which offers better sealing.
Metric pipe thread sizes from M14 x 1.5 to M42 x 2.0 are available.
Related Glossary Terms
- parallel
parallel
Strip or block of precision-ground stock used to elevate a workpiece, while keeping it parallel to the worktable, to prevent cutter/table contact.
- undercut
undercut
In numerical-control applications, a cut shorter than the programmed cut resulting after a command change in direction. Also a condition in generated gear teeth when any part of the fillet curve lies inside of a line drawn tangent to the working profile at its point of juncture with the fillet. Undercut may be deliberately introduced to facilitate finishing operations, as in preshaving.
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