CIP-Series Hex Union Nut

Hexagonal Nut Geometry and Function

This component is an individual internally threaded union nut machined with six external hexagonal flats and an inward radial collar. During assembly, the inner shoulder bears against the rear flange of a mating union liner while the internal threads draw the male end forward to compress the union seal.

Stainless Steel Material Options

The source specification lists SS304 and SS316L stainless steel options. Because the nut serves as the external mechanical fastener around the liner and male end, users can select either alloy grade to match plant washdown environments and adjacent piping hardware.

CIP and BSM Series Cross-Labeling

While the page title and standard field designate the CIP series over a 1" to 4" range, the body parameter table names a BSM Hexagon Nut and embeds a BSM Flat-Faced Hex Nut drawing covering sizes 25.4 to 152.4. Also note that the series schedule row printing Clamp, Weld, Thread is generic union-page copy; the nut itself connects solely via its internal thread.

Component Selection and Mating Checks

This listing covers the standalone hexagonal nut only and does not include a liner, male part, or gasket. Before ordering replacement nuts, verify the internal thread diameter, thread form, across-flats dimension, and shoulder bore against the existing union male end and liner.