BSM Whitworth-Threaded Hexagonal Sanitary Union Nut

Six-Flat BSM Collar Geometry and Whitworth Threading

This BSM hexagonal union nut is the female threaded tightening ring for BSM/RJT sanitary pipe unions. Machined with a six-flat wrenching exterior, internal Whitworth (WHIT) female threads (column A), and an inward rear retaining flange (bore B), the nut slips over the tube end to capture a BSM weld liner shoulder and draw it against a BSM male part.

Material Options and Comparative Datasheet

The primary catalog page offers SS304 or SS316L stainless steel options and lists a 1" to 4" size range (while its Type cell prints a generic 'Clamp, Weld, Thread' string). A retained datasheet (BSMHN25–BSMHN100 in Grade 304, 1"–4", length 22.2 mm, outer dimension 48.8–128 mm) provides comparative reference data.

Tabulated Dimensions on Drawing BSM RJT HEX NUT (A, B, C)

Across the seven rows on the drawing (mm), thread A, bore B, and thickness C are: 25.4 (42.3×8TPI WHIT, B=33.3, C=22), 38.1 (54.9×8TPI, B=46, C=22), 50.8 (67.9×6TPI, B=58.7, C=22), 63.5 (80.6×6TPI, B=71.4, C=22), 76.2 (93.3×6TPI, B=84.1, C=22), 101.6 (118.7×6TPI, B=109.5, C=22), and 152.4 (169.4×6TPI, B=160.3, C=24).

Thread Diameter Checks With Mating Male Parts

The hex nut table lists thread diameters from 42.3 mm (1") to 169.4 mm (6"), whereas the companion BSM male drawing lists 45.7 mm to 174.3 mm. Verify thread major diameter and across-flats wrench size before ordering.