BSM Butt-Weld Whitworth-Threaded Sanitary Union Male Part

Externally Threaded Male Body and Seal Groove Profile

This BSM welded male part is the externally threaded half of a BSM/RJT sanitary tube union. One end provides a plain butt-weld neck (bore A, tube OD B), while the enlarged head features external Whitworth (WHIT) threads (column C) and a deep annular face groove that seats the union O-ring against the mating BSM liner nose.

Materials, Surface Roughness, and Reference Datasheet

The primary catalog page specifies wrought AISI 304 and AISI 316L (SS304 / SS316L) options with an internal surface roughness of Ra < 0.8 μm across 1" to 4", while the embedded drawing header prints cast 316 code 'CF8M'.

Tabulated Dimensions on Drawing BSM RJT MALE PART (A, B, C, D)

Across the seven rows on the primary drawing (mm), bore A, tube OD B, Whitworth thread C, and constant height D = 26.8 mm are: 25.4 (A=22.2, B=25.4, C=45.7×8TPI WHIT), 38.1 (A=34.9, B=38.1, C=58.4×8TPI), 50.8 (A=47.6, B=50.8, C=72.7×6TPI), 63.5 (A=60.3, B=63.5, C=85.4×6TPI), 76.2 (A=73, B=76.2, C=98.1×6TPI), 101.6 (A=97.6, B=101.6, C=123.5×6TPI), and 152.4 (A=149.2, B=152.4, C=174.3×6TPI).

Axial Length and Thread Compatibility Checks

Note that the RJT-style grooved male drawing specifies axial height D = 26.8 mm across all sizes, whereas the flat-shouldered BSMMP datasheet lists length C = 22.2 mm. Confirm groove profile, overall length, and thread diameter before ordering.