RJT-15 Sanitary Welding Union Male End with Whitworth Thread in SS304 / SS316L

Component Role & RJT Male Ring-Groove Profile

The RJT-15 welding union male end forms the externally threaded half of a Ring Joint Type (RJT / BS 4825-5) sanitary pipe union. Its rear collar butt-welds to inch-OD stainless steel tubing, while its front barrel combines external Whitworth threads with a machined face groove that houses the O-section RJT elastomer ring against a mating RJT-14 liner.

Material Grades & Dual-Source Dimensional Schedules

Supplied in SS304 and SS316L stainless steel with a surface finish rated at Ra < 0.8 um in the parameter table, the RJT-15 male covers six nominal sizes from 1" through 4" (1", 1.5", 2", 2.5", 3", and 4"). The source drawing lists bore ID A from 22.2 mm to 97.6 mm, weld-end OD B from 25.65 mm to 101.85 mm, external Whitworth threads C from 45.7×1/8TWHIT (1") to 123.5×1/6TWHIT (4"), and length L2 at 27.0 mm, while secondary datasheet records (316L grade, codes RJTMP25 to RJTMP100) list axial length A at 22.2 mm.

Source Drawing Note & Ordering Guidance

Because the page embeds a generic 'Male' drawing sheet (L2 = 27.0 mm) without an explicit RJT-15 model code in the title block whereas the RJT Male Part datasheet specifies 22.2 mm length and BS 4825 Whitworth thread major diameters (41.275 mm to 117.475 mm), confirm whether your assembly follows the 27.0 mm or 22.2 mm profile when ordering replacement parts.