Boshart SS304U Stainless Steel Threaded Union, ISO4144

Boshart SS304U Stainless Steel Threaded Union, ISO4144

The Boshart SS304U is a 304 stainless steel threaded union manufactured to the ISO4144 thread standard, built for joining stainless steel threaded pipe runs in rough-in plumbing applications. Available in 3/4" and 1" trade sizes, this union allows a plumber or contractor to connect and disconnect stainless steel threaded pipe sections without cutting or re-threading the line, making service, maintenance, and future modifications far easier on stainless steel piping systems. Constructed from 304 stainless steel across both size options, this union resists corrosion in demanding commercial and industrial environments where standard steel or malleable iron fittings would degrade over time. Boshart supplies this union in cartons of 25 pieces, sized for stocking distributors and contractors running multiple stainless steel threaded joints in either 3/4" or 1" size. For best results when assembling this fitting to stainless steel threaded pipe, Boshart recommends using Gray Stainless Steel PTFE Tape together with Gray Magic Pipe Thread Compound on the mating threads, regardless of which trade size is selected.

Key Features

• Trade Size Range: Offered in 3/4" and 1" sizes to match common stainless steel threaded pipe runs.
• Durable Construction: Made from 304 stainless steel for corrosion resistance in threaded pipe assemblies.
• Standard Compliance: Manufactured to the ISO4144 thread specification for consistent, reliable threaded connections across both size options.
• Union Design: Threaded union configuration allows disconnection and reconnection of stainless steel pipe runs without cutting the line.
• Recommended Sealant Pairing: Boshart recommends Gray Stainless Steel PTFE Tape and Gray Magic Pipe Thread Compound together for joining stainless steel threaded fittings.
• Bulk Packaging: Supplied 25 pieces per pack for distributor and contractor stocking needs, in either the 3/4" or 1" size.

Technical Specifications

• Product Material: 304 Stainless Steel
• Trade Size: 3/4" - 1"
• Standards: ISO4144
• Country of Origin: China
• Packaging: 25 ea

Typical Applications

• Stainless Steel Threaded Pipe Assemblies in 3/4" or 1" Sizes
• Commercial and Industrial Rough-In Plumbing
• Corrosion-Resistant Piping Runs Requiring Serviceable Joints
• Renovation and New Construction Stainless Steel Pipe Systems
• Facilities Standardizing on a Single Stainless Steel Union Line for Multiple Pipe Sizes

Why Boshart?

Boshart builds this union from 304 stainless steel to the ISO4144 standard, giving plumbers and contractors a dependable, corrosion-resistant connection point for threaded stainless steel piping in either 3/4" or 1" sizes. Packaged 25 pieces per carton, it's a practical stocking item for professionals assembling stainless steel threaded systems where reliable, serviceable joints matter across multiple pipe diameters.