Beduan 1/4
Pipe Fittings

Beduan 1/4" NPT Stainless Steel Female Bulkhead Coupler

The Beduan 1/4" NPT Stainless Steel Female Bulkhead Coupler is a reliable and durable solution for creating secure through-wall or through-panel connections in a wide range of fluid and air handling systems.

Key Features

  • Material Made from high quality 304 stainless steel for excellent corrosion resistance, durability at high temperatures, and low magnetic permeability The metal washer is not stainless steel
  • Connecting size Inner thread 1/4 inch NPT female Outer diameter 20.96 mm 1/2 inch BSP
  • Dimensions: Overall length 1 inch 25 mm Thread length 34 inch 19 mm Thread outside diameter 0 point 825 inch 20 point 96 mm
  • Use: Female coupler designed to join NPT fittings through a bulkhead
  • Maximum operating temperature range: -196℃ to 800℃ / -320.8℉ to 1472℉ Maximum operating pressure: 1500 PSI

Product Description

The Beduan 1/4" NPT Stainless Steel Female Bulkhead Coupler is a reliable and durable solution for creating secure through-wall or through-panel connections in a wide range of fluid and air handling systems. Manufactured from high quality 304 stainless steel, this coupler offers excellent corrosion resistance and maintains ductility at high temperatures, making it suitable for demanding industrial, commercial, and DIY applications. Its low magnetic permeability is ideal for environments where magnetic interference must be minimized or where non-magnetic components are preferred. Designed with a full female thread, the coupler features a 1/4" NPT female inner thread for standard pipe and fitting compatibility, ensuring an easy and secure connection with commonly used NPT components. The outer diameter of 20.96 mm is equivalent to 1/2" BSP, allowing it to fit precisely through pre-drilled holes and bulkheads designed for this size. This makes the Beduan bulkhead coupler particularly useful for tank connections, panel-mounted systems, manifolds, and custom piping layouts where a clean, leak-resistant pass-through is required. Each pack includes two bulkhead couplers, providing added value and flexibility for multi-connection setups or spare parts inventory. The included metal washer is designed to assist with proper mounting and sealing against the bulkhead surface; please note that the washer itself is not stainless steel. When properly installed, the coupler helps create a stable, vibration-resistant connection that supports long-term performance and reduces maintenance requirements. Engineered for ease of installation and dependable operation, the Beduan 1/4" NPT Stainless Steel Female Bulkhead Coupler is a smart choice for professionals and hobbyists who demand precision, durability, and compatibility in their piping systems. Whether used in compressed air lines, fluid transfer systems, or custom equipment builds, this coupler delivers consistent performance and a clean, professional installation.

Product Specifications

About This Product

Size 1/4“ NPT Female(Full Threaded)
Material Stainless Steel
Brand Beduan
Color Black, Silver
Connector Type Coupling

Technical Details

Brand ‎Beduan
Color ‎Black, Silver
Connector Type ‎Coupling
Exterior Finish ‎Brass
Thread Type ‎BSP
Number of Pieces 2
Manufacturer ‎Beduan
Part Number ‎1zf-06155-bpc
Item Weight ‎5 ounces
Package Dimensions ‎3.66 x 2.05 x 1.18 inches
Item model number ‎1zf-06155-bpc
Style ‎Pack of 2

Questions & Answers

Yes, the coupler body is made from high quality 304 stainless steel, which offers good corrosion resistance, ductility at high temperatures, and low magnetic permeability. Please note the included metal washer is not stainless steel.

The inner thread is 1/4" NPT female on both ends, and the outer diameter of the bulkhead section is 20.96 mm, which corresponds to 1/2" BSP.

Yes, this is a full female thread thru-bulk coupler with 1/4" NPT female threads running completely through the fitting.

Each pack contains 2 pieces of the 1/4" NPT stainless steel female bulkhead coupler.

It is commonly used for air, water, and many non-corrosive fluids due to its 304 stainless steel construction, but you should always verify compatibility with your specific media, pressure, and temperature requirements.

You will need a hole slightly larger than the outer diameter of the threaded bulkhead section, which is approximately 20.96 mm (about 1/2" BSP). Typically, a 21–22 mm hole is used, but confirm with your specific installation needs.

Yes, a metal washer is included for mounting, but it is not made from stainless steel. If full corrosion resistance is required, consider replacing it with a stainless steel washer of the same size.

The 304 stainless steel body offers good corrosion resistance suitable for many outdoor and light marine environments, but for highly corrosive or saltwater-intensive applications, you may want to evaluate if 316 stainless or additional protection is needed.

The product description specifies a metal washer only. No rubber gasket or O-ring is mentioned, so you may need to add your own sealing components depending on your application.

Yes, the internal threads are standard 1/4" NPT female, so it will mate with standard 1/4" NPT male fittings commonly used in plumbing, pneumatic, and fluid handling systems.

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