Screwed Stainless Steel Pipe Fittings
If you have a job that requires a specific screwed pipe fitting, you're pretty much guaranteed we'll have it here at BES. Our range includes BSP elbows, nipples, sockets, unions, bushes, tees, crosses, blanking fittings, locknuts and hose tail adaptors in sizes for domestic, commercial and industrial applications.
Shop for the parts you need and see if your order qualifies for free delivery. With over 15,000 products in stock right now, you can rest assured that any screwed fittings you need can make their way to you in no time at all. It’s what makes shopping with BES convenient and simple.
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All The Screwed Stainless-Steel Fittings You'll Ever Need
Our screwed fittings are manufactured from 316 stainless steel and include options suitable for natural gas, LPG, hot and cold water and other compatible services. Each product page will allow you to check for its connection, pressure rating and intended application.
Stainless Steel Nipples
Nipples connect two female-threaded pipes or fittings. Our extensive range includes equal and reducing hexagon nipples, parallel nipples, barrel nipples, extended nipples and welded nipples, with selected products available in sizes from 1/4" up to 12".
Stainless Steel Elbows
Screwed stainless steel elbows change the direction of pipework without bending the pipe. Choose from standard 90° elbows, 45° elbows and 90° street elbows in sizes from 1/8" to 4". Standard elbows have female BSP connections at both ends, while a street elbow combines male and female connections. Products include the Screwed Stainless Steel 90° Elbow – 1" BSP and the Screwed Stainless Steel 90° Street Elbow 1" BSP TM.
Hexagon Bushes
Hexagon reducing bushes connect a smaller male-threaded component to a larger female-threaded fitting. Their compact form makes them useful where there is limited room for a separate reducing socket and nipple. The range covers numerous BSP size combinations, including the Screwed Stainless Steel Hexagon Reducing Bush 3/4" x 1/2".
Reducing Sockets
Reducing sockets join two male-threaded components of different sizes. Both ends have female BSP connections, providing a straightforward way to reduce pipe size within a threaded installation. Sizes range from small reductions such as 1/4" x 1/8" to larger 4" fittings. A common option is the Screwed Stainless Steel Reducing Socket – 1" x 1/2" BSP.
Half Sockets
Half sockets provide a compact female BSP connection and are shorter than full sockets. They are commonly used where a threaded outlet needs to be added to suitable pipework, vessels or fabricated components.
The range includes the Screwed Stainless Steel Half Socket – 1/2" BSP, with sizes available from 1/8" to 4".
Cone Seat Unions
Cone seat unions allow sections of threaded pipework to be disconnected without rotating or dismantling the adjoining pipes. This makes them useful around valves, pumps and equipment that may require future servicing or replacement. Our female BSP union range includes the Screwed Stainless Steel Cone Seat Union 1" BSP F, with sizes from 1/8" to 4".
Full Sockets
Full sockets join two equal-sized male BSP threads in a straight line. Their longer body provides more threaded engagement than a half socket, making them a standard choice for joining threaded pipe and fittings.
Options include the Screwed Stainless Steel Full Socket – 1" BSP, with sizes from 1/8" to 4".
Hexagon Blanking Caps
Hexagon blanking caps close the end of a male BSP thread. The external hexagonal body provides flat surfaces for tightening and removal with a suitable spanner. Choose from sizes between 1/8" and 4", including the Screwed Stainless Steel Hexagon Blanking Cap – 1".
Hexagon Blanking Plugs
Hexagon blanking plugs close an unused female-threaded opening. They have a male BSP thread and hexagonal head, making them suitable for blanking outlets that may need to be reopened later. The range includes the Screwed Stainless Steel Hexagon Blanking Plug – 1" and sizes from 1/8" to 4".
Hexagon Locknuts
Hexagon locknuts secure compatible threaded components through panels, tanks and other suitable surfaces. They can also be used to lock the position of a threaded fitting where the installation design permits.
Available options include the Screwed Stainless Steel Hexagon Locknut 1" BSP F.
Round Blanking Caps
Round blanking caps provide a female-threaded closure with a smooth, rounded external profile. They are useful where a less prominent finish is preferred over a hexagonal cap. The range includes the Screwed Stainless Steel Round Blanking Cap 1" BSP F and sizes from 1/8" to 4".
Square Head Plugs
Square head plugs close female BSP outlets and provide a raised square head for tightening or removal. They are a practical alternative to hexagon blanking plugs where a square-head pattern is preferred. Options include the Screwed Stainless Steel Square Head Plug 1" BSP TM.
Stainless Steel Tees
Equal tees divide a pipe run into two directions or combine flow from two branches. All three female BSP connections are the same nominal size. Our range covers sizes from 1/8" to 4", including the Screwed Stainless Steel Equal Tee – 1" BSP F.
Stainless Steel Crosses
Equal crosses provide four female BSP connections of the same size. They are used where pipework needs to continue in several directions from one central fitting. Choose from sizes between 1/4" and 4", including the Screwed Stainless Steel Equal Cross – 1" BSP.
Hose Tail Adaptors
Hose tail adaptors connect suitable flexible hose to female-threaded pipework or equipment. The male BSP thread connects to the system, while the ribbed tail helps retain a correctly sized hose when used with an appropriate hose clip or clamp. Our selection includes the Screwed Stainless Steel Hose Tail Adaptor 1" BSP TM and sizes from 1/4" to 4". Check the hose material, internal diameter, pressure and fluid compatibility before assembly.
Choosing The Correct Screwed Fitting
Before ordering, check the required fitting type and direction, the BSP thread size, whether it is a male or female connection, whether it is equal or reducing dimensions, the fluid or gas compatibility, and the space available for installation and tightening.
BSP sizes are nominal pipe sizes and do not match the measured outside diameter of the thread. Measure the thread carefully and compare it with the BSP dimensions shown on our individual product pages.
316 vs 304 Stainless Steel Fittings
The screwed fittings in this category are manufactured from 316 stainless steel. Both 304 and 316 grades provide corrosion resistance, but 316 contains molybdenum, giving it improved resistance in many environments involving moisture, chemicals or chlorides.
The correct material still depends on the fluid, temperature, pressure, cleaning products and installation environment. Stainless steel is corrosion-resistant rather than completely corrosion-proof.
Installing Screwed Stainless Steel Fittings
Use a jointing method suitable for the application and thread type. Keep threads clean, avoid cross-threading, and support the pipework so its weight does not strain the fitting. Stainless steel threads can be susceptible to galling if assembled dry or overtightened. Use a compatible thread sealant or tape where appropriate, and tighten with correctly sized tools. Gas work must be completed and tested by a suitably qualified Gas Safe registered engineer.
The Right Steel Fittings For Your Needs
Making BES your one-stop shop for all your steel pipe fittings needs is a no-brainer. Our range includes all the essentials you may need, as well as specialised fittings.
View our full range of stainless steel fittings, with next-day delivery on a host of screwed, flexible, compression, tube, or press-fit fittings.
Quick Delivery On New Screwed Steel Fittings
Found the fittings you need? You'll notice that each product page has a clock showing how much time is left for next working day's Mainland UK delivery. If you're ordering from elsewhere, we suggest checking the relevant information in our delivery information section here.
If you have any questions about the screwed BSP fittings we currently have available, or need help sourcing a specific fitting, give us a call today on 0800801090.
FAQs
What are screwed stainless steel fittings?
Screwed fittings use threaded connections to join, branch, reduce, redirect or close pipework. They can usually be assembled without welding or pressing equipment.
Are these fittings BSP or NPT?
The products in this category use BSP threads. NPT and BSP threads are not directly interchangeable, even when their nominal sizes appear similar.
Are the fittings made from 304 or 316 stainless steel?
The screwed fittings in this category are listed as 316 stainless steel. Check the individual product specification where material grade is critical.
What pressure are the fittings rated for?
Many of the 150lb fittings in this range have a maximum working pressure of 10 bar. Pressure suitability can vary by fitting and application, so always check the individual product page.
Are screwed stainless steel fittings suitable for potable water?
Many products are listed for hot and cold water, but potable-water suitability must be confirmed for the complete installation, including the fitting, sealant and connected materials.
How do I make a leak-resistant threaded connection?
Check that the threads are clean, correctly matched and undamaged. Apply a suitable thread sealant where required, engage the fitting squarely, and tighten it with the correct tools without overtightening. The completed installation must be pressure- or tightness-tested using the appropriate procedure.
