Stainless Steel Threaded Fittings

Stainless steel threaded fittings are used to connect steel pipes. Tapered threads are cut into the end of the pipe, sealant is applied in the form of thread-sealing compound or thread seal tape (which is also known as PTFE or Teflon tape), and a pipe wrench is used to thread the pipe into a threaded fitting.

What are stainless steel threaded fittings used for?

Stainless steel threaded fittings are often used in buildings to convey natural gas or propane fuel, or in plumbing systems. They are a popular choice in fire sprinkler systems due to their resistance to mechanical damage and intense heat.

Threaded fittings made with stainless steel take advantage of the metal’s strength, resistance to corrosion and ease of cleaning.

Types of stainless steel threaded fittings

Different types of stainless steel threaded fittings include bulkhead adapters (used to connect tubing or piping of different sizes and configurations through a panel), nipples (used to connect two other fittings), elbows (used to connect pipes at curved angles), and tees (T-shaped fittings that accommodate three pipes).


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Description Price Connection 1 Connection 2 Length Connection 3 Fitting Type Shape Fitting Direction Thread Size 1 Thread Size 2 Thread Size 3 Connection Gender 1 Connection Gender 2 Connection Gender 3 Thread Standard 1
RS Stock No. 826-7138
BrandRS PRO
$62.07
Each
units
3/8 in R Male 3/8 in Rc Female 2.36in - Union Octagon Straight 3/8in 3/8in - Male Female - R (taper)
RS Stock No. 499-2896
BrandRS PRO
$8.85
Each
units
3/8 in G Female 3/8 in G Female 1.73in 3/8 in G Female Tee Circular Tee 3/8in 3/8in 3/8 Female Female Female G (parallel)
RS Stock No. 499-3271
BrandRS PRO
$22.30
Each
units
1-1/4 in R Male 1-1/4 in R Male 3.15in - Barrel Nipple Circular - 1-1/4in 1-1/4in - Male Male - R (taper)
RS Stock No. 826-7018
BrandRS PRO
$88.22
Each
units
1-1/2 in Rc Female 1-1/2 in Rc Female 3.11in - Coupler Circular Straight 1-1/2in 1-1/2in - Female Female - Rc (taper)
RS Stock No. 826-7113
BrandRS PRO
$105.38
Each
units
1-1/4 in Rc Female 1-1/4 in Rc Female 2.8in - Union Decagon Straight 1-1/4in 1-1/4in - Female Female - Rc (taper)
RS Stock No. 499-3546
BrandRS PRO
$11.75
Each
units
1 in R Male 3/4 in G Female 1.06in - Bush Hexagon - 1in 3/4in - Male Female - R (taper)
RS Stock No. 499-3423
BrandRS PRO
$18.14
Each
units
3/8 in G Female 3/8 in G Female 1.48in - Union Octagon Straight 3/8in 3/8in - Female Female - G (parallel)
RS Stock No. 826-7116
BrandRS PRO
$74.40
Each
units
3/4 in Rc Female 3/4 in Rc Female 2.24in - Union Octagon Straight 3/4in 3/4in - Female Female - Rc (taper)
RS Stock No. 826-6992
BrandRS PRO
$9.26
Each
units
1/4 in Rc Female 1/4 in Rc Female 1.38in - Coupler Circular Straight 1/4in 1/4in - Female Female - Rc (taper)
RS Stock No. 826-6914
BrandRS PRO
$14.62
Each
units
1/4 in G Female 1/4 in G Female - - Elbow Circular 90° 1/4in 1/4in - Female Female - G (parallel)
RS Stock No. 499-3322
BrandRS PRO
$10.54
Each
units
1/2 in G Female 1/2 in R Male - - Elbow Circular 90° 1/2in 1/2in - Female Male - R (taper)
RS Stock No. 499-3669
BrandRS PRO
$20.62
Each
units
1-1/2 in R Male - 1.21in - Plug Hexagon - 1-1/2in - - Male - - R (taper)
RS Stock No. 499-3681
BrandRS PRO
$47.00
Each
units
1-1/4 in G Female 1-1/4 in G Female 2.28in - Union Decagon Straight 1-1/4in 1-1/4in - Female Female - G (parallel)
RS Stock No. 499-3136
BrandRS PRO
$22.51
Each
units
1-1/4 in G Female 1-1/4 in G Female - - Socket - - 1-1/4in 1-1/4in - Female Female - G (parallel)
RS Stock No. 295-2795
Mfr. Part No.1823 16 21
BrandLegris
$57.37
Each
units
1/2 in R Male 16 mm Barbed Male - - Tailpiece Adapter Hexagon Straight 1/2in - - Male Male - R (taper)
RS Stock No. 499-3467
BrandRS PRO
$5.67
Each
units
1/2 in R Male - 0.89in - Plug Hexagon - 1/2in - - Male - - R (taper)
RS Stock No. 499-3120
BrandRS PRO
$28.68
Each
units
1-1/2 in G Female 1-1/2 in G Female 3.48in 1-1/2 in G Female Tee Circular Tee 1-1/2in 1-1/2in 1-1/2 Female Female Female G (parallel)
RS Stock No. 295-2751
Mfr. Part No.0285 21 00
BrandLegris
$23.91
Each (In a Pack of 2)
units
1/2 in R Male - - - Plug Hexagon - 1/2in - - Male - - R (taper)