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. 222-6636
BrandRS PRO
$40.39
Each
units
1/2 in NPT Male 1/2 in NPT Male - - Nipple Hexagon - 1/2in 1/2in - Male Male - NPT (taper)
RS Stock No. 499-3338
BrandRS PRO
$13.75
Each
units
3/4 in G Female 3/4 in R Male - - Elbow Circular 90° 3/4in 3/4in - Female Male - R (taper)
RS Stock No. 826-7002
BrandRS PRO
$26.03
Each
units
3/4 in Rc Female 3/4 in Rc Female 2.01in - Coupler Circular Straight 3/4in 3/4in - Female Female - Rc (taper)
RS Stock No. 499-2947
BrandRS PRO
$4.65
Each
units
3/8 in R Male 3/8 in R Male 1.26in - Hexagon Nipple Hexagon - 3/8in 3/8in - Male Male - R (taper)
RS Stock No. 499-3518
BrandRS PRO
$31.54
Each
units
1 in G Female 1 in G Female 2.01in - Union Octagon Straight 1in 1in - Female Female - G (parallel)
RS Stock No. 826-7040
BrandRS PRO
$12.39
Each
units
1/4 in R Male 1/4 in R Male 1.42in - Nipple Hexagon Straight 1/4in 1/4in - Male Male - R (taper)
RS Stock No. 499-3366
BrandRS PRO
$35.16
Each
units
1-1/2 in G Female 1-1/2 in R Male - - Elbow Circular 90° 1-1/2in 1-1/2in - Female Male - R (taper)
RS Stock No. 499-3300
BrandRS PRO
$5.65
Each
units
1/4 in G Female 1/4 in R Male - - Elbow Circular 90° 1/4in 1/4in - Female Male - R (taper)
RS Stock No. 826-6986
BrandRS PRO
$107.50
Each
units
1-1/4 in G Female 1-1/4 in G Female 4.02in 1-1/4 in G Female Tee Circular Tee 1-1/4in 1-1/4in 1-1/4 Female Female Female G (parallel)
RS Stock No. 826-7034
BrandRS PRO
$32.14
Each
units
1-1/4 in R Male - 1.38in - Hexagon Plug Hexagon Straight 1-1/4in - - Male - - R (taper)
RS Stock No. 826-6955
BrandRS PRO
$65.29
Each
units
3/4 in R Male 3/4 in Rc Female - - Elbow Circular 90° 3/4in 3/4in - Male Female - R (taper)
RS Stock No. 826-7052
BrandRS PRO
$20.37
Each
units
1/2 in R Male 1/2 in R Male 1.89in - Nipple Hexagon Straight 1/2in 1/2in - Male Male - R (taper)
RS Stock No. 826-7144
BrandRS PRO
$206.08
Each
units
1 in R Male 1 in Rc Female 3.39in - Union Octagon Straight 1in 1in - Male Female - R (taper)
RS Stock No. 222-6658
BrandRS PRO
$83.19
Each
units
1 in NPT Male 1 in NPT Male - - Nipple Hexagon - 1in 1in - Male Male - NPT (taper)
RS Stock No. 499-3805
BrandRS PRO
$47.58
Each
units
2 in R Male 51.5 mm Barbed Male 3.46in - Hose Nipple Hexagon - 2in - - Male Male - R (taper)
RS Stock No. 826-7071
BrandRS PRO
$179.83
Each
units
2 in R Male 2 in R Male 2.8in - Nipple Hexagon Straight 2in 2in - Male Male - R (taper)
RS Stock No. 499-3265
BrandRS PRO
$10.805
Each (In a Pack of 2)
units
1 in R Male 1 in R Male 2.36in - Barrel Nipple Circular - 1in 1in - Male Male - R (taper)
RS Stock No. 499-2919
BrandRS PRO
$4.48
Each
units
3/8 in G Female 3/8 in G Female - - Socket - - 3/8in 3/8in - Female Female - G (parallel)
RS Stock No. 499-3350
BrandRS PRO
$28.70
Each
units
1-1/4 in G Female 1-1/4 in R Male - - Elbow Circular 90° 1-1/4in 1-1/4in - Female Male - G (parallel)
RS Stock No. 222-6614
BrandRS PRO
$35.27
Each
units
3/4 in NPT Male - - - Plug Hexagon - 3/4in - - Male - - NPT (taper)
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