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Cast Stainless Threaded

  • Cast Stainless Threaded Unions are stocked in sizes from 1/4" to 4".
  • Available in grades 304 and 316.
  • All Cast Stainless Threaded Unions sold here are imported and Class 150#.
Five different sizes of Cast Stainless Threaded Unions. Sizes are Nominal Pipe Size (NPS) - size chart
Cast Stainless Threaded Unions
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To start, select size. Follow the green box to refine selections as desired. Click “Lookup Product” any time after selecting size to display products matching criteria entered so far. Fields autofill when only one choice. Or use search box above.

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Class for pipe fittings is a standard defined by the ASME/ASTM. Though stated with a # sign, such as 150# or 3000#, it is not a direct pressure rating.  The pressure rating is dependent on material and temperature and is found by consulting an appropriate reference guide.
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Material refers to the grade of stainless, either 304, 304L, 316 or 316L. The L designates "low carbon", making the fitting good for welding.
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Domestic = Made in the USA Import = Made anywhere else
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Unions » Cast Stainless Threaded
  • Product Name: SS.250 150# THD UNION
  • SKU: 102496
  • Weight: .19
  • Class: 150#
  • Material: Stainless 304
  • Origin: Import
  • Size: 0.25

Description:
304 STAINLESS STEEL (CAST)

FOR 1/4" PIPE(.540 OD) FEMALE THREADS

Price by Quantity:
1 - 9 = $13.13
10 - 24 = $11.81
25 - 49 = $10.50
50 + = $9.19
Quantity:
–
+
We show 16 in stock
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To estimate shipping please add to cart, click checkout and enter your zipcode on the left.
All items ship from Houston, TX.

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Unions » Cast Stainless Threaded
  • Product Name: SS.250 150# THD UNION*
  • SKU: 110537
  • Weight: .19
  • Class: 150#
  • Material: Stainless 316
  • Origin: Import
  • Size: 0.25

Description:
316 STAINLESS STEEL (CAST)

FOR 1/4" PIPE(.540 OD) FEMALE THREADS

Price by Quantity:
1 - 9 = $15.00
10 - 24 = $13.50
25 - 49 = $12.00
50 + = $10.50
Quantity:
–
+
We show 27 in stock
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To estimate shipping please add to cart, click checkout and enter your zipcode on the left.
All items ship from Houston, TX.

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Unions » Cast Stainless Threaded
  • Product Name: SS.375 150# THD UNION
  • SKU: 105233
  • Weight: .31
  • Class: 150#
  • Material: Stainless 304
  • Origin: Import
  • Size: 0.375

Description:
304 STAINLESS STEEL (CAST)

FOR 3/8" PIPE(.675 OD) FEMALE THREADS

Price by Quantity:
1 - 9 = $17.25
10 - 24 = $15.81
25 - 49 = $14.38
50 + = $11.50
Quantity:
–
+
We show 0 in stock
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Get a quick quote

To estimate shipping please add to cart, click checkout and enter your zipcode on the left.
All items ship from Houston, TX.

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Unions » Cast Stainless Threaded
  • Product Name: SS.500 150# THD UNION
  • SKU: 105232
  • Weight: .38
  • Class: 150#
  • Material: Stainless 304
  • Origin: Import
  • Size: 0.50

Description:
304 STAINLESS STEEL (CAST)

FOR 1/2" PIPE(.840 OD) FEMALE THREADS

Price by Quantity:
1 - 9 = $10.78
10 - 24 = $9.43
25 - 49 = $8.35
50 + = $7.55
Quantity:
–
+
We show 44 in stock
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To estimate shipping please add to cart, click checkout and enter your zipcode on the left.
All items ship from Houston, TX.

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Unions » Cast Stainless Threaded
  • Product Name: SS.500 150# THD UNION*
  • SKU: 111804
  • Weight: .38
  • Class: 150#
  • Material: Stainless 316
  • Origin: Import
  • Size: 0.50

Description:
316 STAINLESS STEEL (CAST)

FOR 1/2" PIPE(.840 OD) FEMALE THREADS

Price by Quantity:
1 - 9 = $12.60
10 - 24 = $11.03
25 - 49 = $9.77
50 + = $8.82
Quantity:
–
+
We show 5 in stock
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To estimate shipping please add to cart, click checkout and enter your zipcode on the left.
All items ship from Houston, TX.

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Unions » Cast Stainless Threaded
  • Product Name: SS.750 150# THD UNION
  • SKU: 101624
  • Weight: .65
  • Class: 150#
  • Material: Stainless 304
  • Origin: Import
  • Size: 0.75

Description:
304 STAINLESS STEEL (CAST)

FOR 3/4" PIPE(1.05 OD) FEMALE THREADS

Price by Quantity:
1 - 9 = $12.50
10 - 24 = $10.94
25 - 49 = $9.69
50 + = $8.75
Quantity:
–
+
We show 43 in stock
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To estimate shipping please add to cart, click checkout and enter your zipcode on the left.
All items ship from Houston, TX.

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Unions » Cast Stainless Threaded
  • Product Name: SS.750 150# THD UNION*
  • SKU: 112989
  • Weight: .65
  • Class: 150#
  • Material: Stainless 316
  • Origin: Import
  • Size: 0.75

Description:
316 STAINLESS STEEL (CAST)

FOR 3/4" PIPE(1.05 OD) FEMALE THREADS

Price by Quantity:
1 - 9 = $17.12
10 - 49 = $14.98
50 - 99 = $13.27
100 + = $11.98
Quantity:
–
+
We show 2 in stock
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To estimate shipping please add to cart, click checkout and enter your zipcode on the left.
All items ship from Houston, TX.

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Unions » Cast Stainless Threaded
  • Product Name: SS1.00 150# THD UNION
  • SKU: 104628
  • Weight: .90
  • Class: 150#
  • Material: Stainless 304
  • Origin: Import
  • Size: 1.00

Description:
304 STAINLESS STEEL (CAST)

FOR 1" PIPE(1.315 OD) FEMALE THREADS

Price by Quantity:
1 - 9 = $19.00
10 - 24 = $16.63
25 - 49 = $14.73
50 + = $13.30
Quantity:
–
+
We show 18 in stock
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To estimate shipping please add to cart, click checkout and enter your zipcode on the left.
All items ship from Houston, TX.

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Unions » Cast Stainless Threaded
  • Product Name: SS1.00 150# THD UNION*
  • SKU: 119866
  • Weight: .90
  • Class: 150#
  • Material: Stainless 316
  • Origin: Import
  • Size: 1.00

Description:
316 STAINLESS STEEL (CAST)

FOR 1" PIPE(1.315 OD) FEMALE THREADS

Price by Quantity:
1 - 9 = $23.42
10 - 24 = $20.49
25 - 49 = $18.15
50 + = $16.39
Quantity:
–
+
We show 13 in stock
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To estimate shipping please add to cart, click checkout and enter your zipcode on the left.
All items ship from Houston, TX.

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Unions » Cast Stainless Threaded
  • Product Name: SS1.25 150# THD UNION
  • SKU: 102088
  • Weight: 1.45
  • Class: 150#
  • Material: Stainless 304
  • Origin: Import
  • Size: 1.25

Description:
304 STAINLESS STEEL (CAST)

FOR 1-1/4" PIPE(1.66 OD) FEMALE THREADS

Price by Quantity:
1 - 9 = $23.94
10 - 24 = $23.22
25 - 49 = $22.49
50 + = $21.04
Quantity:
–
+
We show 136 in stock
cart-icon

To estimate shipping please add to cart, click checkout and enter your zipcode on the left.
All items ship from Houston, TX.

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Unions » Cast Stainless Threaded
  • Product Name: SS1.25 150# THD UNION*
  • SKU: 123166
  • Weight: 1.45
  • Class: 150#
  • Material: Stainless 316
  • Origin: Import
  • Size: 1.25

Description:
316 STAINLESS STEEL (CAST)

FOR 1-1/4" PIPE(1.66 OD) FEMALE THREADS

Price by Quantity:
1 - 9 = $44.72
10 - 24 = $39.13
25 - 49 = $34.66
50 + = $31.30
Quantity:
–
+
We show 4 in stock
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To estimate shipping please add to cart, click checkout and enter your zipcode on the left.
All items ship from Houston, TX.

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Unions » Cast Stainless Threaded
  • Product Name: SS1.50 150# THD UNION
  • SKU: 103427
  • Weight: 1.56
  • Class: 150#
  • Material: Stainless 304
  • Origin: Import
  • Size: 1.50

Description:
304 STAINLESS STEEL (CAST)

FOR 1-1/2" PIPE(1.90 OD) FEMALE THREADS

Price by Quantity:
1 - 9 = $41.63
10 - 24 = $37.00
25 - 49 = $32.38
50 + = $28.68
Quantity:
–
+
We show 22 in stock
cart-icon

To estimate shipping please add to cart, click checkout and enter your zipcode on the left.
All items ship from Houston, TX.

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Unions » Cast Stainless Threaded
  • Product Name: SS1.50 150# THD UNION*
  • SKU: 108168
  • Weight: 1.56
  • Class: 150#
  • Material: Stainless 316
  • Origin: Import
  • Size: 1.50

Description:
316 STAINLESS STEEL (CAST)

FOR 1-1/2" PIPE(1.90 OD) FEMALE THREADS

Price by Quantity:
1 - 9 = $51.75
10 - 24 = $46.00
25 - 49 = $40.25
50 + = $35.65
Quantity:
–
+
We show 22 in stock
cart-icon

To estimate shipping please add to cart, click checkout and enter your zipcode on the left.
All items ship from Houston, TX.

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Unions » Cast Stainless Threaded
  • Product Name: SS2.00 150# THD UNION
  • SKU: 102094
  • Weight: 2.43
  • Class: 150#
  • Material: Stainless 304
  • Origin: Import
  • Size: 2.00

Description:
304 STAINLESS STEEL (CAST)

FOR 2" PIPE(2.375 OD) FEMALE THREADS

Price by Quantity:
1 - 9 = $44.00
10 - 24 = $38.50
25 - 49 = $34.10
50 + = $30.80
Quantity:
–
+
We show 46 in stock
cart-icon

To estimate shipping please add to cart, click checkout and enter your zipcode on the left.
All items ship from Houston, TX.

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Unions » Cast Stainless Threaded
  • Product Name: SS2.00 150# THD UNION*
  • SKU: 113504
  • Weight: 2.43
  • Class: 150#
  • Material: Stainless 316
  • Origin: Import
  • Size: 2.00

Description:
316 STAINLESS STEEL (CAST)

FOR 2" PIPE(2.375 OD) FEMALE THREADS

Price by Quantity:
1 - 9 = $62.90
10 - 24 = $55.04
25 - 49 = $51.89
50 + = $48.75
Quantity:
–
+
We show 9 in stock
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To estimate shipping please add to cart, click checkout and enter your zipcode on the left.
All items ship from Houston, TX.

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Unions » Cast Stainless Threaded
  • Product Name: SS2.50 150# THD UNION
  • SKU: 120328
  • Weight: 3.91
  • Class: 150#
  • Material: Stainless 304
  • Origin: Import
  • Size: 2.50

Description:
304 STAINLESS STEEL (CAST)

FOR 2-1/2" PIPE(2.875 OD) FEMALE THREADS

Price by Quantity:
1 - 9 = $150.00
10 - 24 = $131.25
25 - 49 = $116.25
50 + = $105.00
Quantity:
–
+
We show 0 in stock
cart-icon
Get a quick quote

To estimate shipping please add to cart, click checkout and enter your zipcode on the left.
All items ship from Houston, TX.

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Unions » Cast Stainless Threaded
  • Product Name: SS2.50 150# THD UNION*
  • SKU: 120173
  • Weight: 3.91
  • Class: 150#
  • Material: Stainless 316
  • Origin: Import
  • Size: 2.50

Description:
316 STAINLESS STEEL (CAST)

FOR 2-1/2" PIPE(2.875 OD) FEMALE THREADS

Price by Quantity:
1 - 9 = $158.00
10 - 49 = $138.25
50 - 99 = $122.45
100 + = $110.60
Quantity:
–
+
We show 2 in stock
cart-icon

To estimate shipping please add to cart, click checkout and enter your zipcode on the left.
All items ship from Houston, TX.

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Unions » Cast Stainless Threaded
  • Product Name: SS3.00 150# THD UNION
  • SKU: 119239
  • Weight: 5.08
  • Class: 150#
  • Material: Stainless 304
  • Origin: Import
  • Size: 3.00

Description:
304 STAINLESS STEEL (CAST)

FOR 3" PIPE(3.50 OD) FEMALE THREADS

Price by Quantity:
1 - 9 = $160.00
10 - 24 = $140.00
25 - 49 = $124.00
50 + = $112.00
Quantity:
–
+
We show 5 in stock
cart-icon

To estimate shipping please add to cart, click checkout and enter your zipcode on the left.
All items ship from Houston, TX.

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Unions » Cast Stainless Threaded
  • Product Name: SS3.00 150# THD UNION*
  • SKU: 117845
  • Weight: 5.08
  • Class: 150#
  • Material: Stainless 316
  • Origin: Import
  • Size: 3.00

Description:
316 STAINLESS STEEL (CAST)

FOR 3" PIPE(3.50 OD) FEMALE THREADS

Price by Quantity:
1 - 9 = $210.00
10 - 24 = $183.75
25 - 49 = $162.75
50 + = $147.00
Quantity:
–
+
We show 1 in stock
cart-icon

To estimate shipping please add to cart, click checkout and enter your zipcode on the left.
All items ship from Houston, TX.

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Unions » Cast Stainless Threaded
  • Product Name: SS4.00 150# THD UNION
  • SKU: 122922
  • Weight: 8.19
  • Class: 150#
  • Material: Stainless 304
  • Origin: Import
  • Size: 4.00

Description:
304 STAINLESS STEEL (CAST)

FOR 4" PIPE(4.50 OD) FEMALE THREADS

Price by Quantity:
1 - 9 = $191.36
10 - 24 = $167.44
25 - 49 = $148.30
50 + = $133.95
Quantity:
–
+
We show 3 in stock
cart-icon

To estimate shipping please add to cart, click checkout and enter your zipcode on the left.
All items ship from Houston, TX.

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Unions » Cast Stainless Threaded
  • Product Name: SS4.00 150# THD UNION*
  • SKU: 145045
  • Weight: 8.18
  • Class: 150#
  • Material: Stainless 316
  • Origin: Import
  • Size: 4.00

Description:
316 STAINLESS STEEL (CAST)

Price by Quantity:
1 - 9 = $182.00
10 - 24 = $159.25
25 - 49 = $141.05
50 + = $127.40
Quantity:
–
+
We show 2 in stock
cart-icon

To estimate shipping please add to cart, click checkout and enter your zipcode on the left.
All items ship from Houston, TX.