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National Pipe Thread (NPT) Couplings

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The couplings shown here permit the joining of any combination of standard size tubing or tubing and standard pipe with female-to-female couplings. Other couplings available on special order.

Pressure Rating - The pressure rating of Autoclave couplings is based on the lower rated connection used.

Note: Special material couplings may be supplied with four flats in place of standard hex.

All Dimensions for reference only and subject to change.
For prompt service, Autoclave stocks select products. Consult your local representative.
All general terms and conditions of sale, including limitations of our liability, apply to all products and services sold.

Note: NPT (Pipe) connections
  • NPT threads must be sealed using a high quality PTFE tape and/or PTFE paste product. Refer to thread sealant manufacturer’s instructions on how to apply thread sealant.
  • Sealing performance may vary based on many factors such as pressure, temperature, media, thread quality, thread material, proper thread engagement and proper use of thread sealant.
  • Customer should limit the number of times an NPT fitting is assembled and disassembled because thread deformation during assembly will result in deteriorating seal quality over time. When using only PTFE tape, consider using thread lubrication to prevent galling of mating parts.



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  Results 1 - 25 of 61 1 2 3 

Item #

Connection “A”

Connection “B”

A - Hex

B - Length

15F2281 1/8 NPT W125 0.63 Inch
15.9
mm
1.38 Inch
35.1
mm
15F2482 1/8 NPT SW250 0.63 Inch
15.9
mm
1.50 Inch
38.10
mm
15F2682 1/8 NPT SW375 0.75 Inch
19.1
mm
1.63 Inch
41.4
mm
10F2882 1/8 NPT SW500 1 Inch
25.4
mm
1.50 Inch
38.10
mm
15F2486 1/8 NPT SF250CX 0.63 Inch
15.9
mm
1.38 Inch
35.1
mm
15F2686 1/8 NPT SF375CX 0.75 Inch
19.1
mm
1.50 Inch
38.10
mm
15F2986 1/8 NPT SF562CX 1 Inch
25.4
mm
1.63 Inch
41.4
mm
15F21286 1/8 NPT SF750CX 1.38 Inch
35.1
mm
1.75 Inch
44.5
mm
15F2483 1/8 NPT F250C 0.75 Inch
19.1
mm
1.38 Inch
35.1
mm
15F2683 1/8 NPT F375C 1 Inch
25.4
mm
1.63 Inch
41.4
mm
15F2983 1/8 NPT F562C 1.38 Inch
35.1
mm
1.82 Inch
46.2
mm
15F2583 1/8 NPT F312C150 1 Inch
25.4
mm
2.13 Inch
54.1
mm
15F4281 1/4 NPT W125 0.75 Inch
19.1
mm
1.50 Inch
38.10
mm
15F4482 1/4 NPT SW250 0.75 Inch
19.1
mm
1.63 Inch
41.4
mm
15F4682 1/4 NPT SW375 0.75 Inch
19.1
mm
1.75 Inch
44.5
mm
10F4882 1/4 NPT SW500 1 Inch
25.4
mm
2 Inch
50.8
mm
15F4486 1/4 NPT SF250CX 0.75 Inch
19.1
mm
1.63 Inch
41.4
mm
15F4686 1/4 NPT SF375CX 0.75 Inch
19.1
mm
1.75 Inch
44.5
mm
15F4986 1/4 NPT SF562CX 1 Inch
25.4
mm
2 Inch
50.8
mm
15F41286 1/4 NPT SF750CX 1.38 Inch
35.1
mm
1.75 Inch
44.5
mm
15F41686 1/4 NPT SF1000CX 1.38 Inch
35.1
mm
2.38 Inch
60.33
mm
15F4483 1/4 NPT F250C 0.75 Inch
19.1
mm
1.63 Inch
41.4
mm
15F4683 1/4 NPT F375C 1 Inch
25.4
mm
1.88 Inch
47.8
mm
15F4983 1/4 NPT F562C 1.38 Inch
35.1
mm
2 Inch
50.8
mm
15F4583 1/4 NPT F312C150 1 Inch
25.4
mm
2.50 Inch
63.50
mm
  Results 1 - 25 of 61 1 2 3 

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