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National Pipe Thread (NPT) Adapters

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Male /female adapters are designed to adapt a female connection to another size and/or type of connection without the need for additional couplings. In selecting an adapter involving two different sized connections, the larger connection should be on the male end where it is possible to maximize the mechanical strength of the adapter.

Other Adapters
Autoclave supplies many other types of adapters on special order. These include Autoclave Speed-bite swaged-type connections, socketweld to O.D. tube or nominal pipe size, male or female AN connections and others.

Materials
All Autoclave adapters are precision machined from coldworked Type 316 stainless steel. Other materials available on special order.

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 factory.
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 74 1 2 3 

Item #

Male End Fits this Connection

Female End

A - Hex

B - Length

15M22N1 1/8 NPT W125 0.5 Inch
12.7
mm
1.00 Inch
25.40
mm
15M24N2 1/8 NPT SW250 0.63 Inch
15.9
mm
1.25 Inch
31.8
mm
15M26N2 1/8 NPT SW375 0.75 Inch
19.1
mm
1.44 Inch
36.5
mm
10M28N2 1/8 NPT SW500 1 Inch
25.4
mm
1.50 Inch
38.10
mm
15M24N6 1/8 NPT SF250CX 0.63 Inch
15.9
mm
1.81 Inch
46
mm
15M26N6 1/8 NPT SF375CX 0.75 Inch
19.1
mm
1.38 Inch
35.1
mm
15M29N6 1/8 NPT SF562CX 1 Inch
25.4
mm
1.75 Inch
44.5
mm
15M24N3 1/8 NPT F250C 0.75 Inch
19.1
mm
1.25 Inch
31.8
mm
15M26N3 1/8 NPT F375C 1 Inch
25.4
mm
1.50 Inch
38.10
mm
15M29N3 1/8 NPT F562C 1.38 Inch
35.1
mm
1.63 Inch
41.3
mm
15M42N1 1/4 NPT W125 0.63 Inch
15.9
mm
1.13 Inch
28.6
mm
15M44N2 1/4 NPT SW250 0.63 Inch
15.9
mm
1.38 Inch
35.1
mm
15M46N2 1/4 NPT SW375 0.75 Inch
19.1
mm
1.50 Inch
38.10
mm
10M48N2 1/4 NPT SW500 1 Inch
25.4
mm
1.75 Inch
44.5
mm
15M44N6 1/4 NPT SF250CX 0.63 Inch
15.9
mm
1.38 Inch
35.1
mm
15M46N6 1/4 NPT SF375CX 0.75 Inch
19.1
mm
1.56 Inch
39.7
mm
15M49N6 1/4 NPT SF562CX 1 Inch
25.4
mm
1.75 Inch
44.5
mm
15M412N6 1/4 NPT SF750CX 1.38 Inch
35.1
mm
2.25 Inch
57.2
mm
15M416N6 1/4 NPT SF1000CX 1.75 Inch
44.50
mm
2.88 Inch
73.0
mm
15M424N6 1/4 NPT SF1500CX 2.25 Inch
57.15
mm
3.48 Inch
88.39
mm
15M44N3 1/4 NPT F250C 0.75 Inch
19.1
mm
1.38 Inch
35.1
mm
15M45N3 1/4 NPT F312C150 1 Inch
25.4
mm
2.50 Inch
63.50
mm
15M46N3 1/4 NPT F375C 1 Inch
25.4
mm
1.63 Inch
41.3
mm
15M49N3 1/4 NPT F562C 1.38 Inch
35.1
mm
1.75 Inch
44.5
mm
15M48N8 1/4 NPT 1/2 NPT 1.18 Inch
30.1
mm
2.25 Inch
57.2
mm
  Results 1 - 25 of 74 1 2 3 

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