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PWA55639 — ADAPTER,STRAIGHT,PIPE TO TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

PWA55639: ADAPTER,STRAIGHT,PIPE TO TUBE.

The ADAPTER,STRAIGHT,PIPE TO TUBE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 316 OVERALL, connection_type: UNTHREADED EXTERNAL TUBE FIRST END, connection_style: PLAIN (PIPE) SECOND END, special_features: STEEL; COMPANY ITEM NAME-FIXTURE, GAS BACKUP, 12TH STAGE VANES, surface_treatment: PASSIVATE OVERALL, nominal_thread_size: 0.250 INCHES SECOND END IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-957-1824, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
PWA55639
NSN: 4730-00-957-1824
NIINs: 009571824, 011300724
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL COMP 316 OVERALL
connection_typeUNTHREADED EXTERNAL TUBE FIRST END
connection_stylePLAIN (PIPE) SECOND END
special_featuresSTEEL; COMPANY ITEM NAME-FIXTURE, GAS BACKUP, 12TH STAGE VANES
surface_treatmentPASSIVATE OVERALL
nominal_thread_size0.250 INCHES SECOND END IN
functional_descriptionUSED AS GAS BACK UP FIXTURE DURING 12TH STAGE VANE PURGING OPERATIONS FOR TACKWELD
nominal_overall_height3.000 INCHES IN
nominal_overall_length1.437 INCHES IN
end_item_identificationF100-PW-100/200/220 ENGINE
nominal_overall_diameter19.000 INCHES IN
thread_series_designatorNPT SECOND END
NSN4730-00-957-1824
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: PWA55639 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
NOMINAL PIPE SIZE ACCOMMODATED: 0.250 INCHES SECOND END IN
•
CONNECTION STYLE: PLAIN (TUBE) FIRST END
•
NOMINAL OVERALL LENGTH: 1.437 INCHES IN
•
CONNECTION TYPE: THREADED EXTERNAL PIPE SECOND END
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES FIRST END IN
TECHNICAL CHARACTERISTICS
NOMINAL PIPE SIZE ACCOMMODATED0.250 INCHES SECOND END IN
CONNECTION STYLEPLAIN (TUBE) FIRST END
CONNECTION STYLEPLAIN (PIPE) SECOND END
NOMINAL OVERALL LENGTH1.437 INCHES IN
CONNECTION TYPETHREADED EXTERNAL PIPE SECOND END
CONNECTION TYPEUNTHREADED EXTERNAL TUBE FIRST END
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES FIRST END IN
NOMINAL THREAD SIZE0.250 INCHES SECOND END IN
SURFACE TREATMENTPASSIVATE OVERALL
SUBSTITUTES & CROSS-REFERENCES 8
4-4T2HF-SSReference document
Same NSN cross-reference
Reference document — Secondary reference
SS-4-TA-1-4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
SS401-A-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
2062133PK-002Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
PWA55639-8Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
CV0240-004Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is PWA55639?
PWA55639 is a ADAPTER,STRAIGHT,PIPE TO TUBE.
What parts can replace PWA55639?
There are 8 known substitutes for PWA55639: 4-4T2HF-SS, SS-4-TA-1-4, SS401-A-4 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for PWA55639?
PWA55639 is cataloged in the U.S. Government catalog under NSN 4730-00-957-1824. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.