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981 PCA .125IN — PRESSURE CHANGE ASSEMBLY

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

981 PCA .125IN: PRESSURE CHANGE ASSEMBLY.

The PRESSURE CHANGE ASSEMBLY is a the manufacturer industrial component. Key specifications include special_features: INCLUDES VALVE SEAT, VALVE, VALVE RETAINER, LEVER, GUIDE PIN ASSEMBLY AND 2 SCREWS, end_item_identification: STRATEGIC SEALIFT CONVERSION SHIPS CLASS. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-437-5998, 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
981 PCA .125IN
NSN: 4730-01-437-5998
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 03933 — ARMSTRONG INTERNATIONAL INC DBA ARMSTRONG MACHINE WORKS (USA)
SPECIFICATIONS
special_featuresINCLUDES VALVE SEAT, VALVE, VALVE RETAINER, LEVER, GUIDE PIN ASSEMBLY AND 2 SCREWS
end_item_identificationSTRATEGIC SEALIFT CONVERSION SHIPS CLASS
NSN4730-01-437-5998
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 981 PCA .125IN · 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
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESINCLUDES VALVE SEAT, VALVE, VALVE RETAINER, LEVER, GUIDE PIN ASSEMBLY AND 2 SCREWS
END ITEM IDENTIFICATIONSTRATEGIC SEALIFT CONVERSION SHIPS CLASS
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 1
1007Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 981 PCA .125IN?
981 PCA .125IN is a PRESSURE CHANGE ASSEMBLY.
What parts can replace 981 PCA .125IN?
There is 1 known substitute for 981 PCA .125IN: 1007. Substitute compatibility should be verified for your specific system.
What is the NSN for 981 PCA .125IN?
981 PCA .125IN is cataloged in the U.S. Government catalog under NSN 4730-01-437-5998. 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.