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PartsTable / COMPONENT / GS531E400A
GS531E400A ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The COUPLING BODY,TUBE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY, thread_size: 4-1/2-16, thread_class: 2A A, overall_length: 1.350 INCHES NOMINAL IN, outside_diameter: 4.625 INCHES NOMINAL IN, style_designator: FLEXIBLE COUPLING BODY. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-297-7326, 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
GS531E400A
NSN: 4730-01-297-7326
FSC: 4730
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY
thread_size4-1/2-16
thread_class2A A
overall_length1.350 INCHES NOMINAL IN
outside_diameter4.625 INCHES NOMINAL IN
style_designatorFLEXIBLE COUPLING BODY
thread_directionRIGHT-HAND
surface_treatmentANODIZE
screw_thread_series_designatorUN
tube_outside_diameter_for_which_designed4.000 INCHES NOMINAL IN
NSN4730-01-297-7326
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: GS531E400A · 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
•
THREAD DIRECTION: RIGHT-HAND
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 4.000 INCHES NOMINAL IN
•
SURFACE TREATMENT: ANODIZE
•
MATERIAL: ALUMINUM ALLOY
•
STYLE DESIGNATOR: FLEXIBLE COUPLING BODY
•
THREAD CLASS: 2A A
•
SCREW THREAD SERIES DESIGNATOR: UN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED4.000 INCHES NOMINAL IN
SURFACE TREATMENTANODIZE
MATERIALALUMINUM ALLOY
STYLE DESIGNATORFLEXIBLE COUPLING BODY
THREAD CLASS2A A
SCREW THREAD SERIES DESIGNATORUN
OVERALL LENGTH1.350 INCHES NOMINAL IN
OUTSIDE DIAMETER4.625 INCHES NOMINAL IN
THREAD SIZE4-1/2-16
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
T22Interchangeable
interchangeable cross-reference
interchangeable
3-70002Interchangeable
interchangeable cross-reference
interchangeable
ST3326Interchangeable
interchangeable cross-reference
interchangeable
TY21002Interchangeable
interchangeable cross-reference
interchangeable
7348113Interchangeable
interchangeable cross-reference
interchangeable
33222-01Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is GS531E400A?
GS531E400A is a COUPLING BODY,TUBE.
What parts can replace GS531E400A?
There are 13 known substitutes for GS531E400A: T22, 3-70002, ST3326 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for GS531E400A?
GS531E400A is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-297-7326. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026