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A51S31543 — CAP,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

A51S31543: CAP,TUBE.

The CAP,TUBE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, connection_style: PLAIN (OPTIONAL END), style_designator: CAP, TUBE, FLARED, operating_pressure: 100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS, nominal_thread_size: 0.750 INCHES INTERNAL IN, end_item_identification: GRUMMAN AEROSAPCE CORP,AIRCRAFT MODEL F14A. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-290-9228, 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
A51S31543
NSN: 4730-01-290-9228
NIINs: 012909228, 012922504
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
connection_stylePLAIN (OPTIONAL END)
style_designatorCAP, TUBE, FLARED
operating_pressure100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
nominal_thread_size0.750 INCHES INTERNAL IN
end_item_identificationGRUMMAN AEROSAPCE CORP,AIRCRAFT MODEL F14A
media_for_which_designedHYDRAULIC FLUID
NSN4730-01-290-9228
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: A51S31543 · 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
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MATERIAL: ALUMINUM ALLOY OVERALL
TECHNICAL CHARACTERISTICS
END ITEM IDENTIFICATIONGRUMMAN AEROSAPCE CORP,AIRCRAFT MODEL F14A
MATERIALALUMINUM ALLOY OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
A51S31543-17Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
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 A51S31543?
A51S31543 is a CAP,TUBE.
What parts can replace A51S31543?
There is 1 known substitute for A51S31543: A51S31543-17. Substitute compatibility should be verified for your specific system.
What is the NSN for A51S31543?
A51S31543 is cataloged in the U.S. Government catalog under NSN 4730-01-290-9228. 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.