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1551AS993-1 — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

1551AS993-1: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include leg_length: 0.375 INCHES NOMINAL IN, overall_length: 1.310 INCHES NOMINAL IN, special_features: FREE OF OIL, GREASE, FOREIGN MATERIAL, style_designator: MALE COUPLING HALF, end_item_identification: 3655-01-291-8634. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-497-9503, 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
1551AS993-1
NSN: 4730-01-497-9503
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 30003 — NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
leg_length0.375 INCHES NOMINAL IN
overall_length1.310 INCHES NOMINAL IN
special_featuresFREE OF OIL, GREASE, FOREIGN MATERIAL
style_designatorMALE COUPLING HALF
end_item_identification3655-01-291-8634
NSN4730-01-497-9503
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1551AS993-1 · 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
•
STYLE DESIGNATOR: MALE COUPLING HALF
•
LEG LENGTH: 0.375 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORMALE COUPLING HALF
OVERALL LENGTH1.310 INCHES NOMINAL IN
LEG LENGTH0.375 INCHES NOMINAL IN
SPECIAL FEATURESFREE OF OIL, GREASE, FOREIGN MATERIAL
END ITEM IDENTIFICATION3655-01-291-8634
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
1551AS993Reference document
Same NSN cross-reference
Reference document — Vendor item drawing 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 1551AS993-1?
1551AS993-1 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace 1551AS993-1?
There is 1 known substitute for 1551AS993-1: 1551AS993. Substitute compatibility should be verified for your specific system.
What is the NSN for 1551AS993-1?
1551AS993-1 is cataloged in the U.S. Government catalog under NSN 4730-01-497-9503. 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.