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AS18280B — PLUG,TUBE FITTING,THREADED

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

AS18280B: PLUG,TUBE FITTING,THREADED.

The PLUG,TUBE FITTING,THREADED is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 7075 OVERALL, flow_angle: 45.0 DEGREES, leg_length: 1.836 INCHES NOMINAL FIRST END IN, seat_angle: 12.0 DEGREES ALL ENDS, thread_class: 3A SECOND END A, connection_type: THREADED EXTERNAL TUBE ALL ENDS. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-540-2231, 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
AS18280B
NSN: 4730-00-540-2231
NIINs: 005402231, 006029268, 014366371
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 81343 — SOCIETY OF AUTOMOTIVE ENGINEERS INC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 7075 OVERALL
flow_angle45.0 DEGREES
leg_length1.836 INCHES NOMINAL FIRST END IN
seat_angle12.0 DEGREES ALL ENDS
thread_class3A SECOND END A
connection_typeTHREADED EXTERNAL TUBE ALL ENDS
connection_styleFLARELESS (TUBE) ALL ENDS
surface_treatmentANODIZE OVERALL
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.750 INCHES FIRST END IN
media_for_which_designedAERONAUTICAL FLUID SINGLE RESPONSE
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) FIRST END BULKHEAD
NSN4730-00-540-2231
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AS18280B · 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
•
HEAD HEIGHT: 0.156 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625,TY 2,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
CONNECTION STYLE: FLARELESS
•
STYLE DESIGNATOR: PLUG, TUBE FITTING FLARELESS (NOTE: DRILLED HOLE IS OPTIONAL, SHOULD NOT BE CONSIDERED AS A SEPARATING CHARACTERISTIC)
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND EXTERNAL
•
NOMINAL THREAD SIZE: 0.312 INCHES EXTERNAL IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.156 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TY 2,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
CONNECTION STYLEFLARELESS
STYLE DESIGNATORPLUG, TUBE FITTING FLARELESS (NOTE: DRILLED HOLE IS OPTIONAL, SHOULD NOT BE CONSIDERED AS A SEPARATING CHARACTERISTIC)
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH0.531 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND EXTERNAL
NOMINAL THREAD SIZE0.312 INCHES EXTERNAL IN
SEAT ANGLE6.0 DEGREES
SPECIFICATION/STANDARD DATA81343-AS21913 GOVERNMENT STANDARD
SUBSTITUTES & CROSS-REFERENCES 7
AS21913Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS21913W2Reference document
Same NSN cross-reference
Reference document — Secondary reference
AS18280Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS21913D2Reference document
Same NSN cross-reference
Reference document — Secondary reference
SAE-AS18280Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
AS21913D2Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AS18280B?
AS18280B is a PLUG,TUBE FITTING,THREADED.
What parts can replace AS18280B?
There are 7 known substitutes for AS18280B: AS21913, MS21913W2, AS18280 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AS18280B?
AS18280B is cataloged in the U.S. Government catalog under NSN 4730-00-540-2231. This indicates validated use in U.S. government and defense supply chains.
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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.