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Technical Data Sheet
PartsTable / MRO / A454-4
A454-4 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
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 NUT,TUBE COUPLING,REDUCING is a the manufacturer industrial component. Key specifications include supplementary_features: COGNIZANT SERVICE - ROYAL AIR FORCE, end_item_identification: ARI 26153 RECEIVER SYSTEM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-260-8284, 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
MRO→ MRO_GENERAL→ A454-4
NSN: 4730-00-260-8284
FSC: 4730
CAGE: 41947 — MUELLER BRASS CO. (USA)
SPECIFICATIONS
supplementary_featuresCOGNIZANT SERVICE - ROYAL AIR FORCE
end_item_identificationARI 26153 RECEIVER SYSTEM
NSN4730-00-260-8284
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: A454-4 · 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
•
SPECIFICATION/STANDARD DATA: 81343-J513 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
SEAT ANGLE: 45.0 DEGREES
•
NOMINAL THREAD SIZE: 0.438 INCHES INTERNAL IN
•
THREAD SERIES DESIGNATOR: UNF INTERNAL
•
NONDEFINITIVE SPEC/STD DATA: 37 FIGURE
•
OPERATING PRESSURE: 500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
•
THREAD CLASS: 2B INTERNAL
•
STYLE DESIGNATOR: CAP
TECHNICAL CHARACTERISTICS (FLIS)
SPECIFICATION/STANDARD DATA81343-J513 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
SEAT ANGLE45.0 DEGREES
NOMINAL THREAD SIZE0.438 INCHES INTERNAL IN
THREAD SERIES DESIGNATORUNF INTERNAL
NONDEFINITIVE SPEC/STD DATA37 FIGURE
OPERATING PRESSURE500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
THREAD CLASS2B INTERNAL
STYLE DESIGNATORCAP
CONNECTION STYLEFLARE
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED0.250 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
AS568-226Interchangeable
interchangeable cross-reference
interchangeable
5592-PCInterchangeable
interchangeable cross-reference
interchangeable
2817-00Interchangeable
interchangeable cross-reference
interchangeable
DD19CA061Interchangeable
interchangeable cross-reference
interchangeable
NFT5-4Interchangeable
interchangeable cross-reference
interchangeable
A16447Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A454-4?
A454-4 is a NUT,TUBE COUPLING,REDUCING. It is classified as a MRO (MRO_GENERAL).
What parts can replace A454-4?
There are 20 known substitutes for A454-4: AS568-226, 5592-PC, 2817-00 and 17 more. Substitute compatibility should be verified for your specific system.
Is A454-4 still available?
A454-4 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026