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PartsTable / COMPONENT / AN825-4D
AN825-4D ✓ 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 ADAPTER,STRAIGHT,PIPE TO BOSS is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2014 OR ALUMINUM ALLOY 2024 OVERALL, leg_length: 0.859 INCHES NOMINAL FIRST END IN, seat_angle: 37.0 DEGREES FIRST END, thread_class: 3A SECOND END A, connection_type: THREADED EXTERNAL TUBE SECOND END, connection_style: FLARED (TUBE) SECOND END. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-279-0456, 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
AN825-4D
NSN: 4730-00-279-0456
FSC: 4730
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2014 OR ALUMINUM ALLOY 2024 OVERALL
leg_length0.859 INCHES NOMINAL FIRST END IN
seat_angle37.0 DEGREES FIRST END
thread_class3A SECOND END A
connection_typeTHREADED EXTERNAL TUBE SECOND END
connection_styleFLARED (TUBE) SECOND END
special_featuresGRUMMAN A-10 AIRCRAFT;WEAPON SYSTEM ESSENTIAL
surface_treatmentANODIZE INSIDE
nominal_thread_size0.125 INCHES THIRD END IN
end_item_identificationAIRCRAFT, EAGLE F-15
thread_series_designatorUNF SECOND END
criticality_code_justificationFEAT
NSN4730-00-279-0456
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AN825-4D · 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
•
CONNECTION TYPE: THREADED EXTERNAL PIPE THIRD END
•
NOMINAL THREAD SIZE: 0.125 INCHES THIRD END IN
•
LEG LENGTH: 0.859 INCHES NOMINAL FIRST END IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/4,TEMPER T6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-367,TEMPER T6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-225/6,TEMPER T6 OR T851 FED SPEC 2ND MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT: ANODIZE INSIDE
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION TYPETHREADED EXTERNAL PIPE THIRD END
NOMINAL THREAD SIZE0.125 INCHES THIRD END IN
LEG LENGTH0.859 INCHES NOMINAL FIRST END IN
NOMINAL THREAD SIZE0.438 INCHES SECOND END IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/4,TEMPER T6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-367,TEMPER T6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-225/6,TEMPER T6 OR T851 FED SPEC 2ND MATERIAL RESPONSE OVERALL
SURFACE TREATMENTANODIZE INSIDE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST END
SURFACE TREATMENTANODIZE OUTSIDE
SEAT ANGLE37.0 DEGREES SECOND END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
24836Interchangeable
interchangeable cross-reference
interchangeable
102-3933-23Interchangeable
interchangeable cross-reference
interchangeable
4010-920743Interchangeable
interchangeable cross-reference
interchangeable
8100Interchangeable
interchangeable cross-reference
interchangeable
98-2504Interchangeable
interchangeable cross-reference
interchangeable
8100-0-50Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN825-4D?
AN825-4D is a ADAPTER,STRAIGHT,PIPE TO BOSS.
What parts can replace AN825-4D?
There are 12 known substitutes for AN825-4D: 24836, 102-3933-23, 4010-920743 and 9 more. Substitute compatibility should be verified for your specific system.
Is AN825-4D still available?
AN825-4D 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