PartsTable
Technical Data Sheet
AN826-4B ✓ 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: COPPER ALLOY OVERALL, leg_length: 0.890 INCHES NOMINAL FIRST END IN, seat_angle: 37.0 DEGREES FIRST END, thread_class: 2A FIRST END A, connection_type: THREADED EXTERNAL TUBE THIRD END, connection_style: FLARED (TUBE) FIRST END. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-279-0778, 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
AN826-4B
NSN: 4730-00-279-0778
FSC: 4730
CAGE: 32382 — ARLINGTON AIR PARTS INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
leg_length0.890 INCHES NOMINAL FIRST END IN
seat_angle37.0 DEGREES FIRST END
thread_class2A FIRST END A
connection_typeTHREADED EXTERNAL TUBE THIRD END
connection_styleFLARED (TUBE) FIRST END
special_featuresWEAPON SYSTEM ESSENTIAL; COPPER ALLOY
nominal_thread_size0.438 INCHES THIRD END IN
end_item_identificationAIRCRAFT, SHIP - CV
thread_series_designatorNPTF SECOND END
nondefinitive_spec/std_data5C FIGURE
specification/standard_data81343-J514 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN4730-00-279-0778
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AN826-4B · 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 STYLE: FLARED (TUBE) THIRD END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES FIRST END IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416, TY 2, CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE
THREAD SERIES DESIGNATOR: UNF FIRST END
NOMINAL THREAD SIZE: 0.438 INCHES THIRD END IN
THREAD CLASS: 2A THIRD END A
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION STYLEFLARED (TUBE) THIRD END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES FIRST END IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416, TY 2, CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE
THREAD SERIES DESIGNATORUNF FIRST END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES THIRD END IN
NOMINAL THREAD SIZE0.438 INCHES THIRD END IN
CONNECTION STYLEPLAIN (PIPE) SECOND END
THREAD CLASS2A THIRD END A
THREAD CLASS2A FIRST END A
THREAD SERIES DESIGNATORNPTF SECOND END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
SAE-AS4842/1Interchangeable
interchangeable cross-reference
interchangeable
AS5198Interchangeable
interchangeable cross-reference
interchangeable
AS1958J080608Interchangeable
interchangeable cross-reference
interchangeable
AS4842/1Interchangeable
interchangeable cross-reference
interchangeable
AS5198-050205Interchangeable
interchangeable cross-reference
interchangeable
4213Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN826-4B?
AN826-4B is a ADAPTER,STRAIGHT,PIPE TO BOSS.
What parts can replace AN826-4B?
There are 19 known substitutes for AN826-4B: SAE-AS4842/1, AS5198, AS1958J080608 and 16 more. Substitute compatibility should be verified for your specific system.
Is AN826-4B still available?
AN826-4B is currently cancelled.
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