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Technical Data Sheet
PartsTable / COMPONENT / AN938D6
AN938D6 ✓ 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: STEEL COMP 1137 OR STEEL COMP 1141 OR STEEL COMP 4130 OR STEEL COMP 4140 OVERALL, leg_length: 0.922 INCHES MINIMUM AND 0.969 INCHES MAXIMUM FIRST END IN, seat_angle: 37.0 DEGREES THIRD END, thread_class: 3B ALL ENDS, connection_type: THREADED INTERNAL BOSS ALL ENDS, connection_style: GASKET SEAL (BOSS) ALL ENDS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-277-5026, 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
AN938D6
NSN: 4730-00-277-5026
FSC: 4730
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
materialSTEEL COMP 1137 OR STEEL COMP 1141 OR STEEL COMP 4130 OR STEEL COMP 4140 OVERALL
leg_length0.922 INCHES MINIMUM AND 0.969 INCHES MAXIMUM FIRST END IN
seat_angle37.0 DEGREES THIRD END
thread_class3B ALL ENDS
connection_typeTHREADED INTERNAL BOSS ALL ENDS
connection_styleGASKET SEAL (BOSS) ALL ENDS
surface_treatmentANODIZE OVERALL
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.562 INCHES ALL ENDS IN
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
specification/standard_data81343 - 81343 AS5198 PROFESSIONAL/INDUSTIRAL ASSOCIATION STANDARD PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
material_document_and_classificationQQ-A-225/4 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-367,T6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-225/6,T6 FED SPEC 2ND MATERIAL RESPONSE OR QQ-A-225/6,T851 FED SPEC 2ND MATERIAL RESPONSE OVERALL
NSN4730-00-277-5026
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AN938D6 · 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 INTERNAL BOSS ALL ENDS
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/4 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-367,T6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-225/6,T6 FED SPEC 2ND MATERIAL RESPONSE OR QQ-A-225/6,T851 FED SPEC 2ND MATERIAL RESPONSE OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
•
NOMINAL THREAD SIZE: 0.562 INCHES ALL ENDS IN
•
SPECIFICATION/STANDARD DATA: 88044-AN938 GOVERNMENT STANDARD
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625,TYPE 2,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL: ALUMINUM ALLOY 2014 OR ALUMINUM ALLOY 2024 OVERALL
•
OPERATING PRESSURE: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION TYPETHREADED INTERNAL BOSS ALL ENDS
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/4 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-367,T6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-225/6,T6 FED SPEC 2ND MATERIAL RESPONSE OR QQ-A-225/6,T851 FED SPEC 2ND MATERIAL RESPONSE OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
NOMINAL THREAD SIZE0.562 INCHES ALL ENDS IN
SPECIFICATION/STANDARD DATA88044-AN938 GOVERNMENT STANDARD
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TYPE 2,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIALALUMINUM ALLOY 2014 OR ALUMINUM ALLOY 2024 OVERALL
OPERATING PRESSURE3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
SURFACE TREATMENTANODIZE OVERALL
THREAD CLASS3B ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
MS28897-16CInterchangeable
interchangeable cross-reference
interchangeable
AC3255E1610Interchangeable
interchangeable cross-reference
interchangeable
AC3255E16Interchangeable
interchangeable cross-reference
interchangeable
AS4842/1Interchangeable
interchangeable cross-reference
interchangeable
AS5198Interchangeable
interchangeable cross-reference
interchangeable
AS5198-050205Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN938D6?
AN938D6 is a ADAPTER,STRAIGHT,PIPE TO BOSS.
What parts can replace AN938D6?
There are 14 known substitutes for AN938D6: MS28897-16C, AC3255E1610, AC3255E16 and 11 more. Substitute compatibility should be verified for your specific system.
Is AN938D6 still available?
AN938D6 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