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AN8-394 — PISTON ASSEMBLY

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

AN8-394: PISTON ASSEMBLY.

The PISTON ASSEMBLY is a the manufacturer industrial component. Key specifications include end_item_identification: 1903-00-392-2981. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-278-8149, 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
AN8-394
NSN: 4730-00-278-8149
NIINs: 002788149, 012300622
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 22995 — CROWN FITTING CO INC (USA)
SPECIFICATIONS
end_item_identification1903-00-392-2981
NSN4730-00-278-8149
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AN8-394 · 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
•
FLOW ANGLE: 45.0 DEGREES
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
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CONNECTION STYLE: BEADED (HOSE) SECOND END
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NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED: 0.250 INCHES SECOND END IN
•
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST END
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MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-626,COMP 21 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
FLOW ANGLE45.0 DEGREES
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
CONNECTION STYLEBEADED (HOSE) SECOND END
CONNECTION STYLEFLARED (TUBE) FIRST END
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED0.250 INCHES SECOND END IN
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST END
CONNECTION TYPEUNTHREADED EXTERNAL HOSE SECOND END
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-626,COMP 21 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES FIRST END IN
LEG LENGTH1.422 INCHES NOMINAL FIRST END IN
SUBSTITUTES & CROSS-REFERENCES 1
SAE-AS4843/1Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AN8-394?
AN8-394 is a PISTON ASSEMBLY.
What parts can replace AN8-394?
There is 1 known substitute for AN8-394: SAE-AS4843/1. Substitute compatibility should be verified for your specific system.
What is the NSN for AN8-394?
AN8-394 is cataloged in the U.S. Government catalog under NSN 4730-00-278-8149. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
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.