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Technical Data Sheet
PartsTable / COMPONENT / 52525/4-6-6J
52525/4-6-6J ✓ 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 52525/4-6-6J is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-076-3280, 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
52525/4-6-6J
NSN: 4730-01-076-3280
FSC: 4730
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part Number52525/4-6-6J
NSN4730-01-076-3280
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 52525/4-6-6J · 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 TUBE FIRST END
•
CONNECTION STYLE: GRIPPING NIPPLE (NOSE) SECOND END
•
SPECIFICATION/STANDARD DATA: 81349-MIL-F-52525C GOVERNMENT SPECIFICATION
•
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED: 0.375 INCHES SECOND END IN
•
THREAD CLASS: 2B FIRST END
•
SEAT ANGLE: 37.0 DEGREES FIRST END
•
SURFACE TREATMENT: ZINC OVERALL
•
MATERIAL: IRON OR STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION TYPETHREADED INTERNAL TUBE FIRST END
CONNECTION STYLEGRIPPING NIPPLE (NOSE) SECOND END
SPECIFICATION/STANDARD DATA81349-MIL-F-52525C GOVERNMENT SPECIFICATION
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED0.375 INCHES SECOND END IN
THREAD CLASS2B FIRST END
SEAT ANGLE37.0 DEGREES FIRST END
SURFACE TREATMENTZINC OVERALL
MATERIALIRON OR STEEL OVERALL
NOMINAL THREAD SIZE0.562 INCHES FIRST END IN
FLOW ANGLE90.0 DEGREES
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
MS39293-8-8BInterchangeable
interchangeable cross-reference
interchangeable
M52525/4-8-8Interchangeable
interchangeable cross-reference
interchangeable
M52525/4-8-8JInterchangeable
interchangeable cross-reference
interchangeable
MIL-F-52525Interchangeable
interchangeable cross-reference
interchangeable
M52525/4-12-12JInterchangeable
interchangeable cross-reference
interchangeable
94-190263-12Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 52525/4-6-6J?
52525/4-6-6J is a 52525/4-6-6J.
What parts can replace 52525/4-6-6J?
There are 19 known substitutes for 52525/4-6-6J: MS39293-8-8B, M52525/4-8-8, M52525/4-8-8J and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 52525/4-6-6J?
52525/4-6-6J is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-076-3280. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026