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Technical Data Sheet
PartsTable / COMPONENT / MIL-DTL-52525/1B
MIL-DTL-52525/1B ✓ 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 MIL-DTL-52525/1B is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-076-1515, 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
MIL-DTL-52525/1B
NSN: 4730-01-076-1515
FSC: 4730
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberMIL-DTL-52525/1B
NSN4730-01-076-1515
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MIL-DTL-52525/1B · 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
•
SEAT ANGLE: 37.0 DEGREES FIRST END
•
MATERIAL: STEEL OR IRON OVERALL
•
MEDIA FOR WHICH DESIGNED: HYDRAULIC FLUID SINGLE RESPONSE
•
SPECIFICATION/STANDARD DATA: 81349-MIL-F-52525C GOVERNMENT SPECIFICATION
•
NOMINAL THREAD SIZE: 0.750 INCHES FIRST END IN
•
THREAD SERIES DESIGNATOR: UNF FIRST END
•
OPERATING PRESSURE: 4000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
CONNECTION STYLE: GRIPPING NIPPLE (NOSE) SECOND END
TECHNICAL CHARACTERISTICS (FLIS)
SEAT ANGLE37.0 DEGREES FIRST END
MATERIALSTEEL OR IRON OVERALL
MEDIA FOR WHICH DESIGNEDHYDRAULIC FLUID SINGLE RESPONSE
SPECIFICATION/STANDARD DATA81349-MIL-F-52525C GOVERNMENT SPECIFICATION
NOMINAL THREAD SIZE0.750 INCHES FIRST END IN
THREAD SERIES DESIGNATORUNF FIRST END
OPERATING PRESSURE4000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
CONNECTION STYLEGRIPPING NIPPLE (NOSE) SECOND END
CONNECTION TYPETHREADED EXTERNAL HOSE GRIPPING SECOND END
THREAD CLASS2B FIRST END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
MIL-DTL-52525/1Interchangeable
interchangeable cross-reference
interchangeable
MS39290-8-8BInterchangeable
interchangeable cross-reference
interchangeable
M52525/1-8-8Interchangeable
interchangeable cross-reference
interchangeable
4721-6Interchangeable
interchangeable cross-reference
interchangeable
4721-12Interchangeable
interchangeable cross-reference
interchangeable
4721-12SInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-DTL-52525/1B?
MIL-DTL-52525/1B is a MIL-DTL-52525/1B.
What parts can replace MIL-DTL-52525/1B?
There are 25 known substitutes for MIL-DTL-52525/1B: MIL-DTL-52525/1, MS39290-8-8B, M52525/1-8-8 and 22 more. Substitute compatibility should be verified for your specific system.
Is MIL-DTL-52525/1B still available?
MIL-DTL-52525/1B 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