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Technical Data Sheet
PartsTable / COMPONENT / E251525-1
E251525-1 ✓ 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,HOSE TO BOSS is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 6061 OVERALL, thread_class: 2A SECOND END A, connection_type: THREADED EXTERNAL BOSS SECOND END, connection_style: BEADED HOSE FIRST END, surface_treatment: OXIDE FILM INSIDE, nominal_thread_size: 0.250 INCHES SECOND END IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-176-4631, 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
E251525-1
NSN: 4730-00-176-4631
FSC: 4730
CAGE: 11982 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 OVERALL
thread_class2A SECOND END A
connection_typeTHREADED EXTERNAL BOSS SECOND END
connection_styleBEADED HOSE FIRST END
surface_treatmentOXIDE FILM INSIDE
nominal_thread_size0.250 INCHES SECOND END IN
nominal_overall_length0.620 INCHES IN
thread_series_designatorUNF SECOND END
material_document_and_classificationQQ-A-225/8,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
nominal_inside_diameter_hose_accommodated0.250 INCHES FIRST END IN
surface_treatment_document_and_classificationMIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE INSIDE
NSN4730-00-176-4631
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: E251525-1 · 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
•
SURFACE TREATMENT: OXIDE FILM INSIDE
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE
•
THREAD SERIES DESIGNATOR: UNF SECOND END
•
MATERIAL: ALUMINUM ALLOY 6061 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/8,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL OVERALL LENGTH: 0.620 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTOXIDE FILM INSIDE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE
THREAD SERIES DESIGNATORUNF SECOND END
MATERIALALUMINUM ALLOY 6061 OVERALL
SURFACE TREATMENTOXIDE FILM OUTSIDE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/8,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTOXIDE FILM INSIDE
NOMINAL OVERALL LENGTH0.620 INCHES IN
CONNECTION TYPEUNTHREADED EXTERNAL HOSE FIRST END
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED0.250 INCHES FIRST END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
8030000650957Interchangeable
interchangeable cross-reference
interchangeable
TURCOAT LIQUID ACCELAGOLDInterchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-81706Interchangeable
interchangeable cross-reference
interchangeable
MIL-C-5541Interchangeable
interchangeable cross-reference
interchangeable
AF66J38331Interchangeable
interchangeable cross-reference
interchangeable
M81706-1A2BInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is E251525-1?
E251525-1 is a ADAPTER,STRAIGHT,HOSE TO BOSS.
What parts can replace E251525-1?
There are 19 known substitutes for E251525-1: 8030000650957, TURCOAT LIQUID ACCELAGOLD, MIL-DTL-81706 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for E251525-1?
E251525-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-176-4631. 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