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PartsTable / COMPONENT / MILH24135-12TYC
MILH24135-12TYC ✓ 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: NICKEL ALLOY A OVERALL, thread_class: 3A SECOND END A, connection_type: THREADED EXTERNAL BOSS SECOND END, connection_style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END, nominal_thread_size: 1.750 INCHES SECOND END IN, nominal_overall_length: 4.000 INCHES 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 4730-00-257-4924, 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
MILH24135-12TYC
NSN: 4730-00-257-4924
FSC: 4730
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialNICKEL ALLOY A OVERALL
thread_class3A SECOND END A
connection_typeTHREADED EXTERNAL BOSS SECOND END
connection_styleEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
nominal_thread_size1.750 INCHES SECOND END IN
nominal_overall_length4.000 INCHES IN
thread_quantity_per_inch12 SECOND END
thread_series_designatorUN SECOND END
nondefinitive_spec/std_dataC TYPE
furnished_items_and_quantity1 HOSE COUPLING NUT
criticality_code_justificationZZZX
departure_from_cited_designatorQUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
NSN4730-00-257-4924
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MILH24135-12TYC · 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
•
CRITICALITY CODE JUSTIFICATION: ZZZX
•
THREAD CLASS: 3A SECOND END A
•
NONDEFINITIVE SPEC/STD DATA: C TYPE
•
CONNECTION STYLE: GRIPPING NIPPLE (NOSE) FIRST END
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281,CL A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: NICKEL ALLOY A OVERALL
•
DEPARTURE FROM CITED DESIGNATOR: QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
TECHNICAL CHARACTERISTICS (FLIS)
CRITICALITY CODE JUSTIFICATIONZZZX
THREAD CLASS3A SECOND END A
NONDEFINITIVE SPEC/STD DATAC TYPE
CONNECTION STYLEGRIPPING NIPPLE (NOSE) FIRST END
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281,CL A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CONNECTION STYLEEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
MATERIALNICKEL ALLOY A OVERALL
DEPARTURE FROM CITED DESIGNATORQUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
NOMINAL OUTSIDE DIAMETER HOSE ACCOMMODATED1.500 INCHES FIRST END IN
THREAD SERIES DESIGNATORUN SECOND END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
MIL-H-24135L1Interchangeable
interchangeable cross-reference
interchangeable
MIL-H-24135Interchangeable
interchangeable cross-reference
interchangeable
FC7183-1212-4L1Interchangeable
interchangeable cross-reference
interchangeable
2621-225-03 ASSY 114RInterchangeable
interchangeable cross-reference
interchangeable
FC7182-0812-4Interchangeable
interchangeable cross-reference
interchangeable
2621-225-03ASSY114RL1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MILH24135-12TYC?
MILH24135-12TYC is a ADAPTER,STRAIGHT,HOSE TO BOSS.
What parts can replace MILH24135-12TYC?
There are 10 known substitutes for MILH24135-12TYC: MIL-H-24135L1, MIL-H-24135, FC7183-1212-4L1 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MILH24135-12TYC?
MILH24135-12TYC is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-257-4924. 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