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Technical Data Sheet
PartsTable / COMPONENT / MIL-F-45911
MIL-F-45911 ✓ 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

SLEEVE,COMPRESSION,TUBE-HOSE FIT. Key specifications include material: COPPER ALLOY B6 OR COPPER ALLOY TEE, leg_length: 0.984 INCHES MINIMUM AND 1.125 INCHES MAXIMUM SECOND END IN, seat_angle: 20.0 DEGREES FIRST END, thread_class: 2A THIRD END A, connection_type: THREADED EXTERNAL TUBE FIRST END, connection_style: FLARELESS (TUBE) FIRST END. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-130-4239, 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-F-45911
NSN: 4730-00-130-4239
FSC: 4730
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialCOPPER ALLOY B6 OR COPPER ALLOY TEE
leg_length0.984 INCHES MINIMUM AND 1.125 INCHES MAXIMUM SECOND END IN
seat_angle20.0 DEGREES FIRST END
thread_class2A THIRD END A
connection_typeTHREADED EXTERNAL TUBE FIRST END
connection_styleFLARELESS (TUBE) FIRST END
special_features0.4991 IN.MIN,0.5030 IN.MAX PITCH DIA IN
nominal_thread_size0.531 INCHES THIRD END IN
thread_quantity_per_inch24 FIRST END
thread_series_designatorUNS FIRST END
nondefinitive_spec/std_data3C FIGURE
specification/standard_data81343-J246 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN4730-00-130-4239
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MIL-F-45911 · 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
•
NONDEFINITIVE SPEC/STD DATA: 1B FIGURE
•
STYLE DESIGNATOR: FLARELESS W/ CENTER WRENCHING FACILITY
•
NOMINAL THREAD SIZE: 0.812 INCHES ALL ENDS IN
•
THREAD QUANTITY PER INCH: 18 FIRST END
•
SPECIFICATION/STANDARD DATA: 81343-J246 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.625 INCHES ALL ENDS IN
•
FURNISHED ITEMS AND QUANTITY: 2 TUBE COUPLING NUT W/SLEEVE
•
NOMINAL OVERALL LENGTH: 1.430 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATA1B FIGURE
STYLE DESIGNATORFLARELESS W/ CENTER WRENCHING FACILITY
NOMINAL THREAD SIZE0.812 INCHES ALL ENDS IN
THREAD QUANTITY PER INCH18 FIRST END
SPECIFICATION/STANDARD DATA81343-J246 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.625 INCHES ALL ENDS IN
FURNISHED ITEMS AND QUANTITY2 TUBE COUPLING NUT W/SLEEVE
NOMINAL OVERALL LENGTH1.430 INCHES IN
MATERIALCOPPER ALLOY OVERALL
CONNECTION STYLEFLARELESS (TUBE) ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
205418Interchangeable
interchangeable cross-reference
interchangeable
J246Interchangeable
interchangeable cross-reference
interchangeable
BB9168Interchangeable
interchangeable cross-reference
interchangeable
10-12 120102BAInterchangeable
interchangeable cross-reference
interchangeable
SAE J246 10-12 120102BAInterchangeable
interchangeable cross-reference
interchangeable
535TRInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-F-45911?
MIL-F-45911 is a SLEEVE,COMPRESSION,TUBE-HOSE FIT.
What parts can replace MIL-F-45911?
There are 30 known substitutes for MIL-F-45911: 205418, J246, BB9168 and 27 more. Substitute compatibility should be verified for your specific system.
Is MIL-F-45911 still available?
MIL-F-45911 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