PartsTable
Technical Data Sheet
MS39191-3 ✓ 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: 0.812 INCHES NOMINAL THIRD END IN, seat_angle: 20.0 DEGREES FIRST END, thread_class: 2A FIRST END A, connection_type: THREADED EXTERNAL TUBE THIRD END, connection_style: FLARELESS (TUBE) THIRD END. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-930-6354, 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
MS39191-3
NSN: 4730-00-930-6354
FSC: 4730
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialCOPPER ALLOY B6 OR COPPER ALLOY TEE
leg_length0.812 INCHES NOMINAL THIRD END IN
seat_angle20.0 DEGREES FIRST END
thread_class2A FIRST END A
connection_typeTHREADED EXTERNAL TUBE THIRD END
connection_styleFLARELESS (TUBE) THIRD 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 THIRD END
thread_series_designatorUNS FIRST END
nondefinitive_spec/std_data3C FIGURE
specification/standard_data81343-J246 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN4730-00-930-6354
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS39191-3 · 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 EXTERNAL PIPE SECOND END
THREAD CLASS: 2A THIRD END A
SEAT ANGLE: 20.0 DEGREES THIRD END
CONNECTION STYLE: FLARELESS (TUBE) THIRD END
NOMINAL THREAD SIZE: 0.531 INCHES FIRST END IN
THREAD QUANTITY PER INCH: 24 THIRD END
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION TYPETHREADED EXTERNAL PIPE SECOND END
THREAD CLASS2A THIRD END A
SEAT ANGLE20.0 DEGREES THIRD END
CONNECTION STYLEFLARELESS (TUBE) THIRD END
CONNECTION STYLEPLAIN (PIPE) SECOND END
NOMINAL THREAD SIZE0.531 INCHES FIRST END IN
NOMINAL THREAD SIZE0.375 INCHES SECOND END IN
THREAD QUANTITY PER INCH24 THIRD END
THREAD QUANTITY PER INCH24 FIRST END
NOMINAL THREAD SIZE0.531 INCHES THIRD END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
J246Interchangeable
interchangeable cross-reference
interchangeable
972906R91Interchangeable
interchangeable cross-reference
interchangeable
62AB-10Interchangeable
interchangeable cross-reference
interchangeable
205418Interchangeable
interchangeable cross-reference
interchangeable
BB9168Interchangeable
interchangeable cross-reference
interchangeable
10-12 120102BAInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS39191-3?
MS39191-3 is a SLEEVE,COMPRESSION,TUBE-HOSE FIT.
What parts can replace MS39191-3?
There are 25 known substitutes for MS39191-3: J246, 972906R91, 62AB-10 and 22 more. Substitute compatibility should be verified for your specific system.
Is MS39191-3 still available?
MS39191-3 is currently cancelled.
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