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4429K191 ✓ 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 BAR,T,TELETYPEWRITER is a the manufacturer industrial component. Key specifications include material: BRASS OVERALL, drive_end_style: RECESSED SQUARE, connection_style: SOCKET, nominal_thread_size: 0.500 INCHES EXTERNAL IN, end_item_identification: 6115-01-591-1161; GENERATOR, HEATING AND AIR CONDITIONER, thread_series_designator: NPT EXTERNAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-649-2781, 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
4429K191
NSN: 4730-01-649-2781
FSC: 4730
CAGE: 3A054 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialBRASS OVERALL
drive_end_styleRECESSED SQUARE
connection_styleSOCKET
nominal_thread_size0.500 INCHES EXTERNAL IN
end_item_identification6115-01-591-1161; GENERATOR, HEATING AND AIR CONDITIONER
thread_series_designatorNPT EXTERNAL
part_name_assigned_by_controlling_agencyLOW-PRESSURE BRASS THREADED PIPE FITTING
NSN4730-01-649-2781
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4429K191 · 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
•
DRIVE END STYLE: RECESSED SQUARE
•
CONNECTION STYLE: SOCKET
•
THREAD SERIES DESIGNATOR: NPT EXTERNAL
•
NOMINAL THREAD SIZE: 0.500 INCHES EXTERNAL IN
•
MATERIAL: BRASS OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
DRIVE END STYLERECESSED SQUARE
CONNECTION STYLESOCKET
END ITEM IDENTIFICATION6115-01-591-1161; GENERATOR, HEATING AND AIR CONDITIONER
THREAD SERIES DESIGNATORNPT EXTERNAL
NOMINAL THREAD SIZE0.500 INCHES EXTERNAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYLOW-PRESSURE BRASS THREADED PIPE FITTING
MATERIALBRASS OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
SC-C-70017-21Interchangeable
interchangeable cross-reference
interchangeable
SM-C-426574Interchangeable
interchangeable cross-reference
interchangeable
50074AInterchangeable
interchangeable cross-reference
interchangeable
SAW4201TInterchangeable
interchangeable cross-reference
interchangeable
62231Interchangeable
interchangeable cross-reference
interchangeable
7793R.H-02Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4429K191?
4429K191 is a BAR,T,TELETYPEWRITER.
What parts can replace 4429K191?
There are 6 known substitutes for 4429K191: SC-C-70017-21, SM-C-426574, 50074A and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4429K191?
4429K191 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-649-2781. 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