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189836 ✓ 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 INVERTED NUT,TUBE COUPLING is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, thread_size: 1-1/16-16, thread_class: 2A A, overall_length: 0.880 INCHES NOMINAL IN, style_designator: INVERTED NUT, TUBE, FLARE, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-351-0449, 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
189836
NSN: 4730-00-351-0449
FSC: 4730
CAGE: 24617 — GENERAL MOTORS CORP (USA)
SPECIFICATIONS
materialCOPPER ALLOY
thread_size1-1/16-16
thread_class2A A
overall_length0.880 INCHES NOMINAL IN
style_designatorINVERTED NUT, TUBE, FLARE
thread_directionRIGHT-HAND
seat_angle_in_deg45.0
width_across_flats1.063 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
smallest_inside_diameter0.755 INCHES MINIMUM AND 0.761 INCHES MAXIMUM IN
nondefinitive_spec/std_data5A FIGURE A
screw_thread_series_designatorUN
NSN4730-00-351-0449
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 189836 · 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
•
THREAD CLASS: 2A A
•
SEAT ANGLE IN DEG: 45.0
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
SCREW THREAD SERIES DESIGNATOR: UN
•
MATERIAL: COPPER ALLOY
•
WIDTH ACROSS FLATS: 1.063 INCHES NOMINAL IN
•
THREAD SIZE: 1-1/16-16
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2A A
SEAT ANGLE IN DEG45.0
CASEHARDENING INDICATORNOT CASEHARDENED
SCREW THREAD SERIES DESIGNATORUN
OVERALL LENGTH0.880 INCHES NOMINAL IN
MATERIALCOPPER ALLOY
WIDTH ACROSS FLATS1.063 INCHES NOMINAL IN
THREAD SIZE1-1/16-16
SMALLEST INSIDE DIAMETER0.755 INCHES MINIMUM AND 0.761 INCHES MAXIMUM IN
NONDEFINITIVE SPEC/STD DATA5A FIGURE A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
24311Interchangeable
interchangeable cross-reference
interchangeable
N24311Interchangeable
interchangeable cross-reference
interchangeable
N334PC120Interchangeable
interchangeable cross-reference
interchangeable
F4689PC120Interchangeable
interchangeable cross-reference
interchangeable
N451PC120Interchangeable
interchangeable cross-reference
interchangeable
821-903Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 189836?
189836 is a INVERTED NUT,TUBE COUPLING.
What parts can replace 189836?
There are 13 known substitutes for 189836: 24311, N24311, N334PC120 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 189836?
189836 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-351-0449. 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