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Technical Data Sheet
PartsTable / COMPONENT / 9958646
9958646 ✓ 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

CONNECTOR,MULTIPLE,FLUID PRESSUR. Key specifications include material: COPPER ALLOY, thickness: 0.563 INCHES NOMINAL IN, thread_size: 7/16 IN.-24 LOCATION NOT OTHERWISE SPECIFIED IN, thread_class: 2B LOCATION NOT OTHERWISE SPECIFIED, overall_width: 0.813 INCHES NOMINAL IN, overall_length: 1.094 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-729-6378, 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
9958646
NSN: 4730-00-729-6378
FSC: 4730
CAGE: 18876 — US ARMY AVIATION AND MISSILE COMMAND (USA)
SPECIFICATIONS
materialCOPPER ALLOY
thickness0.563 INCHES NOMINAL IN
thread_size7/16 IN.-24 LOCATION NOT OTHERWISE SPECIFIED IN
thread_class2B LOCATION NOT OTHERWISE SPECIFIED
overall_width0.813 INCHES NOMINAL IN
overall_length1.094 INCHES NOMINAL IN
connection_styleINVERTED FLARE LOCATION NOT OTHERWISE SPECIFIED
style_designator1 FLUID CONNECTIONS
thread_directionRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
thread_provisionTHREADED LOCATION NOT OTHERWISE SPECIFIED
seat_angle_in_deg42.0 LOCATION NOT OTHERWISE SPECIFIED
surface_treatmentZINC
NSN4730-00-729-6378
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 9958646 · 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
•
BOLT HOLE FLUID PASSAGE: PROVIDED
•
CONNECTION STYLE: INVERTED FLARE LOCATION NOT OTHERWISE SPECIFIED
•
SCREW THREAD SERIES DESIGNATOR: UNS LOCATION NOT OTHERWISE SPECIFIED
•
FLUID CONNECTION QUANTITY: 1 LOCATION NOT OTHERWISE SPECIFIED
•
MATERIAL: COPPER ALLOY
•
FLUID CONVEYANCE TYPE AND SIZE FOR WHICH DESIGNED: 1/4 IN. OD TUBE IN
•
THICKNESS: 0.563 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
BOLT HOLE FLUID PASSAGEPROVIDED
OVERALL WIDTH0.813 INCHES NOMINAL IN
CONNECTION STYLEINVERTED FLARE LOCATION NOT OTHERWISE SPECIFIED
SCREW THREAD SERIES DESIGNATORUNS LOCATION NOT OTHERWISE SPECIFIED
FLUID CONNECTION QUANTITY1 LOCATION NOT OTHERWISE SPECIFIED
MATERIALCOPPER ALLOY
FLUID CONVEYANCE TYPE AND SIZE FOR WHICH DESIGNED1/4 IN. OD TUBE IN
THICKNESS0.563 INCHES NOMINAL IN
SEAT ANGLE IN DEG42.0 LOCATION NOT OTHERWISE SPECIFIED
OVERALL LENGTH1.094 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
965562R91Interchangeable
interchangeable cross-reference
interchangeable
M219Interchangeable
interchangeable cross-reference
interchangeable
2678Interchangeable
interchangeable cross-reference
interchangeable
4002678Interchangeable
interchangeable cross-reference
interchangeable
4002687-4Interchangeable
interchangeable cross-reference
interchangeable
663070Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 9958646?
9958646 is a CONNECTOR,MULTIPLE,FLUID PRESSUR.
What parts can replace 9958646?
There are 9 known substitutes for 9958646: 965562R91, M219, 2678 and 6 more. Substitute compatibility should be verified for your specific system.
Is 9958646 still available?
9958646 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