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Technical Data Sheet
PartsTable / COMPONENT / 4C50X-S
4C50X-S ✓ 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

RESISTOR,VARIABLE,WIRE WOUND,NON. Key specifications include material: STEEL OVERALL, thread_class: 2A ALL ENDS A, nominal_thread_size: 0.438 INCHES ALL ENDS IN, end_item_identification: 3990-01-442-1939 BAP (BRIDGE ADAPTER PALLET), thread_quantity_per_inch: 20 ALL ENDS, thread_series_designator: UN ALL ENDS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-585-2309, 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
4C50X-S
NSN: 4730-00-585-2309
FSC: 4730
CAGE: 30780 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV TUBE FITTINGS DIVISION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thread_class2A ALL ENDS A
nominal_thread_size0.438 INCHES ALL ENDS IN
end_item_identification3990-01-442-1939 BAP (BRIDGE ADAPTER PALLET)
thread_quantity_per_inch20 ALL ENDS
thread_series_designatorUN ALL ENDS
furnished_items_and_quantity1 PREFORMED PACKING
nominal_outside_diameter_tube_accommodated0.250 INCHES ALL ENDS IN
NSN4730-00-585-2309
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4C50X-S · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
17K3Interchangeable
interchangeable cross-reference
interchangeable
9183228Interchangeable
interchangeable cross-reference
interchangeable
301SA709Interchangeable
interchangeable cross-reference
interchangeable
16556Interchangeable
interchangeable cross-reference
interchangeable
4C50X-SInterchangeable
interchangeable cross-reference
interchangeable
35279876Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4C50X-S?
4C50X-S is a RESISTOR,VARIABLE,WIRE WOUND,NON.
What parts can replace 4C50X-S?
There are 16 known substitutes for 4C50X-S: 17K3, 9183228, 301SA709 and 13 more. Substitute compatibility should be verified for your specific system.
Is 4C50X-S still available?
4C50X-S 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