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PartsTable / COMPONENT / 421FHD-3
421FHD-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

RESISTOR,VARIABLE,WIRE WOUND,NON. Key specifications include material: STEEL, duty_type: CONTINUOUS, bore_shape: STRAIGHT, thread_class: 2A SINGLE MOUNTING FACILITY A, bore_diameter: 0.5000 INCHES NOMINAL IN, overall_width: 0.3125 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-279-7765, 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
421FHD-3
NSN: 4730-01-279-7765
FSC: 4730
CAGE: 93061 — PARKER-HANNIFIN CORP DIV FLUID SYSTEM CONNECTOR DIVISION (USA)
SPECIFICATIONS
materialSTEEL
duty_typeCONTINUOUS
bore_shapeSTRAIGHT
thread_class2A SINGLE MOUNTING FACILITY A
bore_diameter0.5000 INCHES NOMINAL IN
coil_quantity1
overall_width0.3125 INCHES NOMINAL IN
seal_quantity2
load_directionRADIAL
overall_height3.400 INCHES NOMINAL IN
overall_length1.500 INCHES NOMINAL IN
surface_finishGROUND
NSN4730-01-279-7765
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 421FHD-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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
76734Interchangeable
interchangeable cross-reference
interchangeable
893313Interchangeable
interchangeable cross-reference
interchangeable
12265597-1Interchangeable
interchangeable cross-reference
interchangeable
Z99R8Interchangeable
interchangeable cross-reference
interchangeable
Z99R8XR1CJInterchangeable
interchangeable cross-reference
interchangeable
DPW/76734Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 421FHD-3?
421FHD-3 is a RESISTOR,VARIABLE,WIRE WOUND,NON.
What parts can replace 421FHD-3?
There are 7 known substitutes for 421FHD-3: 76734, 893313, 12265597-1 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 421FHD-3?
421FHD-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-279-7765. 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