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444687 ✓ 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

PARTS KIT,BEARING REPLACEMENT,ME. Key specifications include material: STEEL OVERALL, end_style: SPRING END,SQUARED AND GROUND BOTH ENDS, coil_quantity: 12, inside_diameter: 0.375 INCHES NOMINAL IN, style_designator: CYLINDRICAL, spring_free_length: 1.047 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-018-9566, 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
444687
NSN: 4730-00-018-9566
FSC: 4730
CAGE: 72582 — ROLLS-ROYCE SOLUTIONS AMERICA INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
end_styleSPRING END,SQUARED AND GROUND BOTH ENDS
coil_quantity12
inside_diameter0.375 INCHES NOMINAL IN
style_designatorCYLINDRICAL
spring_free_length1.047 INCHES NOMINAL IN
spring_solid_length0.625 INCHES NOMINAL IN
coil_helix_directionRIGHT-HAND OR LEFT-HAND
spring_deflection_rate9.350 POUNDS PER INCH NOMINAL LBS
spring_free_outside_diameter0.469 INCHES NOMINAL IN
NSN4730-00-018-9566
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 444687 · 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 32
53338Interchangeable
interchangeable cross-reference
interchangeable
50658Interchangeable
interchangeable cross-reference
interchangeable
2136700G001Interchangeable
interchangeable cross-reference
interchangeable
X-100REDInterchangeable
interchangeable cross-reference
interchangeable
B67077Interchangeable
interchangeable cross-reference
interchangeable
1225829-28Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 444687?
444687 is a PARTS KIT,BEARING REPLACEMENT,ME.
What parts can replace 444687?
There are 32 known substitutes for 444687: 53338, 50658, 2136700G001 and 29 more. Substitute compatibility should be verified for your specific system.
Is 444687 still available?
444687 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