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501-6398093 — GEAR SECTOR,INTERNAL

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

501-6398093: GEAR SECTOR,INTERNAL.

The GEAR SECTOR,INTERNAL is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, body_style: PLAIN, SOLID, bore_style: STRAIGHT SPLINE BOTH ENDS, pitch_radius: 3.1250 INCHES NOMINAL IN, pitch_diameter: 4.2500 INCHES NOMINAL IN, pressure_angle: 20.0000 DEGREES. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-390-8858, 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
501-6398093
NSN: 4820-01-390-8858
NIINs: 013908858, 013916428, 013918367
FSC: 4820 — Valves, Nonpowered
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
body_stylePLAIN, SOLID
bore_styleSTRAIGHT SPLINE BOTH ENDS
pitch_radius3.1250 INCHES NOMINAL IN
pitch_diameter4.2500 INCHES NOMINAL IN
pressure_angle20.0000 DEGREES
teeth_quantity17
spline_quantity10 BOTH ENDS
style_designatorPLAIN RING
features_providedHANDWHEEL
arc_nominal_length6.676 INCHES IN
face_nominal_width0.375 INCHES IN
NSN4820-01-390-8858
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 501-6398093 · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FEATURES PROVIDED: HANDWHEEL
•
MATERIAL: STEEL AND ALUMINUM ALLOY
TECHNICAL CHARACTERISTICS
FEATURES PROVIDEDHANDWHEEL
END ITEM IDENTIFICATIONOXYGEN BANK HULL STOP VALVE
MATERIALSTEEL AND ALUMINUM ALLOY
SUBSTITUTES & CROSS-REFERENCES 1
6398093 ASSY BSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 501-6398093?
501-6398093 is a GEAR SECTOR,INTERNAL.
What parts can replace 501-6398093?
There is 1 known substitute for 501-6398093: 6398093 ASSY B. Substitute compatibility should be verified for your specific system.
What is the NSN for 501-6398093?
501-6398093 is cataloged in the U.S. Government catalog under NSN 4820-01-390-8858. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.