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Technical Data Sheet
PartsTable / COMPONENT / 121-1903
121-1903 ✓ Verified by PartsTable
— · GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

RESISTOR,VARIABLE,NONWIRE WOUND,. Key specifications include material: STEEL COMP 420 OVERALL, body_style: STRAIGHT SHAPE, INTERNAL COUPLING, scale_name: FUEL, scale_type: CONCENTRIC ARC DIAL, shell_type: SOLID, shock_mount: PROVIDED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-132-6866, 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
121-1903
NSN: 4820-01-132-6866
FSC: 4820
CAGE: 19139 — EASTMAN KODAK CO (USA)
SPECIFICATIONS
materialSTEEL COMP 420 OVERALL
body_styleSTRAIGHT SHAPE, INTERNAL COUPLING
scale_nameFUEL
scale_typeCONCENTRIC ARC DIAL
shell_typeSOLID
shock_mountPROVIDED
thread_class2A A
overall_width0.562 INCHES NOMINAL IN
terminal_typeCONNECTOR, RECEPTACLE W/EXTERNAL CONTACTS AND CONNECTOR, RECEPTACLE W/INTERNAL CONTACTS
actuation_typeBOURDON TUBE
overall_length2.750 INCHES NOMINAL IN
shell_materialCOPPER ALLOY
NSN4820-01-132-6866
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 121-1903 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
360-HZInterchangeable
interchangeable cross-reference
interchangeable
490-ZFInterchangeable
interchangeable cross-reference
interchangeable
82320Interchangeable
interchangeable cross-reference
interchangeable
82-320AInterchangeable
interchangeable cross-reference
interchangeable
REB49364Interchangeable
interchangeable cross-reference
interchangeable
GC810GM1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 121-1903?
121-1903 is a RESISTOR,VARIABLE,NONWIRE WOUND,.
What parts can replace 121-1903?
There are 15 known substitutes for 121-1903: 360-HZ, 490-ZF, 82320 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 121-1903?
121-1903 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-132-6866. 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