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NB-3121 — RESISTOR NETWORK,FIXED,FILM

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

NB-3121: RESISTOR NETWORK,FIXED,FILM.

The RESISTOR NETWORK,FIXED,FILM is a the manufacturer industrial component. Key specifications include material: STEEL, overall_length: 4.688 INCHES NOMINAL IN, largest_outside_diameter: 0.491 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-349-7771, 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
NB-3121
NSN: 4820-00-349-7771
NIINs: 003497771, 003836735
FSC: 4820 — Valves, Nonpowered
CAGE: 82328 — DRESSER RAND CO TERRY CORP STEAM TURBINE MOTOR AND GENERATOR CO A JOINT VENTURE (USA)
SPECIFICATIONS
materialSTEEL
overall_length4.688 INCHES NOMINAL IN
largest_outside_diameter0.491 INCHES NOMINAL IN
NSN4820-00-349-7771
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: NB-3121 · 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
•
LARGEST OUTSIDE DIAMETER: 0.491 INCHES NOMINAL IN
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
LARGEST OUTSIDE DIAMETER0.491 INCHES NOMINAL IN
OVERALL LENGTH4.688 INCHES NOMINAL IN
MATERIALSTEEL
SUBSTITUTES & CROSS-REFERENCES 8
59NB3044Reference document
Same NSN cross-reference
Reference document — Secondary reference
NR3044PC59Reference document
Same NSN cross-reference
Reference document — Secondary reference
831065Reference document
Same NSN cross-reference
Reference document — Secondary reference
NH6425PC59Reference document
Same NSN cross-reference
Reference document — Secondary reference
59NR3044Reference document
Same NSN cross-reference
Reference document — Secondary reference
NB3044PC59Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is NB-3121?
NB-3121 is a RESISTOR NETWORK,FIXED,FILM.
What parts can replace NB-3121?
There are 8 known substitutes for NB-3121: 59NB3044, NR3044PC59, 831065 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for NB-3121?
NB-3121 is cataloged in the U.S. Government catalog under NSN 4820-00-349-7771. 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.