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5903-0004 — PARTS KIT,AIR FLOW REGULATOR

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

5903-0004: PARTS KIT,AIR FLOW REGULATOR.

The PARTS KIT,AIR FLOW REGULATOR is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: OVERALL LENGTH 139,0MM,PORT OD DIA 39,0MM,ID 38,0MM,E/I 4920NCD161986,CAGE K0656 MM. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-378-8241, 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
5903-0004
NSN: 4820-01-378-8241
FSC: 4820 — Valves, Nonpowered
CAGE: K0656 — BAE SYSTEMS (OPERATIONS) LIMITED (GBR)
SPECIFICATIONS
general_characteristics_item_descriptionOVERALL LENGTH 139,0MM,PORT OD DIA 39,0MM,ID 38,0MM,E/I 4920NCD161986,CAGE K0656 MM
NSN4820-01-378-8241
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 5903-0004 · 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
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: OVERALL LENGTH 139,0MM,PORT OD DIA 39,0MM,ID 38,0MM,E/I 4920NCD161986,CAGE K0656 MM
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONOVERALL LENGTH 139,0MM,PORT OD DIA 39,0MM,ID 38,0MM,E/I 4920NCD161986,CAGE K0656 MM
SUBSTITUTES & CROSS-REFERENCES 1
19660Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
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 5903-0004?
5903-0004 is a PARTS KIT,AIR FLOW REGULATOR.
What parts can replace 5903-0004?
There is 1 known substitute for 5903-0004: 19660. Substitute compatibility should be verified for your specific system.
What is the NSN for 5903-0004?
5903-0004 is cataloged in the U.S. Government catalog under NSN 4820-01-378-8241. 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.