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603901DC — STEM,FLUID VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

603901DC: STEM,FLUID VALVE.

The STEM,FLUID VALVE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY, overall_length: 3.875 INCHES NOMINAL IN, stem_actuating_end_type: SQUARE AND THREADED EXTERNALLY, largest_outside_diameter: 0.688 INCHES NOMINAL IN, furnished_items_and_quantity: 1 DISK, valve_size_for_which_designed: 0.250 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-412-0308, 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
603901DC
NSN: 4820-01-412-0308
FSC: 4820 — Valves, Nonpowered
CAGE: 99565 — ADMIRAL VALVE LLC DBA CPV MANUFACTURING (USA)
SPECIFICATIONS
materialNICKEL ALLOY
overall_length3.875 INCHES NOMINAL IN
stem_actuating_end_typeSQUARE AND THREADED EXTERNALLY
largest_outside_diameter0.688 INCHES NOMINAL IN
furnished_items_and_quantity1 DISK
valve_size_for_which_designed0.250 INCHES IN
valve_type_for_which_designedGLOBE
valve_model_number_for_which_designedPSSSN21C-505
NSN4820-01-412-0308
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 603901DC · 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
•
FURNISHED ITEMS AND QUANTITY: 1 DISK
•
VALVE TYPE FOR WHICH DESIGNED: GLOBE
•
LARGEST OUTSIDE DIAMETER: 0.688 INCHES NOMINAL IN
•
STEM ACTUATING END TYPE: SQUARE AND THREADED EXTERNALLY
•
VALVE MODEL NUMBER FOR WHICH DESIGNED: PSSSN21C-505
•
VALVE SIZE FOR WHICH DESIGNED: 0.250 INCHES IN
•
MATERIAL: NICKEL ALLOY
TECHNICAL CHARACTERISTICS
FURNISHED ITEMS AND QUANTITY1 DISK
VALVE TYPE FOR WHICH DESIGNEDGLOBE
LARGEST OUTSIDE DIAMETER0.688 INCHES NOMINAL IN
STEM ACTUATING END TYPESQUARE AND THREADED EXTERNALLY
VALVE MODEL NUMBER FOR WHICH DESIGNEDPSSSN21C-505
OVERALL LENGTH3.875 INCHES NOMINAL IN
VALVE SIZE FOR WHICH DESIGNED0.250 INCHES IN
MATERIALNICKEL ALLOY
SUBSTITUTES & CROSS-REFERENCES 2
PLC-11401 PIECE 4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
PLC-11401-4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 603901DC?
603901DC is a STEM,FLUID VALVE.
What parts can replace 603901DC?
There are 2 known substitutes for 603901DC: PLC-11401 PIECE 4, PLC-11401-4. Substitute compatibility should be verified for your specific system.
What is the NSN for 603901DC?
603901DC is cataloged in the U.S. Government catalog under NSN 4820-01-412-0308. 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.