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556-6408576 — STEM,FLUID VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

556-6408576: STEM,FLUID VALVE.

The STEM,FLUID VALVE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, seat_radius: 0.406 INCHES NOMINAL IN, overall_height: 0.469 INCHES NOMINAL IN, overall_length: 5.600 INCHES NOMINAL IN, style_designator: PLAIN, features_provided: SPLINED. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-352-3773, 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
556-6408576
NSN: 4820-01-352-3773
NIINs: 013523773, 013523829
FSC: 4820 — Valves, Nonpowered
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialCOPPER ALLOY
seat_radius0.406 INCHES NOMINAL IN
overall_height0.469 INCHES NOMINAL IN
overall_length5.600 INCHES NOMINAL IN
style_designatorPLAIN
features_providedSPLINED
body_inside_diameter3.537 INCHES NOMINAL IN
body_outside_diameter3.870 INCHES NOMINAL IN
seating_surface_shapeRADIAL
stem_actuating_end_typeROUNDED
largest_outside_diameter2.116 INCHES NOMINAL IN
valve_size_for_which_designed2.500 INCHES AND 3.000 INCHES IN
NSN4820-01-352-3773
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 556-6408576 · 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
•
BODY OUTSIDE DIAMETER: 3.870 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLAIN
•
BODY INSIDE DIAMETER: 3.537 INCHES NOMINAL IN
•
SEAT RADIUS: 0.406 INCHES NOMINAL IN
•
MATERIAL: PLASTIC POLYAMIDE NYLON OVERALL
•
SEATING SURFACE SHAPE: RADIAL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.469 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER3.870 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN
BODY INSIDE DIAMETER3.537 INCHES NOMINAL IN
SEAT RADIUS0.406 INCHES NOMINAL IN
MATERIALPLASTIC POLYAMIDE NYLON OVERALL
SEATING SURFACE SHAPERADIAL
SUBSTITUTES & CROSS-REFERENCES 3
6408576 FIND 10Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
556-6408576-10Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
DF330686 FIND 10Same 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 556-6408576?
556-6408576 is a STEM,FLUID VALVE.
What parts can replace 556-6408576?
There are 3 known substitutes for 556-6408576: 6408576 FIND 10, 556-6408576-10, DF330686 FIND 10. Substitute compatibility should be verified for your specific system.
What is the NSN for 556-6408576?
556-6408576 is cataloged in the U.S. Government catalog under NSN 4820-01-352-3773. 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.