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254844 — STEM,FLUID VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

254844: STEM,FLUID VALVE.

The STEM,FLUID VALVE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, seat_angle: 30.0 DEGREES NOMINAL, inside_depth: 0.688 INCHES NOMINAL IN, bb_end_radius: 0.125 INCHES NOMINAL IN, bore_diameter: 0.5010 INCHES NOMINAL IN, overall_height: 1.188 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-487-8025, 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
254844
NSN: 4820-01-487-8025
NIINs: 014878025, 014878026, 014878174, 014878388
FSC: 4820 — Valves, Nonpowered
CAGE: 43689 — HUNTINGTON INGALLS INC DIV NEWPORT NEWS SHIPBUILDING (USA)
SPECIFICATIONS
materialCOPPER ALLOY
seat_angle30.0 DEGREES NOMINAL
inside_depth0.688 INCHES NOMINAL IN
bb_end_radius0.125 INCHES NOMINAL IN
bore_diameter0.5010 INCHES NOMINAL IN
overall_height1.188 INCHES NOMINAL IN
overall_length0.875 INCHES NOMINAL IN
shank_diameter0.813 INCHES NOMINAL IN
flange_diameter1.438 INCHES NOMINAL IN
inside_diameter0.406 INCHES NOMINAL IN
outside_diameter1.000 INCHES NOMINAL IN
overall_diameter2.250 INCHES NOMINAL IN
NSN4820-01-487-8025
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 254844 · 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
•
SHANK DIAMETER: 0.813 INCHES NOMINAL IN
•
FLANGE DIAMETER: 1.438 INCHES NOMINAL IN
•
INSIDE DEPTH: 0.688 INCHES NOMINAL IN
•
STYLE DESIGNATOR: POPPET
•
SEAT ANGLE: 30.0 DEGREES NOMINAL
•
INSIDE DIAMETER: 0.406 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.813 INCHES NOMINAL IN
FLANGE DIAMETER1.438 INCHES NOMINAL IN
OVERALL HEIGHT1.188 INCHES NOMINAL IN
INSIDE DEPTH0.688 INCHES NOMINAL IN
STYLE DESIGNATORPOPPET
SEAT ANGLE30.0 DEGREES NOMINAL
INSIDE DIAMETER0.406 INCHES NOMINAL IN
SPECIAL FEATURESNEXT HIGHER ASSEMBLY P/N 254844, MANIFOLD 3/4 STOP CHECK DISTILLING SYSTEM. MATERIAL IS QQ-C-390 ALLOY D5. SHANK HAS 3 RIBS EQUALLY SPACED WITH 1 HOLE 0.094 INCH DIAMETER 0.250 INCH FROM END. FLANGE HAS ONE HOLE 0.062 INCH DIAMETER AT SHANK. IN
UNDER FLANGE HEIGHT0.500 INCHES NOMINAL IN
MEDIA FOR WHICH DESIGNEDLIQUID
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 254844?
254844 is a STEM,FLUID VALVE.
What is the NSN for 254844?
254844 is cataloged in the U.S. Government catalog under NSN 4820-01-487-8025. 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.