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5551978-19 — SLEEVE AND SLIDE,DIRECTIONAL CON

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

5551978-19: SLEEVE AND SLIDE,DIRECTIONAL CON.

SLEEVE AND SLIDE,DIRECTIONAL CON. Key specifications include special_features: CONSIST OF P/N 2815278-1 LUG;P/N 2815279-1 PIN; P/N 4815280-1 TWO PLUGS;P1N 4549338-501 SLIDE+P/N 4815281-1 SLEEVE, valve_design_control_activity: 88277. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-732-9077, 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
5551978-19
NSN: 4820-00-732-9077
FSC: 4820 — Valves, Nonpowered
CAGE: 0EUD7 — UNITED AERONAUTICAL CORPORATION DBA UNITED AERONAUTICAL CORP (USA)
SPECIFICATIONS
special_featuresCONSIST OF P/N 2815278-1 LUG;P/N 2815279-1 PIN; P/N 4815280-1 TWO PLUGS;P1N 4549338-501 SLIDE+P/N 4815281-1 SLEEVE
valve_design_control_activity88277
NSN4820-00-732-9077
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 5551978-19 · 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
•
VALVE DESIGN CONTROL ACTIVITY: 88277
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESCONSIST OF P/N 2815278-1 LUG;P/N 2815279-1 PIN; P/N 4815280-1 TWO PLUGS;P1N 4549338-501 SLIDE+P/N 4815281-1 SLEEVE
VALVE DESIGN CONTROL ACTIVITY88277
OTHER ITEMS IN FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES 1
5551978Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 5551978-19?
5551978-19 is a SLEEVE AND SLIDE,DIRECTIONAL CON.
What parts can replace 5551978-19?
There is 1 known substitute for 5551978-19: 5551978. Substitute compatibility should be verified for your specific system.
What is the NSN for 5551978-19?
5551978-19 is cataloged in the U.S. Government catalog under NSN 4820-00-732-9077. 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.