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177643 — SLEEVE AND SLIDE,DIRECTIONAL CON

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

177643: SLEEVE AND SLIDE,DIRECTIONAL CON.

SLEEVE AND SLIDE,DIRECTIONAL CON. Key specifications include end_item_identification: GRUMMAN AEROSPACE CORP MODELS 89H1062 AND 177590 HYDRAULIC SERVOVALVES, valve_design_control_activity: 26512. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-305-4393, 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
177643
NSN: 4820-00-305-4393
FSC: 4820 — Valves, Nonpowered
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
end_item_identificationGRUMMAN AEROSPACE CORP MODELS 89H1062 AND 177590 HYDRAULIC SERVOVALVES
valve_design_control_activity26512
NSN4820-00-305-4393
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 177643 · 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: 26512
TECHNICAL CHARACTERISTICS
VALVE DESIGN CONTROL ACTIVITY26512
END ITEM IDENTIFICATIONGRUMMAN AEROSPACE CORP MODELS 89H1062 AND 177590 HYDRAULIC SERVOVALVES
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
177643-2Same 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 177643?
177643 is a SLEEVE AND SLIDE,DIRECTIONAL CON.
What parts can replace 177643?
There is 1 known substitute for 177643: 177643-2. Substitute compatibility should be verified for your specific system.
What is the NSN for 177643?
177643 is cataloged in the U.S. Government catalog under NSN 4820-00-305-4393. 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.