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87577-3309ITEM2 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

87577-3309ITEM2: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: RUBBER URETHANE OVERALL, overall_height: 1.750 INCHES NOMINAL IN, style_designator: PLAIN, body_inside_diameter: 10.750 INCHES NOMINAL IN, body_outside_diameter: 15.750 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-065-1888, 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
87577-3309ITEM2
NSN: 4820-01-065-1888
FSC: 4820 — Valves, Nonpowered
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialRUBBER URETHANE OVERALL
overall_height1.750 INCHES NOMINAL IN
style_designatorPLAIN
body_inside_diameter10.750 INCHES NOMINAL IN
body_outside_diameter15.750 INCHES NOMINAL IN
NSN4820-01-065-1888
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 87577-3309ITEM2 · 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: 15.750 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLAIN
•
BODY INSIDE DIAMETER: 10.750 INCHES NOMINAL IN
•
MATERIAL: RUBBER URETHANE OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.750 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER15.750 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN
BODY INSIDE DIAMETER10.750 INCHES NOMINAL IN
MATERIALRUBBER URETHANE OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
609-4676629ITEM2Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
609-4676629Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Shelf-life managedAcquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 87577-3309ITEM2?
87577-3309ITEM2 is a SEAT,VALVE.
What parts can replace 87577-3309ITEM2?
There are 2 known substitutes for 87577-3309ITEM2: 609-4676629ITEM2, 609-4676629. Substitute compatibility should be verified for your specific system.
What is the NSN for 87577-3309ITEM2?
87577-3309ITEM2 is cataloged in the U.S. Government catalog under NSN 4820-01-065-1888. 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.