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2640-009ASSY1 — LOCKING DEVICE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

2640-009ASSY1: LOCKING DEVICE.

The LOCKING DEVICE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY, end_item_identification: SEAWOLF CLASS SSN, general_characteristics_item_description: BRAIDED 0.125 IN.DIA; LOCKED OPEN IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-415-7928, 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
2640-009ASSY1
NSN: 4820-01-415-7928
FSC: 4820 — Valves, Nonpowered
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialNICKEL ALLOY
end_item_identificationSEAWOLF CLASS SSN
general_characteristics_item_descriptionBRAIDED 0.125 IN.DIA; LOCKED OPEN IN
NSN4820-01-415-7928
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 2640-009ASSY1 · 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
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: BRAIDED 0.125 IN.DIA; LOCKED OPEN IN
•
MATERIAL: NICKEL ALLOY
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONBRAIDED 0.125 IN.DIA; LOCKED OPEN IN
END ITEM IDENTIFICATIONSEAWOLF CLASS SSN
MATERIALNICKEL ALLOY
SUBSTITUTES & CROSS-REFERENCES 2
2640-009Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
1889758Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 2640-009ASSY1?
2640-009ASSY1 is a LOCKING DEVICE.
What parts can replace 2640-009ASSY1?
There are 2 known substitutes for 2640-009ASSY1: 2640-009, 1889758. Substitute compatibility should be verified for your specific system.
What is the NSN for 2640-009ASSY1?
2640-009ASSY1 is cataloged in the U.S. Government catalog under NSN 4820-01-415-7928. 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.