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318684-2 — WEIGHT,COUNTERBALANCE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

318684-2: WEIGHT,COUNTERBALANCE.

The WEIGHT,COUNTERBALANCE is a the manufacturer industrial component. Key specifications include special_features: U/O FLIGHT SIMULATOR,EH-1H,X,UH-1H,M,V,OV-1B,OV-1C,U-8F. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-438-0643, 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
318684-2
NSN: 4820-00-438-0643
NIINs: 004380643, 005896484
FSC: 4820 — Valves, Nonpowered
CAGE: 77068 — ALLIED-SIGNAL INC DBA ALLIED-SIGNAL AEROSPACE CO ELECTRODYNAMICS DIV (USA)
SPECIFICATIONS
special_featuresU/O FLIGHT SIMULATOR,EH-1H,X,UH-1H,M,V,OV-1B,OV-1C,U-8F
NSN4820-00-438-0643
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 318684-2 · 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
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FLOW CONTROL DEVICE: POPPET
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SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625,TYPE 2,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE
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CONNECTION STYLE: GROOVED (TUBE) ALL ENDS
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MOUNTING POSITION: HORIZONTAL OR VERTICAL
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CONNECTION TYPE: UNTHREADED CARTRIDGE ALL ENDS
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STYLE DESIGNATOR: STRAIGHT THRU DROP-IN CARTRIDGE
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OPERATING PRESSURE: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
MAXIMUM OPERATING TEMP: 275.0 FAHRENHEIT SINGLE RESPONSE DEGF
TECHNICAL CHARACTERISTICS
FLOW CONTROL DEVICEPOPPET
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TYPE 2,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE
CONNECTION STYLEGROOVED (TUBE) ALL ENDS
MOUNTING POSITIONHORIZONTAL OR VERTICAL
CONNECTION TYPEUNTHREADED CARTRIDGE ALL ENDS
STYLE DESIGNATORSTRAIGHT THRU DROP-IN CARTRIDGE
OPERATING PRESSURE3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
MAXIMUM OPERATING TEMP275.0 FAHRENHEIT SINGLE RESPONSE DEGF
DISK LOADING METHODSPRING
SURFACE TREATMENTANODIZE
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 318684-2?
318684-2 is a WEIGHT,COUNTERBALANCE.
What is the NSN for 318684-2?
318684-2 is cataloged in the U.S. Government catalog under NSN 4820-00-438-0643. 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.