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640A500 — DISK,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

640A500: DISK,VALVE.

The DISK,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL, thread_class: 2A A, overall_height: 0.625 INCHES NOMINAL IN, outside_diameter: 0.875 INCHES NOMINAL IN, nominal_thread_size: 0.516 INCHES IN, thread_series_designator: UNF. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-467-6873, 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
640A500
NSN: 4820-00-467-6873
FSC: 4820 — Valves, Nonpowered
CAGE: 93366 — GE AVIATION SYSTEMS LLC DBA GE AVIATION SYSTEMS LLC (USA)
SPECIFICATIONS
materialSTEEL
thread_class2A A
overall_height0.625 INCHES NOMINAL IN
outside_diameter0.875 INCHES NOMINAL IN
nominal_thread_size0.516 INCHES IN
thread_series_designatorUNF
flange_seat_to_disk_end_height0.109 INCHES NOMINAL IN
NSN4820-00-467-6873
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 640A500 · 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
•
FLANGE SEAT TO DISK END HEIGHT: 0.109 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 0.875 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 0.516 INCHES IN
•
THREAD CLASS: 2A A
•
MATERIAL: STEEL
•
THREAD SERIES DESIGNATOR: UNF
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.109 INCHES NOMINAL IN
OVERALL HEIGHT0.625 INCHES NOMINAL IN
OUTSIDE DIAMETER0.875 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.516 INCHES IN
THREAD CLASS2A A
MATERIALSTEEL
THREAD SERIES DESIGNATORUNF
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 640A500?
640A500 is a DISK,VALVE.
What is the NSN for 640A500?
640A500 is cataloged in the U.S. Government catalog under NSN 4820-00-467-6873. 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.