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820-4445808-12 — STOP CHECK VALVE SPECIAL

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

820-4445808-12: STOP CHECK VALVE SPECIAL.

The STOP CHECK VALVE SPECIAL is a the manufacturer industrial component. Key specifications include criticality_code_justification: ZZZY, general_characteristics_item_description: POLYTETRAFLUOROETHYLENE ASBESTOS 3/4X1-1/8X3/16. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-077-7605, 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
820-4445808-12
NSN: 4820-01-077-7605
NIINs: 010777605, 011080781
FSC: 4820 — Valves, Nonpowered
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
criticality_code_justificationZZZY
general_characteristics_item_descriptionPOLYTETRAFLUOROETHYLENE ASBESTOS 3/4X1-1/8X3/16
reference_number_differentiating_characteristicsMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
NSN4820-01-077-7605
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 820-4445808-12 · 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
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: SELECTED AND TESTED FOR NUCLEAR PROPULSION PLANT SYSTEMS
TECHNICAL CHARACTERISTICS
CRITICALITY CODE JUSTIFICATIONZZZY
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSSELECTED AND TESTED FOR NUCLEAR PROPULSION PLANT SYSTEMS
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Demilitarization required (F)
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FREQUENTLY ASKED QUESTIONS
What is 820-4445808-12?
820-4445808-12 is a STOP CHECK VALVE SPECIAL.
What is the NSN for 820-4445808-12?
820-4445808-12 is cataloged in the U.S. Government catalog under NSN 4820-01-077-7605. 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.