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AT59643 — VALVE,CHECK

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

AT59643: VALVE,CHECK.

The VALVE,CHECK is a the manufacturer industrial component. Key specifications include thread_class: 2A ALL ENDS A, connection_type: THREADED EXTERNAL TUBE FIRST END, thread_direction: RIGHT-HAND ALL ENDS, nominal_thread_size: 1.875 INCHES ALL ENDS IN, thread_quantity_per_inch: 12 ALL ENDS, thread_series_designator: UN ALL ENDS. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-313-4540, 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
AT59643
NSN: 4820-01-313-4540
FSC: 4820 — Valves, Nonpowered
CAGE: 75755 — DEERE & COMPANY DBA DEERE JOHN CO (USA)
SPECIFICATIONS
thread_class2A ALL ENDS A
connection_typeTHREADED EXTERNAL TUBE FIRST END
thread_directionRIGHT-HAND ALL ENDS
nominal_thread_size1.875 INCHES ALL ENDS IN
thread_quantity_per_inch12 ALL ENDS
thread_series_designatorUN ALL ENDS
NSN4820-01-313-4540
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: AT59643 · 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
•
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST END
•
THREAD DIRECTION: RIGHT-HAND ALL ENDS
•
NOMINAL THREAD SIZE: 1.875 INCHES ALL ENDS IN
•
THREAD CLASS: 2A ALL ENDS A
•
THREAD QUANTITY PER INCH: 12 ALL ENDS
•
THREAD SERIES DESIGNATOR: UN ALL ENDS
TECHNICAL CHARACTERISTICS
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST END
CONNECTION TYPETHREADED INTERNAL TUBE SECOND END
THREAD DIRECTIONRIGHT-HAND ALL ENDS
NOMINAL THREAD SIZE1.875 INCHES ALL ENDS IN
THREAD CLASS2A ALL ENDS A
THREAD QUANTITY PER INCH12 ALL ENDS
THREAD SERIES DESIGNATORUN ALL ENDS
SUBSTITUTES & CROSS-REFERENCES 1
5440ASame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AT59643?
AT59643 is a VALVE,CHECK.
What parts can replace AT59643?
There is 1 known substitute for AT59643: 5440A. Substitute compatibility should be verified for your specific system.
What is the NSN for AT59643?
AT59643 is cataloged in the U.S. Government catalog under NSN 4820-01-313-4540. 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.