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Technical Data Sheet
PartsTable / COMPONENT / M81940/1-2
M81940/1-2 ✓ Verified by PartsTable
— · GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

The M81940/1-2 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-322-7580, 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
M81940/1-2
NSN: 4820-01-322-7580
FSC: 4820
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM81940/1-2
NSN4820-01-322-7580
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: M81940/1-2 · 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
•
THREAD CLASS: 3A ALL ENDS A
•
NOMINAL THREAD SIZE: 0.250 INCHES ALL ENDS IN
•
FLOW CONTROL DEVICE: POPPET
•
NONDEFINITIVE SPEC/STD DATA: -81940/1-2 NUMBER
•
CONNECTION STYLE: FLARELESS (TUBE) ALL ENDS
•
OPERATING PRESSURE: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
SEAT ANGLE: 24.0 DEGREES ALL ENDS
•
THREAD SERIES DESIGNATOR: UNF ALL ENDS
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3A ALL ENDS A
NOMINAL THREAD SIZE0.250 INCHES ALL ENDS IN
FLOW CONTROL DEVICEPOPPET
NONDEFINITIVE SPEC/STD DATA-81940/1-2 NUMBER
CONNECTION STYLEFLARELESS (TUBE) ALL ENDS
OPERATING PRESSURE3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
SEAT ANGLE24.0 DEGREES ALL ENDS
THREAD SERIES DESIGNATORUNF ALL ENDS
FURNISHED ITEMS AND QUANTITY1 CHAIN AND 1 CAP
VALVE OPERATION METHODMANUAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
P14-500 1-4INInterchangeable
interchangeable cross-reference
interchangeable
P14-500Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-81940/1Interchangeable
interchangeable cross-reference
interchangeable
MIL-V-81940/1BInterchangeable
interchangeable cross-reference
interchangeable
P15-500Interchangeable
interchangeable cross-reference
interchangeable
FD15-1000-04Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M81940/1-2?
M81940/1-2 is a M81940/1-2.
What parts can replace M81940/1-2?
There are 12 known substitutes for M81940/1-2: P14-500 1-4IN, P14-500, MIL-DTL-81940/1 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M81940/1-2?
M81940/1-2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-322-7580. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026