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PartsTable / COMPONENT / 749957-101
749957-101 ✓ 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 VALVE,CHECK is a the manufacturer industrial component. Key specifications include material: PLASTIC CATHETER, tip_type: WHISTLE, base_type: STANDARD BASE, bore_type: STRAIGHT, coil_type: NOT ISOLATED, reed_type: DUAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-281-4709, 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
749957-101
NSN: 4820-00-281-4709
FSC: 4820
CAGE: 98897 — LOCKHEED MARTIN CORP (USA)
SPECIFICATIONS
materialPLASTIC CATHETER
tip_typeWHISTLE
base_typeSTANDARD BASE
bore_typeSTRAIGHT
coil_typeNOT ISOLATED
reed_typeDUAL
thickness0.048 INCHES NOMINAL IN
unit_typeELECTROMECHANICAL
port_styleINVERTED FLARE LOCATION NOT OTHERWISE SPECIFIED
groove_width0.125 INCHES NOMINAL IN
bore_diameter1.250 INCHES NOMINAL IN
grommet_styleROUND
NSN4820-00-281-4709
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 749957-101 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
3767121Interchangeable
interchangeable cross-reference
interchangeable
3074Interchangeable
interchangeable cross-reference
interchangeable
300019Interchangeable
interchangeable cross-reference
interchangeable
9139674Interchangeable
interchangeable cross-reference
interchangeable
2R53P19Interchangeable
interchangeable cross-reference
interchangeable
B2R53P19Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 749957-101?
749957-101 is a VALVE,CHECK.
What parts can replace 749957-101?
There are 14 known substitutes for 749957-101: 3767121, 3074, 300019 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 749957-101?
749957-101 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-281-4709. 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