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PartsTable / COMPONENT / 40044 PC 21
40044 PC 21 ✓ 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 SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, material_document_and_classification: QQ-S-763/303 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-274-1859, 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
40044 PC 21
NSN: 4820-01-274-1859
FSC: 4820
CAGE: 55378 — TRAC REGULATOR CO., INC. DBA TRAC REGULATOR CO INC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
material_document_and_classificationQQ-S-763/303 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN4820-01-274-1859
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 40044 PC 21 · 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
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763/303 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL CORROSION RESISTING OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763/303 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
2N398BInterchangeable
interchangeable cross-reference
interchangeable
MS35307-465Interchangeable
interchangeable cross-reference
interchangeable
36400Interchangeable
interchangeable cross-reference
interchangeable
5082-8680Interchangeable
interchangeable cross-reference
interchangeable
MA47511Interchangeable
interchangeable cross-reference
interchangeable
353-3623-020Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 40044 PC 21?
40044 PC 21 is a SEAT,VALVE.
What parts can replace 40044 PC 21?
There are 18 known substitutes for 40044 PC 21: 2N398B, MS35307-465, 36400 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 40044 PC 21?
40044 PC 21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-274-1859. 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