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PartsTable / COMPONENT / 21270-1003-1
21270-1003-1 ✓ 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 COMP 410 OVERALL, end_item_identification: NHA 4820-01-503-2497 RESTRICTOR MANIFOLD VALVE ASSY; SEAWOLF CLASS SSN, material_document_and_classification: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE BODY. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-503-2618, 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
21270-1003-1
NSN: 4820-01-503-2618
FSC: 4820
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL COMP 410 OVERALL
end_item_identificationNHA 4820-01-503-2497 RESTRICTOR MANIFOLD VALVE ASSY; SEAWOLF CLASS SSN
material_document_and_classificationQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE BODY
NSN4820-01-503-2618
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 21270-1003-1 · 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 COMP 410 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE BODY
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 410 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE BODY
END ITEM IDENTIFICATIONNHA 4820-01-503-2497 RESTRICTOR MANIFOLD VALVE ASSY; SEAWOLF CLASS SSN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
389.05096Interchangeable
interchangeable cross-reference
interchangeable
SCC 105 391Interchangeable
interchangeable cross-reference
interchangeable
11055Interchangeable
interchangeable cross-reference
interchangeable
212705Interchangeable
interchangeable cross-reference
interchangeable
21270Interchangeable
interchangeable cross-reference
interchangeable
10440MRInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21270-1003-1?
21270-1003-1 is a SEAT,VALVE.
What parts can replace 21270-1003-1?
There are 17 known substitutes for 21270-1003-1: 389.05096, SCC 105 391, 11055 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21270-1003-1?
21270-1003-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-503-2618. 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