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Technical Data Sheet
PartsTable / COMPONENT / 21270-12
21270-12 ✓ 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 REGULATING ELEMENT,FLOW,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL, special_features: STEEL IS IAW MIL-S-18729 4130 COND. N, end_item_identification: NHA 4820-01-503-2497 RESTRICTOR VALVE ASSY; W/S SEAWOLF CLASS SSN, part_name_assigned_by_controlling_agency: QUIET ELEMENT.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-503-6862, 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
21270-12
NSN: 4820-01-503-6862
FSC: 4820
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL
special_featuresSTEEL IS IAW MIL-S-18729 4130 COND. N
end_item_identificationNHA 4820-01-503-2497 RESTRICTOR VALVE ASSY; W/S SEAWOLF CLASS SSN
part_name_assigned_by_controlling_agencyQUIET ELEMENT
NSN4820-01-503-6862
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 21270-12 · 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
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL
SPECIAL FEATURESSTEEL IS IAW MIL-S-18729 4130 COND. N
END ITEM IDENTIFICATIONNHA 4820-01-503-2497 RESTRICTOR VALVE ASSY; W/S SEAWOLF CLASS SSN
PART NAME ASSIGNED BY CONTROLLING AGENCYQUIET ELEMENT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
389.05096Interchangeable
interchangeable cross-reference
interchangeable
SCC 105 391Interchangeable
interchangeable cross-reference
interchangeable
11055Interchangeable
interchangeable cross-reference
interchangeable
21270Interchangeable
interchangeable cross-reference
interchangeable
10440MRInterchangeable
interchangeable cross-reference
interchangeable
5082-2240-00Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21270-12?
21270-12 is a REGULATING ELEMENT,FLOW,VALVE.
What parts can replace 21270-12?
There are 20 known substitutes for 21270-12: 389.05096, SCC 105 391, 11055 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21270-12?
21270-12 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-503-6862. 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