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PartsTable / COMPONENT / 21537004-1 ITEM 15
21537004-1 ITEM 15 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The SEAL,PLAIN is a the manufacturer industrial component. Key specifications include material: RUBBER NEOPRENE SEALING ELEMENT, special_features: NEOPRENE BASE, 5/16" X 3/4", end_item_identification: DAMPER MODEL VC413M, part_name_assigned_by_controlling_agency: EPT WEDGE DAMPER SEAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-551-6351, 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
21537004-1 ITEM 15
NSN: 5330-01-551-6351
FSC: 5330
CAGE: 52249 — MESTEK, INC. DBA AMERICAN WARMING & VENTILATING DIVISION DIV AMERICAN WARMING AND VENTILATING (USA)
SPECIFICATIONS
materialRUBBER NEOPRENE SEALING ELEMENT
special_featuresNEOPRENE BASE, 5/16" X 3/4"
end_item_identificationDAMPER MODEL VC413M
part_name_assigned_by_controlling_agencyEPT WEDGE DAMPER SEAL
NSN5330-01-551-6351
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 21537004-1 ITEM 15 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL: RUBBER NEOPRENE SEALING ELEMENT
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONDAMPER MODEL VC413M
PART NAME ASSIGNED BY CONTROLLING AGENCYEPT WEDGE DAMPER SEAL
MATERIALRUBBER NEOPRENE SEALING ELEMENT
SPECIAL FEATURESNEOPRENE BASE, 5/16" X 3/4"
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
7412-00Interchangeable
Gage,depth and Pressure Diver's
interchangeable
3120-00Interchangeable
Gage,depth and Pressure Diver's
interchangeable
3125-00Interchangeable
Gage,depth and Pressure Diver's
interchangeable
21537004-2 ITEM 15Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21537004-1 ITEM 15?
21537004-1 ITEM 15 is a SEAL,PLAIN.
What parts can replace 21537004-1 ITEM 15?
There are 4 known substitutes for 21537004-1 ITEM 15: 7412-00, 3120-00, 3125-00 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21537004-1 ITEM 15?
21537004-1 ITEM 15 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-551-6351. 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