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1120A21 — SEAL,NONMETALLIC SPECIAL SHAPED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

1120A21: SEAL,NONMETALLIC SPECIAL SHAPED.

SEAL,NONMETALLIC SPECIAL SHAPED. Key specifications include material: RUBBER ETHYLENE-PROPYLENE-DIENE CLASS EPDM SEALING ELEMENT, construction: ONE-PIECE, style_designator: CIRCULAR, attachment_method: SLOT, cross-sectional_width: 0.641 INCHES NOMINAL IN, cross-sectional_height: 0.438 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-560-7477, 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
1120A21
NSN: 5330-01-560-7477
FSC: 5330 — Packing and Gasket Materials
CAGE: 2V507 — MCMASTER-CARR SUPPLY COMPANY (USA)
SPECIFICATIONS
materialRUBBER ETHYLENE-PROPYLENE-DIENE CLASS EPDM SEALING ELEMENT
constructionONE-PIECE
style_designatorCIRCULAR
attachment_methodSLOT
cross-sectional_width0.641 INCHES NOMINAL IN
cross-sectional_height0.438 INCHES NOMINAL IN
end_item_identification7386082 (53711) FES NOSE ASSEMBLY
attachment_feature_width0.031 INCHES NOMINAL IN
attachment_feature_quantity1
cross-sectional_shape_styleU SHAPE
part_name_assigned_by_controlling_agencyINAVY: PROTECTIVE TRIM; CAGE: EDGE-GRIP RUBBER SEAL, EPDM WITH VINYL GRIP
NSN5330-01-560-7477
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1120A21 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
•
ATTACHMENT FEATURE QUANTITY: 1
•
CROSS-SECTIONAL HEIGHT: 0.438 INCHES NOMINAL IN
•
CROSS-SECTIONAL WIDTH: 0.641 INCHES NOMINAL IN
•
ATTACHMENT FEATURE WIDTH: 0.031 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CIRCULAR
•
CROSS-SECTIONAL SHAPE STYLE: U SHAPE
•
COLOR: BLACK
TECHNICAL CHARACTERISTICS
ATTACHMENT FEATURE QUANTITY1
CROSS-SECTIONAL HEIGHT0.438 INCHES NOMINAL IN
CROSS-SECTIONAL WIDTH0.641 INCHES NOMINAL IN
ATTACHMENT FEATURE WIDTH0.031 INCHES NOMINAL IN
STYLE DESIGNATORCIRCULAR
CROSS-SECTIONAL SHAPE STYLEU SHAPE
COLORBLACK
SPECIAL FEATURESCONSISTS OF EPDM ROUND SEAL, 0.438 INCH OD, ATTACHED TO ONE LEG OF VINYL U-SHAPED GRIPPING PORTION, 0.203 IN. WIDE BY 0.375 IN. HIGH THAT FITS AN EDGE 0.031 IN. WIDE; GRIPPING PORTION HAS INDIVIDUAL ALUMINUM CLIPS INSIDE, FOR A PERMANENT, SECURE GRIP IN
PART NAME ASSIGNED BY CONTROLLING AGENCYINAVY: PROTECTIVE TRIM; CAGE: EDGE-GRIP RUBBER SEAL, EPDM WITH VINYL GRIP
END ITEM IDENTIFICATION7386082 (53711) FES NOSE ASSEMBLY
OTHER ITEMS IN FSC 5330 — Packing and Gasket Materials
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5330-00-000-0085 5330-00-000-0167 5330-00-000-5275 5330-00-001-1260 5330-00-001-1833 5330-00-001-1844 5330-00-001-1845 5330-00-001-1846
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1120A21?
1120A21 is a SEAL,NONMETALLIC SPECIAL SHAPED.
What is the NSN for 1120A21?
1120A21 is cataloged in the U.S. Government catalog under NSN 5330-01-560-7477. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.