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4W21123-105A — SEAL,NONMETALLIC SPECIAL SHAPED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

4W21123-105A: SEAL,NONMETALLIC SPECIAL SHAPED.

SEAL,NONMETALLIC SPECIAL SHAPED. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL, construction: SOLIDSOLID, aperture_width: 12.900 INCHES NOMINAL12.900 INCHES NOMINAL IN, aperture_length: 21.900 INCHES NOMINAL21.900 INCHES NOMINAL IN, style_designator: OVAL, attachment_method: ROUND HOLEROUND HOLE. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-274-0284, 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
4W21123-105A
NSN: 5330-01-274-0284
FSC: 5330 — Packing and Gasket Materials
CAGE: 93211 — TRIUMPH AEROSTRUCTURES, LLC DBA TRIUMPH AEROSTRUCTURES - VOUGHT INTEGRATED PROGRAMS DIVISION (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
constructionSOLIDSOLID
aperture_width12.900 INCHES NOMINAL12.900 INCHES NOMINAL IN
aperture_length21.900 INCHES NOMINAL21.900 INCHES NOMINAL IN
special_featuresREINFORCED WITH .016 THICK NYLON WOVEN FABRIC; 7 RIBS LOCATED ON RAISEDRUBBER PORTION OF SEALREINFORCED WITH .016 THICK NYLON WOVEN FABRIC; 7 RIBS LOCATED ON RAISEDRUBBER PORTION OF SEAL
style_designatorOVAL
attachment_methodROUND HOLEROUND HOLE
cross-sectional_width1.150 INCHES NOMINAL1.150 INCHES NOMINAL IN
cross-sectional_height0.130 INCHES NOMINAL0.130 INCHES NOMINAL IN
attachment_hole_diameter0.301 INCHES MINIMUM AND 0.301 INCHES MINIMUM AND 0.328 INCHES MAXIMUM0.328 INCHES MAXIMUM IN
cross-sectional_thickness0.050 INCHES NOMINAL0.050 INCHES NOMINAL IN
attachment_feature_quantity4747
NSN5330-01-274-0284
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 4W21123-105A 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 HOLE DIAMETER: 0.301 INCHES MINIMUM AND 0.301 INCHES MINIMUM AND 0.328 INCHES MAXIMUM0.328 INCHES MAXIMUM IN
•
ATTACHMENT FEATURE QUANTITY: 4747
•
CROSS-SECTIONAL THICKNESS: 0.050 INCHES NOMINAL0.050 INCHES NOMINAL IN
•
CROSS-SECTIONAL HEIGHT: 0.130 INCHES NOMINAL0.130 INCHES NOMINAL IN
•
CROSS-SECTIONAL WIDTH: 1.150 INCHES NOMINAL1.150 INCHES NOMINAL IN
•
STYLE DESIGNATOR: OVAL
•
CROSS-SECTIONAL SHAPE STYLE: SPECIALSPECIAL
•
APERTURE WIDTH: 12.900 INCHES NOMINAL12.900 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
ATTACHMENT HOLE DIAMETER0.301 INCHES MINIMUM AND 0.301 INCHES MINIMUM AND 0.328 INCHES MAXIMUM0.328 INCHES MAXIMUM IN
ATTACHMENT FEATURE QUANTITY4747
CROSS-SECTIONAL THICKNESS0.050 INCHES NOMINAL0.050 INCHES NOMINAL IN
CROSS-SECTIONAL HEIGHT0.130 INCHES NOMINAL0.130 INCHES NOMINAL IN
CROSS-SECTIONAL WIDTH1.150 INCHES NOMINAL1.150 INCHES NOMINAL IN
STYLE DESIGNATOROVAL
CROSS-SECTIONAL SHAPE STYLESPECIALSPECIAL
APERTURE WIDTH12.900 INCHES NOMINAL12.900 INCHES NOMINAL IN
APERTURE LENGTH21.900 INCHES NOMINAL21.900 INCHES NOMINAL IN
SPECIAL FEATURESREINFORCED WITH .016 THICK NYLON WOVEN FABRIC; 7 RIBS LOCATED ON RAISEDRUBBER PORTION OF SEALREINFORCED WITH .016 THICK NYLON WOVEN FABRIC; 7 RIBS LOCATED ON RAISEDRUBBER PORTION OF SEAL
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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4W21123-105A?
4W21123-105A is a SEAL,NONMETALLIC SPECIAL SHAPED.
What is the NSN for 4W21123-105A?
4W21123-105A is cataloged in the U.S. Government catalog under NSN 5330-01-274-0284. 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.