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2121863 — RETAINER,PACKING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

2121863: RETAINER,PACKING.

The RETAINER,PACKING is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, surface_treatment: ANODIZE OVERALL, peripheral_diameter: 4.500 INCHES NOMINAL IN, center_hole_diameter: 2.873 INCHES MINIMUM AND 2.875 INCHES MAXIMUM IN, cross-sectional_height: 0.781 INCHES NOMINAL IN, attachment_feature_circle_diameter: 4.000 INCHES NOMINAL SINGLE CIRCLE IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-317-9637, 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
2121863
NSN: 5330-01-317-9637
FSC: 5330 — Packing and Gasket Materials
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
special_featuresTWO BOLT HOLES WITH 0.250-20UNC-3B THRU COUNTERSUNK 90 DEGREES PLUS OR MINUS 10 DEGREES BY 0.28 INCHES PLUS OR MINUS 0.01 INCHES DIAMETER IN
surface_treatmentANODIZE OVERALL
peripheral_diameter4.500 INCHES NOMINAL IN
center_hole_diameter2.873 INCHES MINIMUM AND 2.875 INCHES MAXIMUM IN
cross-sectional_height0.781 INCHES NOMINAL IN
attachment_feature_circle_diameter4.000 INCHES NOMINAL SINGLE CIRCLE IN
material_document_and_classificationAA2024-T4,T351 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-A-8625 MIL SPEC 1ST TREATMENT RESPONSE OVERALL
NSN5330-01-317-9637
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2121863 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625 MIL SPEC 1ST TREATMENT RESPONSE OVERALL
•
CROSS-SECTIONAL HEIGHT: 0.781 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AA2024-T4,T351 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
ATTACHMENT FEATURE CIRCLE DIAMETER: 4.000 INCHES NOMINAL SINGLE CIRCLE IN
•
PERIPHERAL DIAMETER: 4.500 INCHES NOMINAL IN
•
SURFACE TREATMENT: ANODIZE OVERALL
•
CENTER HOLE DIAMETER: 2.873 INCHES MINIMUM AND 2.875 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 MIL SPEC 1ST TREATMENT RESPONSE OVERALL
CROSS-SECTIONAL HEIGHT0.781 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAA2024-T4,T351 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
ATTACHMENT FEATURE CIRCLE DIAMETER4.000 INCHES NOMINAL SINGLE CIRCLE IN
PERIPHERAL DIAMETER4.500 INCHES NOMINAL IN
SPECIAL FEATURESTWO BOLT HOLES WITH 0.250-20UNC-3B THRU COUNTERSUNK 90 DEGREES PLUS OR MINUS 10 DEGREES BY 0.28 INCHES PLUS OR MINUS 0.01 INCHES DIAMETER IN
SURFACE TREATMENTANODIZE OVERALL
CENTER HOLE DIAMETER2.873 INCHES MINIMUM AND 2.875 INCHES MAXIMUM IN
MATERIALALUMINUM ALLOY 2024 OVERALL
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 2121863?
2121863 is a RETAINER,PACKING.
What is the NSN for 2121863?
2121863 is cataloged in the U.S. Government catalog under NSN 5330-01-317-9637. This indicates validated use in U.S. government and defense supply chains.
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