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Technical Data Sheet
PartsTable / COMPONENT / A-21099
A-21099 ✓ 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 GASKET is a the manufacturer industrial component. Key specifications include material: ASBESTOS AND RUBBER SYNTHETIC OVERALL, hole_diameter: 0.344 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 2.875 INCHES NOMINAL IN, overall_length: 2.875 INCHES NOMINAL IN, style_designator: NON-CIRCULAR, aperture_diameter: 1.812 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-448-6694, 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
A-21099
NSN: 5330-00-448-6694
FSC: 5330
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialASBESTOS AND RUBBER SYNTHETIC OVERALL
hole_diameter0.344 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width2.875 INCHES NOMINAL IN
overall_length2.875 INCHES NOMINAL IN
style_designatorNON-CIRCULAR
aperture_diameter1.812 INCHES NOMINAL IN
bolt_hole_quantity4
outside_corner_radius0.438 INCHES NOMINAL IN
cross-sectional_thickness0.031 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
material_document_and_classificationAMS 3232 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
outside_edge_to_bolt_hole_center_distance_along_width0.438 INCHES NOMINAL IN
NSN5330-00-448-6694
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A-21099 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
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
OUTSIDE EDGE TO BOLT HOLE CENTER DISTANCE ALONG LENGTH: 0.438 INCHES NOMINAL IN
•
OUTSIDE EDGE TO BOLT HOLE CENTER DISTANCE ALONG WIDTH: 0.438 INCHES NOMINAL IN
•
APERTURE DIAMETER: 1.812 INCHES NOMINAL IN
•
OUTSIDE CORNER RADIUS: 0.438 INCHES NOMINAL IN
•
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG WIDTH: 2.000 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
HOLE DIAMETER: 0.344 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL WIDTH2.875 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OUTSIDE EDGE TO BOLT HOLE CENTER DISTANCE ALONG LENGTH0.438 INCHES NOMINAL IN
OUTSIDE EDGE TO BOLT HOLE CENTER DISTANCE ALONG WIDTH0.438 INCHES NOMINAL IN
APERTURE DIAMETER1.812 INCHES NOMINAL IN
OUTSIDE CORNER RADIUS0.438 INCHES NOMINAL IN
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG WIDTH2.000 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
HOLE DIAMETER0.344 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
BOLT HOLE QUANTITY4
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG LENGTH2.000 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
21099Interchangeable
interchangeable cross-reference
interchangeable
19268Interchangeable
interchangeable cross-reference
interchangeable
95-0386Interchangeable
interchangeable cross-reference
interchangeable
21099-1Interchangeable
interchangeable cross-reference
interchangeable
2100-0068Interchangeable
interchangeable cross-reference
interchangeable
2BW58Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A-21099?
A-21099 is a GASKET.
What parts can replace A-21099?
There are 6 known substitutes for A-21099: 21099, 19268, 95-0386 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A-21099?
A-21099 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-448-6694. 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