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21-642-16 — GASKET

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

21-642-16: GASKET.

The GASKET is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC OVERALL, hole_diameter: 0.172 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 1.281 INCHES NOMINAL IN, overall_length: 1.281 INCHES NOMINAL IN, style_designator: NON-CIRCULAR, aperture_diameter: 1.000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-292-3958, 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
21-642-16
NSN: 5330-00-292-3958
FSC: 5330 — Packing and Gasket Materials
CAGE: 99167 — HAMILTON SUNDSTRAND CORPORATION (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
hole_diameter0.172 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width1.281 INCHES NOMINAL IN
overall_length1.281 INCHES NOMINAL IN
style_designatorNON-CIRCULAR
aperture_diameter1.000 INCHES NOMINAL IN
bolt_hole_quantity4
outside_corner_radius0.156 INCHES NOMINAL IN
cross-sectional_thickness0.031 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
outside_edge_to_bolt_hole_center_distance_along_width0.156 INCHES NOMINAL IN
outside_edge_to_bolt_hole_center_distance_along_length0.156 INCHES NOMINAL IN
NSN5330-00-292-3958
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 21-642-16 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 THICKNESS: 0.031 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NON-CIRCULAR
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
APERTURE DIAMETER: 1.000 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 4
•
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG LENGTH: 0.969 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.031 INCHES NOMINAL IN
STYLE DESIGNATORNON-CIRCULAR
OVERALL LENGTH1.281 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OVERALL WIDTH1.281 INCHES NOMINAL IN
APERTURE DIAMETER1.000 INCHES NOMINAL IN
BOLT HOLE QUANTITY4
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG LENGTH0.969 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG WIDTH0.969 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
OUTSIDE EDGE TO BOLT HOLE CENTER DISTANCE ALONG LENGTH0.156 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 9
8526178Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
546775Reference document
Same NSN cross-reference
Reference document — Secondary reference
C4524-6699-2Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
EL16-003-213Reference document
Same NSN cross-reference
Reference document — Secondary reference
GKT487Reference document
Same NSN cross-reference
Reference document — Secondary reference
G230955-9Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 21-642-16?
21-642-16 is a GASKET.
What parts can replace 21-642-16?
There are 9 known substitutes for 21-642-16: 8526178, 546775, C4524-6699-2 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21-642-16?
21-642-16 is cataloged in the U.S. Government catalog under NSN 5330-00-292-3958. 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.