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251718 — GASKET

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

251718: GASKET.

The GASKET is a the manufacturer industrial component. Key specifications include material: PAPER AND RUBBER SYNTHETIC OVERALL, hole_diameter: 0.310 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 3.000 INCHES NOMINAL IN, overall_length: 3.000 INCHES NOMINAL IN, style_designator: NON-CIRCULAR, aperture_diameter: 2.530 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-008-9226, 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
251718
NSN: 5330-00-008-9226
NIINs: 000089226, 012322174
FSC: 5330 — Packing and Gasket Materials
CAGE: 92878 — HDT EXPEDITIONARY SYSTEMS INC (USA)
SPECIFICATIONS
materialPAPER AND RUBBER SYNTHETIC OVERALL
hole_diameter0.310 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width3.000 INCHES NOMINAL IN
overall_length3.000 INCHES NOMINAL IN
style_designatorNON-CIRCULAR
aperture_diameter2.530 INCHES NOMINAL IN
bolt_hole_quantity4
cross-sectional_thickness0.014 INCHES MINIMUM AND 0.018 INCHES MAXIMUM IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
material_document_and_classificationHH-P-96,CL A FED SPEC ALL MATERIAL RESPONSES OVERALL
outside_edge_to_bolt_hole_center_distance_along_width0.375 INCHES NOMINAL IN
outside_edge_to_bolt_hole_center_distance_along_length0.375 INCHES NOMINAL IN
NSN5330-00-008-9226
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 251718 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: 0.014 INCHES MINIMUM AND 0.018 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: NON-CIRCULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: HH-P-96,CL A FED SPEC ALL MATERIAL RESPONSES OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
APERTURE DIAMETER: 2.530 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 4
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.014 INCHES MINIMUM AND 0.018 INCHES MAXIMUM IN
STYLE DESIGNATORNON-CIRCULAR
MATERIAL DOCUMENT AND CLASSIFICATIONHH-P-96,CL A FED SPEC ALL MATERIAL RESPONSES OVERALL
OVERALL LENGTH3.000 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OVERALL WIDTH3.000 INCHES NOMINAL IN
APERTURE DIAMETER2.530 INCHES NOMINAL IN
BOLT HOLE QUANTITY4
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG LENGTH2.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG WIDTH2.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 251718?
251718 is a GASKET.
What is the NSN for 251718?
251718 is cataloged in the U.S. Government catalog under NSN 5330-00-008-9226. 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.