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D25656 — CUP,COMPRESSION

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

D25656: CUP,COMPRESSION.

The CUP,COMPRESSION is a the manufacturer industrial component. Key specifications include material: LEATHER CATTLEHIDE OVERALL, overall_length: 0.313 INCHES NOMINAL IN, feather_edge_angle: 45.0 DEGREES NOMINAL, center_hole_diameter: 2.875 INCHES NOMINAL IN, recess_inside_diameter: 2.563 INCHES NOMINAL IN, base_material_thickness: 0.094 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-376-8902, 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
D25656
NSN: 5340-00-376-8902
FSC: 5340 — Hardware, Commercial
CAGE: 11859 — HUNT VALVE COMPANY, INC. (USA)
SPECIFICATIONS
materialLEATHER CATTLEHIDE OVERALL
overall_length0.313 INCHES NOMINAL IN
feather_edge_angle45.0 DEGREES NOMINAL
center_hole_diameter2.875 INCHES NOMINAL IN
recess_inside_diameter2.563 INCHES NOMINAL IN
base_material_thickness0.094 INCHES NOMINAL IN
material_document_and_classificationKK-L-181,GRADE A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5340-00-376-8902
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: D25656 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
•
FEATHER EDGE ANGLE: 45.0 DEGREES NOMINAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: KK-L-181,GRADE A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CENTER HOLE DIAMETER: 2.875 INCHES NOMINAL IN
•
BASE MATERIAL THICKNESS: 0.094 INCHES NOMINAL IN
•
MATERIAL: LEATHER CATTLEHIDE OVERALL
•
RECESS INSIDE DIAMETER: 2.563 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FEATHER EDGE ANGLE45.0 DEGREES NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATIONKK-L-181,GRADE A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH0.313 INCHES NOMINAL IN
CENTER HOLE DIAMETER2.875 INCHES NOMINAL IN
BASE MATERIAL THICKNESS0.094 INCHES NOMINAL IN
MATERIALLEATHER CATTLEHIDE OVERALL
RECESS INSIDE DIAMETER2.563 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is D25656?
D25656 is a CUP,COMPRESSION.
What is the NSN for D25656?
D25656 is cataloged in the U.S. Government catalog under NSN 5340-00-376-8902. 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.