PartsTable
Technical Data Sheet
Download PDF

D18973 — CUP,COMPRESSION

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

D18973: CUP,COMPRESSION.

The CUP,COMPRESSION is a the manufacturer industrial component. Key specifications include material: LEATHER CATTLEHIDE OVERALL, overall_length: 0.250 INCHES NOMINAL IN, feather_edge_angle: 45.0 DEGREES NOMINAL, center_hole_diameter: 1.125 INCHES NOMINAL IN, recess_inside_diameter: 1.625 INCHES NOMINAL IN, base_material_thickness: 0.063 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-376-8899, 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
D18973
NSN: 5340-00-376-8899
FSC: 5340 — Hardware, Commercial
CAGE: 11859 — HUNT VALVE COMPANY, INC. (USA)
SPECIFICATIONS
materialLEATHER CATTLEHIDE OVERALL
overall_length0.250 INCHES NOMINAL IN
feather_edge_angle45.0 DEGREES NOMINAL
center_hole_diameter1.125 INCHES NOMINAL IN
recess_inside_diameter1.625 INCHES NOMINAL IN
base_material_thickness0.063 INCHES NOMINAL IN
material_document_and_classificationKK-L-181,GRADE A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5340-00-376-8899
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: D18973 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: 1.125 INCHES NOMINAL IN
•
BASE MATERIAL THICKNESS: 0.063 INCHES NOMINAL IN
•
MATERIAL: LEATHER CATTLEHIDE OVERALL
•
RECESS INSIDE DIAMETER: 1.625 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 LENGTH0.250 INCHES NOMINAL IN
CENTER HOLE DIAMETER1.125 INCHES NOMINAL IN
BASE MATERIAL THICKNESS0.063 INCHES NOMINAL IN
MATERIALLEATHER CATTLEHIDE OVERALL
RECESS INSIDE DIAMETER1.625 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
Ready to buy D18973?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is D18973?
D18973 is a CUP,COMPRESSION.
What is the NSN for D18973?
D18973 is cataloged in the U.S. Government catalog under NSN 5340-00-376-8899. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — D18973

✓ 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.