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9540K59 — BUMPER

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

9540K59: BUMPER.

The BUMPER is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC, hole_diameter: 0.1875 INCHES NOMINAL IN, overall_height: 0.3437 INCHES NOMINAL IN, style_designator: PAN TOP COUNTERBORED, first_counterbore_depth: 0.1875 INCHES NOMINAL IN, material_hardness_rating: 75.0 DUROMETER NOMINAL. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-451-0067, 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
9540K59
NSN: 5340-01-451-0067
FSC: 5340 — Hardware, Commercial
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC
hole_diameter0.1875 INCHES NOMINAL IN
overall_height0.3437 INCHES NOMINAL IN
style_designatorPAN TOP COUNTERBORED
first_counterbore_depth0.1875 INCHES NOMINAL IN
material_hardness_rating75.0 DUROMETER NOMINAL
first_counterbore_diameter0.3750 INCHES NOMINAL IN
outside/top_flange_diameter0.9687 INCHES NOMINAL IN
NSN5340-01-451-0067
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 9540K59 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
•
OUTSIDE/TOP FLANGE DIAMETER: 0.9687 INCHES NOMINAL IN
•
MATERIAL HARDNESS RATING: 75.0 DUROMETER NOMINAL
•
FIRST COUNTERBORE DIAMETER: 0.3750 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PAN TOP COUNTERBORED
•
FIRST COUNTERBORE DEPTH: 0.1875 INCHES NOMINAL IN
•
MATERIAL: RUBBER SYNTHETIC
•
HOLE DIAMETER: 0.1875 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.3437 INCHES NOMINAL IN
OUTSIDE/TOP FLANGE DIAMETER0.9687 INCHES NOMINAL IN
MATERIAL HARDNESS RATING75.0 DUROMETER NOMINAL
FIRST COUNTERBORE DIAMETER0.3750 INCHES NOMINAL IN
STYLE DESIGNATORPAN TOP COUNTERBORED
FIRST COUNTERBORE DEPTH0.1875 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC
HOLE DIAMETER0.1875 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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 9540K59?
9540K59 is a BUMPER.
What is the NSN for 9540K59?
9540K59 is cataloged in the U.S. Government catalog under NSN 5340-01-451-0067. 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.