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9546K21 — BUMPER

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

9546K21: BUMPER.

The BUMPER is a the manufacturer industrial component. Key specifications include material: STEEL, thread_size: 3/8-16, shank_length: 1.250 INCHES NOMINAL IN, overall_height: 2.500 INCHES NOMINAL IN, style_designator: FLAT RECESSED TOP THREADED STUD, outside/top_flange_diameter: 1.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-481-1740, 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
9546K21
NSN: 5340-01-481-1740
FSC: 5340 — Hardware, Commercial
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL
thread_size3/8-16
shank_length1.250 INCHES NOMINAL IN
overall_height2.500 INCHES NOMINAL IN
style_designatorFLAT RECESSED TOP THREADED STUD
outside/top_flange_diameter1.250 INCHES NOMINAL IN
NSN5340-01-481-1740
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 9546K21 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: 1.250 INCHES NOMINAL IN
•
SHANK LENGTH: 1.250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: FLAT RECESSED TOP THREADED STUD
•
THREAD SIZE: 3/8-16
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT2.500 INCHES NOMINAL IN
OUTSIDE/TOP FLANGE DIAMETER1.250 INCHES NOMINAL IN
SHANK LENGTH1.250 INCHES NOMINAL IN
STYLE DESIGNATORFLAT RECESSED TOP THREADED STUD
THREAD SIZE3/8-16
MATERIALSTEEL
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 9546K21?
9546K21 is a BUMPER.
What is the NSN for 9546K21?
9546K21 is cataloged in the U.S. Government catalog under NSN 5340-01-481-1740. 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.