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Technical Data Sheet
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9309K21 — BUMPER

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

9309K21: BUMPER.

The BUMPER is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-STYRENE CLASS SBR, overall_width: 0.5 INCHES NOMINAL IN, shank_diameter: 4.76 MILLIMETERS NOMINAL MM, groove_diameter: 4.76 MILLIMETERS NOMINAL MM, style_designator: DOUBLE FLANGE, bottom_flange_width: 0.25 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-682-9116, 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
9309K21
NSN: 5340-01-682-9116
FSC: 5340 — Hardware, Commercial
CAGE: 2V507 — MCMASTER-CARR SUPPLY COMPANY (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-STYRENE CLASS SBR
overall_width0.5 INCHES NOMINAL IN
shank_diameter4.76 MILLIMETERS NOMINAL MM
groove_diameter4.76 MILLIMETERS NOMINAL MM
style_designatorDOUBLE FLANGE
bottom_flange_width0.25 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencyPUSH-IN BUMPERS WITH TIGHT-GRIP STEM
NSN5340-01-682-9116
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 9309K21 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
•
SHANK DIAMETER: 4.76 MILLIMETERS NOMINAL MM
•
GROOVE DIAMETER: 4.76 MILLIMETERS NOMINAL MM
•
STYLE DESIGNATOR: DOUBLE FLANGE
•
BOTTOM FLANGE WIDTH: 0.25 INCHES NOMINAL IN
•
COLOR: BLACK
•
MATERIAL: RUBBER BUTADIENE-STYRENE CLASS SBR
TECHNICAL CHARACTERISTICS
SHANK DIAMETER4.76 MILLIMETERS NOMINAL MM
GROOVE DIAMETER4.76 MILLIMETERS NOMINAL MM
STYLE DESIGNATORDOUBLE FLANGE
OVERALL WIDTH0.5 INCHES NOMINAL IN
BOTTOM FLANGE WIDTH0.25 INCHES NOMINAL IN
COLORBLACK
PART NAME ASSIGNED BY CONTROLLING AGENCYPUSH-IN BUMPERS WITH TIGHT-GRIP STEM
MATERIALRUBBER BUTADIENE-STYRENE CLASS SBR
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 9309K21?
9309K21 is a BUMPER.
What is the NSN for 9309K21?
9309K21 is cataloged in the U.S. Government catalog under NSN 5340-01-682-9116. 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.