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12421720 — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

12421720: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: RUBBER, overall_height: 1.50 INCHES MINIMUM AND 1.84 INCHES MAXIMUM IN, end_item_identification: 2320-01-447-3889, material_document_and_classification: ASTM SB6208 ASSN STD SINGLE MATERIAL RESPONSE, part_name_assigned_by_controlling_agency: BOOT, DUST AND MOISTURE SEAL. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-658-9178, 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
12421720
NSN: 5340-01-658-9178
FSC: 5340 — Hardware, Commercial
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialRUBBER
overall_height1.50 INCHES MINIMUM AND 1.84 INCHES MAXIMUM IN
end_item_identification2320-01-447-3889
material_document_and_classificationASTM SB6208 ASSN STD SINGLE MATERIAL RESPONSE
part_name_assigned_by_controlling_agencyBOOT, DUST AND MOISTURE SEAL
NSN5340-01-658-9178
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 12421720 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM SB6208 ASSN STD SINGLE MATERIAL RESPONSE
•
MATERIAL: RUBBER
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.50 INCHES MINIMUM AND 1.84 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM SB6208 ASSN STD SINGLE MATERIAL RESPONSE
PART NAME ASSIGNED BY CONTROLLING AGENCYBOOT, DUST AND MOISTURE SEAL
END ITEM IDENTIFICATION2320-01-447-3889
MATERIALRUBBER
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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 12421720?
12421720 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What is the NSN for 12421720?
12421720 is cataloged in the U.S. Government catalog under NSN 5340-01-658-9178. 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.