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1278001 — BOOT,DUST AND MOISTURE SEAL

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

1278001: BOOT,DUST AND MOISTURE SEAL.

The BOOT,DUST AND MOISTURE SEAL is a the manufacturer industrial component. Key specifications include overall_height: 1.531 INCHES NOMINAL IN, sealing_method: COMPRESSION, base_outside_diameter: 1.687 INCHES NOMINAL IN, opening_inside_diameter: 2.375 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-770-7278, 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
1278001
NSN: 5340-00-770-7278
FSC: 5340 — Hardware, Commercial
CAGE: 12204 — CHRYSLER REALTY COMPANY LLC DBA DAIMLER CHRYSLER (USA)
SPECIFICATIONS
overall_height1.531 INCHES NOMINAL IN
sealing_methodCOMPRESSION
base_outside_diameter1.687 INCHES NOMINAL IN
opening_inside_diameter2.375 INCHES NOMINAL IN
NSN5340-00-770-7278
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1278001 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
•
SEALING METHOD: COMPRESSION
•
OPENING INSIDE DIAMETER: 2.375 INCHES NOMINAL IN
•
BASE OUTSIDE DIAMETER: 1.687 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.531 INCHES NOMINAL IN
SEALING METHODCOMPRESSION
OPENING INSIDE DIAMETER2.375 INCHES NOMINAL IN
BASE OUTSIDE DIAMETER1.687 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 1
7707278Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1278001?
1278001 is a BOOT,DUST AND MOISTURE SEAL.
What parts can replace 1278001?
There is 1 known substitute for 1278001: 7707278. Substitute compatibility should be verified for your specific system.
What is the NSN for 1278001?
1278001 is cataloged in the U.S. Government catalog under NSN 5340-00-770-7278. 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.