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6541-40-311-1108 — BOOT,DUST AND MOISTURE SEAL

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

6541-40-311-1108: BOOT,DUST AND MOISTURE SEAL.

The BOOT,DUST AND MOISTURE SEAL is a the manufacturer industrial component. Key specifications include body_height: 3.400 INCHES NOMINAL IN, overall_height: 5.600 INCHES NOMINAL IN, sealing_method: MECHANICAL, style_designator: THRU-HOLE, fsc_application_data: FLIGHT CONTROL SYSTEM, base_outside_diameter: 5.920 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-139-6786, 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
6541-40-311-1108
NSN: 5340-01-139-6786
FSC: 5340 — Hardware, Commercial
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
body_height3.400 INCHES NOMINAL IN
overall_height5.600 INCHES NOMINAL IN
sealing_methodMECHANICAL
style_designatorTHRU-HOLE
fsc_application_dataFLIGHT CONTROL SYSTEM
base_outside_diameter5.920 INCHES NOMINAL IN
body_outside_diameter4.860 INCHES NOMINAL IN
opening_inside_diameter1.510 INCHES NOMINAL IN
NSN5340-01-139-6786
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 6541-40-311-1108 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
•
FSC APPLICATION DATA: FLIGHT CONTROL SYSTEM
•
SEALING METHOD: MECHANICAL
•
OPENING INSIDE DIAMETER: 1.510 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 4.860 INCHES NOMINAL IN
•
BODY HEIGHT: 3.400 INCHES NOMINAL IN
•
STYLE DESIGNATOR: THRU-HOLE
•
BASE OUTSIDE DIAMETER: 5.920 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT5.600 INCHES NOMINAL IN
FSC APPLICATION DATAFLIGHT CONTROL SYSTEM
SEALING METHODMECHANICAL
OPENING INSIDE DIAMETER1.510 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER4.860 INCHES NOMINAL IN
BODY HEIGHT3.400 INCHES NOMINAL IN
STYLE DESIGNATORTHRU-HOLE
BASE OUTSIDE DIAMETER5.920 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 6541-40-311-1108?
6541-40-311-1108 is a BOOT,DUST AND MOISTURE SEAL.
What is the NSN for 6541-40-311-1108?
6541-40-311-1108 is cataloged in the U.S. Government catalog under NSN 5340-01-139-6786. 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.