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6539856-1 — BOOT,DUST AND MOISTURE SEAL

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

6539856-1: BOOT,DUST AND MOISTURE SEAL.

The BOOT,DUST AND MOISTURE SEAL is a the manufacturer industrial component. Key specifications include material: RUBBER BODY, overall_height: 1.570 INCHES NOMINAL IN, style_designator: THRU-HOLE, body_outside_diameter: 1.940 INCHES NOMINAL IN, opening_inside_diameter: 0.560 INCHES NOMINAL IN, material_document_and_classification: ASTM D2000,3BC614A14B14C12F19 ASSN STD SINGLE MATERIAL RESPONSE BODY. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-368-8064, 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
6539856-1
NSN: 5340-01-368-8064
FSC: 5340 — Hardware, Commercial
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialRUBBER BODY
overall_height1.570 INCHES NOMINAL IN
style_designatorTHRU-HOLE
body_outside_diameter1.940 INCHES NOMINAL IN
opening_inside_diameter0.560 INCHES NOMINAL IN
material_document_and_classificationASTM D2000,3BC614A14B14C12F19 ASSN STD SINGLE MATERIAL RESPONSE BODY
NSN5340-01-368-8064
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 6539856-1 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
•
OPENING INSIDE DIAMETER: 0.560 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 1.940 INCHES NOMINAL IN
•
STYLE DESIGNATOR: THRU-HOLE
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM D2000,3BC614A14B14C12F19 ASSN STD SINGLE MATERIAL RESPONSE BODY
•
MATERIAL: RUBBER BODY
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.570 INCHES NOMINAL IN
OPENING INSIDE DIAMETER0.560 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER1.940 INCHES NOMINAL IN
STYLE DESIGNATORTHRU-HOLE
MATERIAL DOCUMENT AND CLASSIFICATIONASTM D2000,3BC614A14B14C12F19 ASSN STD SINGLE MATERIAL RESPONSE BODY
MATERIALRUBBER BODY
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 6539856-1?
6539856-1 is a BOOT,DUST AND MOISTURE SEAL.
What is the NSN for 6539856-1?
6539856-1 is cataloged in the U.S. Government catalog under NSN 5340-01-368-8064. 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.