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6539-11-179-7101 — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

6539-11-179-7101: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: STEEL COMP 4130, design_type: FRICTION, overall_diameter: 2.1855 INCHES MINIMUM AND 2.1860 INCHES MAXIMUM IN, inside_diameter_length: 1.000 INCHES NOMINAL IN, round_cap_outside_surface_condition: SMOOTH, material_document_and_classification: MIL-S-6758, COMP 4130 MIL SPEC SINGLE MATERIAL RESPONSE. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-132-8247, 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
6539-11-179-7101
NSN: 5340-01-132-8247
FSC: 5340 — Hardware, Commercial
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 4130
design_typeFRICTION
overall_diameter2.1855 INCHES MINIMUM AND 2.1860 INCHES MAXIMUM IN
inside_diameter_length1.000 INCHES NOMINAL IN
round_cap_outside_surface_conditionSMOOTH
material_document_and_classificationMIL-S-6758, COMP 4130 MIL SPEC SINGLE MATERIAL RESPONSE
NSN5340-01-132-8247
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 6539-11-179-7101 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
•
DESIGN TYPE: FRICTION
•
OVERALL DIAMETER: 2.1855 INCHES MINIMUM AND 2.1860 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6758, COMP 4130 MIL SPEC SINGLE MATERIAL RESPONSE
•
MATERIAL: STEEL COMP 4130
•
INSIDE DIAMETER LENGTH: 1.000 INCHES NOMINAL IN
•
ROUND CAP OUTSIDE SURFACE CONDITION: SMOOTH
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
OVERALL DIAMETER2.1855 INCHES MINIMUM AND 2.1860 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6758, COMP 4130 MIL SPEC SINGLE MATERIAL RESPONSE
MATERIALSTEEL COMP 4130
INSIDE DIAMETER LENGTH1.000 INCHES NOMINAL IN
ROUND CAP OUTSIDE SURFACE CONDITIONSMOOTH
SUBSTITUTES & CROSS-REFERENCES 3
SS8805Reference document
Same NSN cross-reference
Reference document — Secondary reference
SS8813Reference document
Same NSN cross-reference
Reference document — Secondary reference
PL 65391-11797Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 6539-11-179-7101?
6539-11-179-7101 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace 6539-11-179-7101?
There are 3 known substitutes for 6539-11-179-7101: SS8805, SS8813, PL 65391-11797. Substitute compatibility should be verified for your specific system.
What is the NSN for 6539-11-179-7101?
6539-11-179-7101 is cataloged in the U.S. Government catalog under NSN 5340-01-132-8247. This indicates validated use in U.S. government and defense supply chains.
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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.