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6566-21-122-3101 — BOOT,DUST AND MOISTURE SEAL

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

6566-21-122-3101: BOOT,DUST AND MOISTURE SEAL.

The BOOT,DUST AND MOISTURE SEAL is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYURETHANE BODY, overall_height: 0.680 INCHES NOMINAL IN, sealing_method: COMPRESSION, mounting_method: COMPRESSION, style_designator: THRU-HOLE, material_thickness: 0.045 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-129-8111, 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
6566-21-122-3101
NSN: 5340-01-129-8111
FSC: 5340 — Hardware, Commercial
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialPLASTIC POLYURETHANE BODY
overall_height0.680 INCHES NOMINAL IN
sealing_methodCOMPRESSION
mounting_methodCOMPRESSION
style_designatorTHRU-HOLE
material_thickness0.045 INCHES NOMINAL IN
base_inside_diameter0.450 INCHES NOMINAL IN
body_outside_diameter1.380 INCHES NOMINAL IN
opening_inside_diameter0.710 INCHES NOMINAL IN
material_document_and_classificationS59530,GRADE 50,FSCM 78286 MFR REF SINGLE MATERIAL RESPONSE BODY
NSN5340-01-129-8111
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 6566-21-122-3101 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: 0.710 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 1.380 INCHES NOMINAL IN
•
MOUNTING METHOD: COMPRESSION
•
STYLE DESIGNATOR: THRU-HOLE
•
MATERIAL DOCUMENT AND CLASSIFICATION: S59530,GRADE 50,FSCM 78286 MFR REF SINGLE MATERIAL RESPONSE BODY
•
MATERIAL THICKNESS: 0.045 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.680 INCHES NOMINAL IN
SEALING METHODCOMPRESSION
OPENING INSIDE DIAMETER0.710 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER1.380 INCHES NOMINAL IN
MOUNTING METHODCOMPRESSION
STYLE DESIGNATORTHRU-HOLE
MATERIAL DOCUMENT AND CLASSIFICATIONS59530,GRADE 50,FSCM 78286 MFR REF SINGLE MATERIAL RESPONSE BODY
MATERIAL THICKNESS0.045 INCHES NOMINAL IN
BASE INSIDE DIAMETER0.450 INCHES NOMINAL IN
MATERIALPLASTIC POLYURETHANE 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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 6566-21-122-3101?
6566-21-122-3101 is a BOOT,DUST AND MOISTURE SEAL.
What is the NSN for 6566-21-122-3101?
6566-21-122-3101 is cataloged in the U.S. Government catalog under NSN 5340-01-129-8111. 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.