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6566-20-327-0102 — WASHER,SPLIT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

6566-20-327-0102: WASHER,SPLIT.

The WASHER,SPLIT is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 7075 OVERALL, hole_diameter: 0.525 INCHES MINIMUM AND 0.535 INCHES MAXIMUM IN, outside_diameter: 0.990 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN, style_designator: SPLIT, material_thickness: 0.080 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN, distance_across_split_opening: 0.188 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-259-6534, 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
6566-20-327-0102
NSN: 5310-01-259-6534
FSC: 5310 — Nuts and Washers
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 7075 OVERALL
hole_diameter0.525 INCHES MINIMUM AND 0.535 INCHES MAXIMUM IN
outside_diameter0.990 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
style_designatorSPLIT
material_thickness0.080 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
distance_across_split_opening0.188 INCHES NOMINAL IN
material_document_and_classificationQQ-A-225/9 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-259-6534
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6566-20-327-0102 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
DISTANCE ACROSS SPLIT OPENING: 0.188 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SPLIT
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/9 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.990 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.080 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
•
MATERIAL: ALUMINUM ALLOY 7075 OVERALL
•
HOLE DIAMETER: 0.525 INCHES MINIMUM AND 0.535 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
DISTANCE ACROSS SPLIT OPENING0.188 INCHES NOMINAL IN
STYLE DESIGNATORSPLIT
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/9 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.990 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
MATERIAL THICKNESS0.080 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
MATERIALALUMINUM ALLOY 7075 OVERALL
HOLE DIAMETER0.525 INCHES MINIMUM AND 0.535 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
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 6566-20-327-0102?
6566-20-327-0102 is a WASHER,SPLIT.
What is the NSN for 6566-20-327-0102?
6566-20-327-0102 is cataloged in the U.S. Government catalog under NSN 5310-01-259-6534. 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.