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Technical Data Sheet
PartsTable / COMPONENT / 766-20
766-20 ✓ Verified by PartsTable
Hotpoint · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include material: ALUMINUM ALLOY 6061 OVERALL, body_style: ROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACE, power_rating: 20.0 WATTS AVERAGE AND 1.0 KILOWATTS PEAK, recess_angle: 89.5 DEGREES MINIMUM AND 90.5 DEGREES MAXIMUM, recess_depth: 0.015 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN, hole_diameter: 1.805 INCHES MINIMUM AND 1.807 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-543-2252, 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
766-20
NSN: 5310-00-543-2252
FSC: 5310
CAGE: 24930 — L3HARRIS TECHNOLOGIES, INC DIV SPACE & AIRBORNE SYSTEMS (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 OVERALL
body_styleROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACE
power_rating20.0 WATTS AVERAGE AND 1.0 KILOWATTS PEAK
recess_angle89.5 DEGREES MINIMUM AND 90.5 DEGREES MAXIMUM
recess_depth0.015 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
hole_diameter1.805 INCHES MINIMUM AND 1.807 INCHES MAXIMUM IN
overall_length3.125 INCHES NOMINAL IN
surface_finish40.0 MICROINCHES ALL SURFACES
frequency_range0.000 HERTZ MINIMUM AND 4.000 GIGAHERTZ MAXIMUM
mounting_methodCONNECTOR
recess_diameter1.855 INCHES MINIMUM AND 1.857 INCHES MAXIMUM IN
outside_diameter2.458 INCHES MINIMUM AND 2.460 INCHES MAXIMUM IN
NSN5310-00-543-2252
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 766-20 · Hotpoint ⚠ 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
•
TOP RECESS DIAMETER: 1.855 INCHES MINIMUM AND 1.857 INCHES MAXIMUM IN
•
MATERIAL: ALUMINUM ALLOY 6061 OVERALL
•
SURFACE FINISH: 40.0 MICROINCHES ALL SURFACES
•
STYLE DESIGNATOR: RECESSED BOTH SIDES
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-327 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT: CHROMATE OVERALL
•
RECESS DIAMETER: 1.855 INCHES MINIMUM AND 1.857 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
TOP RECESS DIAMETER1.855 INCHES MINIMUM AND 1.857 INCHES MAXIMUM IN
MATERIALALUMINUM ALLOY 6061 OVERALL
SURFACE FINISH40.0 MICROINCHES ALL SURFACES
STYLE DESIGNATORRECESSED BOTH SIDES
SPECIAL FEATURESBOTH OUTSIDE EDGES ARE CHAMFERED 0.025 INCH BY 45 DEGREES PORM 1/2 DEGREE IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-327 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTCHROMATE OVERALL
RECESS DIAMETER1.855 INCHES MINIMUM AND 1.857 INCHES MAXIMUM IN
BOTTOM RECESS DIAMETER1.855 INCHES MINIMUM AND 1.857 INCHES MAXIMUM IN
RECESS DEPTH0.015 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
539071Interchangeable
interchangeable cross-reference
interchangeable
766A-20Interchangeable
interchangeable cross-reference
interchangeable
13013-04Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 766-20?
766-20 is a CONNECTOR,RECEPTACLE,ELECTRICAL manufactured by Hotpoint.
What parts can replace 766-20?
There are 3 known substitutes for 766-20: 539071, 766A-20, 13013-04. Substitute compatibility should be verified for your specific system.
What is the NSN for 766-20?
766-20 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-543-2252. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026