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Technical Data Sheet
PartsTable / COMPONENT / 750821
750821 ✓ Verified by PartsTable
— · 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

The PLATE,RETAINING,BEARING is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 6061 OVERALL, overall_thickness: 0.7150 INCHES MINIMUM AND 0.7250 INCHES MAXIMUM IN, surface_treatment: CHROMATE OVERALL, material_document_and_classification: AMS 4117 ASSN STD SINGLE MATERIAL RESPONSE OVERALL, surface_treatment_document_and_classification: MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-400-8510, 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
750821
NSN: 5310-00-400-8510
FSC: 5310
CAGE: 82340 — L3HARRIS TECHNOLOGIES, INC. DIV SPACE AND AIRBORNE SYSTEMS (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 OVERALL
overall_thickness0.7150 INCHES MINIMUM AND 0.7250 INCHES MAXIMUM IN
surface_treatmentCHROMATE OVERALL
material_document_and_classificationAMS 4117 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-400-8510
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 750821 · 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
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
THICKNESS: 0.188 INCHES NOMINAL IN
•
OVERALL DIAMETER: 0.625 INCHES NOMINAL IN
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.395 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-S-767 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
THICKNESS0.188 INCHES NOMINAL IN
OVERALL DIAMETER0.625 INCHES NOMINAL IN
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.395 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN
PERIPHERAL SHAPE STYLEROUND
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-S-767 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 304 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
373205-1Interchangeable
interchangeable cross-reference
interchangeable
1G98-1Interchangeable
interchangeable cross-reference
interchangeable
1218-1Interchangeable
interchangeable cross-reference
interchangeable
110 31/64Interchangeable
interchangeable cross-reference
interchangeable
1302Interchangeable
interchangeable cross-reference
interchangeable
310-RTInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 750821?
750821 is a PLATE,RETAINING,BEARING.
What parts can replace 750821?
There are 19 known substitutes for 750821: 373205-1, 1G98-1, 1218-1 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 750821?
750821 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-400-8510. 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