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A20483 ✓ 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 WASHER,CONVEX is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1010 OVERALL, temp_rating: 275.0 FAHRENHEIT DEGF, hole_diameter: 0.328 INCHES MINIMUM AND 0.359 INCHES MAXIMUM IN, outside_diameter: 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN, special_features: DO NOT USE ON THE T-55 TURBINE ENGINE, style_designator: CONVEX. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-533-6664, 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
A20483
NSN: 5310-00-533-6664
FSC: 5310
CAGE: U4574 — FNH UK LTD (GBR)
SPECIFICATIONS
materialSTEEL COMP 1010 OVERALL
temp_rating275.0 FAHRENHEIT DEGF
hole_diameter0.328 INCHES MINIMUM AND 0.359 INCHES MAXIMUM IN
outside_diameter0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
special_featuresDO NOT USE ON THE T-55 TURBINE ENGINE
style_designatorCONVEX
material_thickness0.094 INCHES NOMINAL IN
center_hole_diameter0.234 INCHES MINIMUM AND 0.244 INCHES MAXIMUM IN
cross-sectional_height0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
material_document_and_classificationQQ-S-633-CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-533-6664
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A20483 · 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
•
MATERIAL THICKNESS: 0.094 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 1010 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633-CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
STYLE DESIGNATOR: CONVEX
•
OUTSIDE DIAMETER: 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.328 INCHES MINIMUM AND 0.359 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL THICKNESS0.094 INCHES NOMINAL IN
MATERIALSTEEL COMP 1010 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633-CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL
STYLE DESIGNATORCONVEX
OUTSIDE DIAMETER0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
HOLE DIAMETER0.328 INCHES MINIMUM AND 0.359 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
101-00500Interchangeable
interchangeable cross-reference
interchangeable
MS28775-010Interchangeable
interchangeable cross-reference
interchangeable
58-010-15Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A20483?
A20483 is a WASHER,CONVEX.
What parts can replace A20483?
There are 3 known substitutes for A20483: 101-00500, MS28775-010, 58-010-15. Substitute compatibility should be verified for your specific system.
Is A20483 still available?
A20483 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026