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PartsTable / COMPONENT / 645790
645790 ✓ 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,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1045 OVERALL, hole_diameter: 0.766 INCHES NOMINAL IN, overall_height: 0.156 INCHES NOMINAL IN, outside_diameter: 1.656 INCHES NOMINAL IN, style_designator: SPRING TENSION, material_thickness: 0.030 INCHES MINIMUM AND 0.032 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-285-1010, 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
645790
NSN: 5310-00-285-1010
FSC: 5310
CAGE: 34623 — AM GENERAL LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 1045 OVERALL
hole_diameter0.766 INCHES NOMINAL IN
overall_height0.156 INCHES NOMINAL IN
outside_diameter1.656 INCHES NOMINAL IN
style_designatorSPRING TENSION
material_thickness0.030 INCHES MINIMUM AND 0.032 INCHES MAXIMUM IN
material_document_and_classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-285-1010
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 645790 · 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: STEEL COMP 1010 OVERALL
•
OUTSIDE DIAMETER: 1.646 INCHES MINIMUM AND 1.666 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.028 INCHES MINIMUM AND 0.032 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.756 INCHES MINIMUM AND 0.776 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
STYLE DESIGNATOR: SPRING TENSION
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 1010 OVERALL
OUTSIDE DIAMETER1.646 INCHES MINIMUM AND 1.666 INCHES MAXIMUM IN
MATERIAL THICKNESS0.028 INCHES MINIMUM AND 0.032 INCHES MAXIMUM IN
OVERALL HEIGHT0.188 INCHES NOMINAL IN
HOLE DIAMETER0.756 INCHES MINIMUM AND 0.776 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
STYLE DESIGNATORSPRING TENSION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
645790Interchangeable
interchangeable cross-reference
interchangeable
710015-2REVAInterchangeable
interchangeable cross-reference
interchangeable
1-338-1Interchangeable
interchangeable cross-reference
interchangeable
710015-007Interchangeable
interchangeable cross-reference
interchangeable
133383Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 645790?
645790 is a WASHER,SPRING TENSION.
What parts can replace 645790?
There are 5 known substitutes for 645790: 645790, 710015-2REVA, 1-338-1 and 2 more. Substitute compatibility should be verified for your specific system.
Is 645790 still available?
645790 is currently cancelled.
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Last verified: July 2026