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4A6021 ✓ 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: COPPER ALLOY OVERALL, hole_diameter: 0.265 INCHES NOMINAL IN, overall_height: 0.055 INCHES NOMINAL IN, outside_diameter: 0.437 INCHES NOMINAL IN, style_designator: SPRING TENSION, material_thickness: 0.032 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-595-7571, 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
4A6021
NSN: 5310-00-595-7571
FSC: 5310
CAGE: 95201 — NAPCO INTERNATIONAL LLC DBA NAPCO INTERNATIONAL INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
hole_diameter0.265 INCHES NOMINAL IN
overall_height0.055 INCHES NOMINAL IN
outside_diameter0.437 INCHES NOMINAL IN
style_designatorSPRING TENSION
material_thickness0.032 INCHES NOMINAL IN
NSN5310-00-595-7571
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4A6021 · 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: COPPER ALLOY OVERALL
•
HOLE DIAMETER: 0.265 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.032 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 0.437 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SPRING TENSION
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER ALLOY OVERALL
HOLE DIAMETER0.265 INCHES NOMINAL IN
OVERALL HEIGHT0.055 INCHES NOMINAL IN
MATERIAL THICKNESS0.032 INCHES NOMINAL IN
OUTSIDE DIAMETER0.437 INCHES NOMINAL IN
STYLE DESIGNATORSPRING TENSION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
320094Interchangeable
interchangeable cross-reference
interchangeable
296-970105Interchangeable
interchangeable cross-reference
interchangeable
404Interchangeable
interchangeable cross-reference
interchangeable
70419Interchangeable
interchangeable cross-reference
interchangeable
70400Interchangeable
interchangeable cross-reference
interchangeable
13026360Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4A6021?
4A6021 is a WASHER,SPRING TENSION.
What parts can replace 4A6021?
There are 19 known substitutes for 4A6021: 320094, 296-970105, 404 and 16 more. Substitute compatibility should be verified for your specific system.
Is 4A6021 still available?
4A6021 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