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Technical Data Sheet
PartsTable / COMPONENT / 21058-01
21058-01 ✓ 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 170 OVERALL, hole_diameter: 0.252 INCHES MINIMUM AND 0.254 INCHES MAXIMUM IN, overall_height: 0.015 INCHES MINIMUM AND 0.017 INCHES MAXIMUM IN, surface_finish: 32.0 MICROINCHES ALL SURFACES, outside_diameter: 0.380 INCHES MINIMUM AND 0.392 INCHES MAXIMUM IN, style_designator: SPRING TENSION. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-432-5577, 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
21058-01
NSN: 5310-00-432-5577
FSC: 5310
CAGE: 06401 — L3 TECHNOLOGIES, INC. DBA COMMUNICATION SYSTEMS-WEST DIV COMMUNICATION SYSTEMS-WEST (USA)
SPECIFICATIONS
materialCOPPER ALLOY 170 OVERALL
hole_diameter0.252 INCHES MINIMUM AND 0.254 INCHES MAXIMUM IN
overall_height0.015 INCHES MINIMUM AND 0.017 INCHES MAXIMUM IN
surface_finish32.0 MICROINCHES ALL SURFACES
outside_diameter0.380 INCHES MINIMUM AND 0.392 INCHES MAXIMUM IN
style_designatorSPRING TENSION
material_thickness0.0080 INCHES MINIMUM AND 0.0084 INCHES MAXIMUM IN
material_document_and_classificationQQ-C-;33,TEMPER 1/4 H FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-432-5577
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 21058-01 · 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
•
OUTSIDE DIAMETER: 0.380 INCHES MINIMUM AND 0.392 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SPRING TENSION
•
SURFACE FINISH: 32.0 MICROINCHES ALL SURFACES
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-C-;33,TEMPER 1/4 H FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL THICKNESS: 0.0080 INCHES MINIMUM AND 0.0084 INCHES MAXIMUM IN
•
MATERIAL: COPPER ALLOY 170 OVERALL
•
HOLE DIAMETER: 0.252 INCHES MINIMUM AND 0.254 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER0.380 INCHES MINIMUM AND 0.392 INCHES MAXIMUM IN
STYLE DESIGNATORSPRING TENSION
SURFACE FINISH32.0 MICROINCHES ALL SURFACES
OVERALL HEIGHT0.015 INCHES MINIMUM AND 0.017 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-C-;33,TEMPER 1/4 H FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL THICKNESS0.0080 INCHES MINIMUM AND 0.0084 INCHES MAXIMUM IN
MATERIALCOPPER ALLOY 170 OVERALL
HOLE DIAMETER0.252 INCHES MINIMUM AND 0.254 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
21058-1Interchangeable
interchangeable cross-reference
interchangeable
21058Interchangeable
interchangeable cross-reference
interchangeable
144-473-0Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21058-01?
21058-01 is a WASHER,SPRING TENSION.
What parts can replace 21058-01?
There are 3 known substitutes for 21058-01: 21058-1, 21058, 144-473-0. Substitute compatibility should be verified for your specific system.
Is 21058-01 still available?
21058-01 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