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MILS5059A ✓ 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,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 301 OVERALL, thickness: 0.032 INCHES NOMINAL IN, hole_diameter: 0.266 INCHES MINIMUM AND 0.276 INCHES MAXIMUM IN, overall_diameter: 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-286-2781, 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
MILS5059A
NSN: 5310-00-286-2781
FSC: 5310
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL COMP 301 OVERALL
thickness0.032 INCHES NOMINAL IN
hole_diameter0.266 INCHES MINIMUM AND 0.276 INCHES MAXIMUM IN
overall_diameter0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
specification/standard_data43999-2W1 MANUFACTURERS STANDARD
material_document_and_classificationMIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-286-2781
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MILS5059A · 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
•
THICKNESS: 0.032 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.266 INCHES MINIMUM AND 0.276 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 301 OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
CENTER HOLE SHAPE STYLE: ROUND
•
PERIPHERAL SHAPE STYLE: ROUND
•
SPECIFICATION/STANDARD DATA: 43999-2W1 MANUFACTURERS STANDARD
•
OVERALL DIAMETER: 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
THICKNESS0.032 INCHES NOMINAL IN
HOLE DIAMETER0.266 INCHES MINIMUM AND 0.276 INCHES MAXIMUM IN
MATERIALSTEEL COMP 301 OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
CENTER HOLE SHAPE STYLEROUND
PERIPHERAL SHAPE STYLEROUND
SPECIFICATION/STANDARD DATA43999-2W1 MANUFACTURERS STANDARD
OVERALL DIAMETER0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
AN960-C416LInterchangeable
interchangeable cross-reference
interchangeable
5310005157449Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MILS5059A?
MILS5059A is a WASHER,FLAT.
What parts can replace MILS5059A?
There are 2 known substitutes for MILS5059A: AN960-C416L, 5310005157449. Substitute compatibility should be verified for your specific system.
What is the NSN for MILS5059A?
MILS5059A is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-286-2781. 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