PartsTable
Technical Data Sheet
PartsTable / COMPONENT / MILR5521
MILR5521 ✓ 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 GASKET is a the manufacturer industrial component. Key specifications include material: LEATHER OVERALL, peripheral_diameter: 1.234 INCHES MINIMUM AND 1.266 INCHES MAXIMUM IN, center_hole_diameter: 0.968 INCHES MINIMUM AND 1.030 INCHES MAXIMUM IN, cross-sectional_height: 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN, cross-sectional_shape_style: SQUARE/RECTANGULAR, material_document_and_classification: MIL-W-5521 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-058-2813, 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
MILR5521
NSN: 5310-00-058-2813
FSC: 5310
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialLEATHER OVERALL
peripheral_diameter1.234 INCHES MINIMUM AND 1.266 INCHES MAXIMUM IN
center_hole_diameter0.968 INCHES MINIMUM AND 1.030 INCHES MAXIMUM IN
cross-sectional_height0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN
cross-sectional_shape_styleSQUARE/RECTANGULAR
material_document_and_classificationMIL-W-5521 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-058-2813
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MILR5521 · 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
•
CENTER HOLE SHAPE STYLE: ROUND
•
MATERIAL: LEATHER OVERALL
•
OVERALL DIAMETER: 0.422 INCHES MINIMUM AND 0.453 INCHES MAXIMUM IN
•
THICKNESS: 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
HOLE DIAMETER: 0.3185 INCHES MINIMUM AND 0.3335 INCHES MAXIMUM IN
•
MINIMUM TENSILE STRENGTH: 2500 POUNDS PER SQUARE INCH LBS
•
PERIPHERAL SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE SHAPE STYLEROUND
MATERIALLEATHER OVERALL
OVERALL DIAMETER0.422 INCHES MINIMUM AND 0.453 INCHES MAXIMUM IN
THICKNESS0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.3185 INCHES MINIMUM AND 0.3335 INCHES MAXIMUM IN
MINIMUM TENSILE STRENGTH2500 POUNDS PER SQUARE INCH LBS
PERIPHERAL SHAPE STYLEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
MILR5521Interchangeable
interchangeable cross-reference
interchangeable
AN6246PC23Interchangeable
interchangeable cross-reference
interchangeable
1283-218Interchangeable
interchangeable cross-reference
interchangeable
P793Interchangeable
interchangeable cross-reference
interchangeable
582838Interchangeable
interchangeable cross-reference
interchangeable
582868Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy MILR5521?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is MILR5521?
MILR5521 is a GASKET.
What parts can replace MILR5521?
There are 19 known substitutes for MILR5521: MILR5521, AN6246PC23, 1283-218 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MILR5521?
MILR5521 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-058-2813. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — MILR5521

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026