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Technical Data Sheet
PartsTable / COMPONENT / 55-22301-64
55-22301-64 ✓ 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,SHOULDERED is a the manufacturer industrial component. Key specifications include hole_diameter: 1.297 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN, shoulder_height: 0.188 INCHES NOMINAL IN, outside_diameter: 1.844 INCHES MINIMUM AND 1.859 INCHES MAXIMUM IN, style_designator: SHOULDERED, shoulder_diameter: 1.623 INCHES MINIMUM AND 1.625 INCHES MAXIMUM IN, material_thickness: 0.125 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-612-7539, 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
55-22301-64
NSN: 5310-00-612-7539
FSC: 5310
CAGE: 52081 — EURAMCO SAFETY INC (USA)
SPECIFICATIONS
hole_diameter1.297 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
shoulder_height0.188 INCHES NOMINAL IN
outside_diameter1.844 INCHES MINIMUM AND 1.859 INCHES MAXIMUM IN
style_designatorSHOULDERED
shoulder_diameter1.623 INCHES MINIMUM AND 1.625 INCHES MAXIMUM IN
material_thickness0.125 INCHES NOMINAL IN
material_document_and_classificationMIL-C-15345 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-612-7539
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 55-22301-64 · 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
•
HOLE DIAMETER: 1.297 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 1.844 INCHES MINIMUM AND 1.859 INCHES MAXIMUM IN
•
SHOULDER DIAMETER: 1.623 INCHES MINIMUM AND 1.625 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SHOULDERED
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-C-15345 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL THICKNESS: 0.125 INCHES NOMINAL IN
•
SHOULDER HEIGHT: 0.188 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER1.297 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
OUTSIDE DIAMETER1.844 INCHES MINIMUM AND 1.859 INCHES MAXIMUM IN
SHOULDER DIAMETER1.623 INCHES MINIMUM AND 1.625 INCHES MAXIMUM IN
STYLE DESIGNATORSHOULDERED
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-C-15345 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL THICKNESS0.125 INCHES NOMINAL IN
SHOULDER HEIGHT0.188 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
E-40Interchangeable
interchangeable cross-reference
interchangeable
E-63Interchangeable
interchangeable cross-reference
interchangeable
E00063Interchangeable
interchangeable cross-reference
interchangeable
12-09782-00Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 55-22301-64?
55-22301-64 is a WASHER,SHOULDERED.
What parts can replace 55-22301-64?
There are 4 known substitutes for 55-22301-64: E-40, E-63, E00063 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 55-22301-64?
55-22301-64 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-612-7539. 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