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Technical Data Sheet
PartsTable / COMPONENT / A364-81
A364-81 ✓ 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 material: PLASTIC POLYHEXAMETHYLENE ADIPAMIDE OVERALL, hole_diameter: 0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN, shoulder_height: 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN, outside_diameter: 0.320 INCHES NOMINAL IN, style_designator: SHOULDERED, shoulder_diameter: 0.182 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 5310-01-043-1404, 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
A364-81
NSN: 5310-01-043-1404
FSC: 5310
CAGE: 86928 — SEASTROM MANUFACTURING CO INC (USA)
SPECIFICATIONS
materialPLASTIC POLYHEXAMETHYLENE ADIPAMIDE OVERALL
hole_diameter0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
shoulder_height0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN
outside_diameter0.320 INCHES NOMINAL IN
style_designatorSHOULDERED
shoulder_diameter0.182 INCHES NOMINAL IN
material_thickness0.059 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN
material_document_and_classificationL-P-410 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-043-1404
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A364-81 · 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
•
STYLE DESIGNATOR: SHOULDERED
•
MATERIAL: PLASTIC POLYHEXAMETHYLENE ADIPAMIDE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: L-P-410 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
HOLE DIAMETER: 0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
•
SHOULDER HEIGHT: 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 0.320 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.059 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN
•
SHOULDER DIAMETER: 0.182 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORSHOULDERED
MATERIALPLASTIC POLYHEXAMETHYLENE ADIPAMIDE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONL-P-410 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
HOLE DIAMETER0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
SHOULDER HEIGHT0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN
OUTSIDE DIAMETER0.320 INCHES NOMINAL IN
MATERIAL THICKNESS0.059 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN
SHOULDER DIAMETER0.182 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
5E4720/08-2212Interchangeable
interchangeable cross-reference
interchangeable
MIL-R-55182/1Interchangeable
interchangeable cross-reference
interchangeable
RGP0207-22KInterchangeable
interchangeable cross-reference
interchangeable
CVCPICInterchangeable
interchangeable cross-reference
interchangeable
560766Interchangeable
interchangeable cross-reference
interchangeable
SM-B-876945Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A364-81?
A364-81 is a WASHER,SHOULDERED.
What parts can replace A364-81?
There are 6 known substitutes for A364-81: 5E4720/08-2212, MIL-R-55182/1, RGP0207-22K and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A364-81?
A364-81 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-043-1404. 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