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218322 ✓ 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 OVERALL, thickness: 0.025 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN, hole_diameter: 0.120 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN, overall_diameter: 0.307 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN, surface_treatment: CADMIUM AND CHROMATE OVERALL, peripheral_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 5310-00-021-8322, 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
218322
NSN: 5310-00-021-8322
FSC: 5310
CAGE: 24617 — GENERAL MOTORS CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.025 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN
hole_diameter0.120 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN
overall_diameter0.307 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
end_item_identificationMULTIPLE LAUNCH ROCKET SYSTEM (MLRS); A4 BRADLEY FIGHTING VEHICLE
cross-sectional_shape_styleRECTANGULAR
nondefinitive_spec/std_dataA TYPE AND 1 GRADE
material_document_and_classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-021-8322
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 218322 · 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: 0.125 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 1010 OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
DEPARTURE FROM CITED DOCUMENT: AS MODIFIED BY SURFACE FINISH AND HOLE DIA
•
NONDEFINITIVE SPEC/STD DATA: A TYPE
•
THICKNESS: 0.032 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633,COMP FS1010-CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER0.125 INCHES NOMINAL IN
MATERIALSTEEL COMP 1010 OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
DEPARTURE FROM CITED DOCUMENTAS MODIFIED BY SURFACE FINISH AND HOLE DIA
NONDEFINITIVE SPEC/STD DATAA TYPE
THICKNESS0.032 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633,COMP FS1010-CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OVERALL DIAMETER0.312 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
21168NPC20Interchangeable
interchangeable cross-reference
interchangeable
46833Interchangeable
interchangeable cross-reference
interchangeable
MS9321-05Interchangeable
interchangeable cross-reference
interchangeable
218322Interchangeable
interchangeable cross-reference
interchangeable
5310PL0852916Interchangeable
interchangeable cross-reference
interchangeable
AN960-4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 218322?
218322 is a WASHER,FLAT.
What parts can replace 218322?
There are 13 known substitutes for 218322: 21168NPC20, 46833, MS9321-05 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 218322?
218322 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-021-8322. 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