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PartsTable / COMPONENT / MILW21338TYPE1CLASS2SIZE06
MILW21338TYPE1CLASS2SIZE06 ✓ 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,KEY is a the manufacturer industrial component. Key specifications include hole_diameter: 1.193 INCHES MINIMUM AND 1.213 INCHES MAXIMUM IN, outside_diameter: 1.500 INCHES MINIMUM AND 1.515 INCHES MAXIMUM IN, style_designator: KEY, surface_treatment: ZINC AND CHROMATE OVERALL, material_thickness: 0.050 INCHES NOMINAL IN, external_key_quantity: 13. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-186-1063, 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
MILW21338TYPE1CLASS2SIZE06
NSN: 5310-00-186-1063
FSC: 5310
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
hole_diameter1.193 INCHES MINIMUM AND 1.213 INCHES MAXIMUM IN
outside_diameter1.500 INCHES MINIMUM AND 1.515 INCHES MAXIMUM IN
style_designatorKEY
surface_treatmentZINC AND CHROMATE OVERALL
material_thickness0.050 INCHES NOMINAL IN
external_key_quantity13
external_prebent_key_width0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN
internal_prebent_key_width0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN
internal_prebent_key_length0.094 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
overall_distance_including_keys1.922 INCHES NOMINAL IN
material_document_and_classification66 FED STD ALL MATERIAL RESPONSES OVERALL
NSN5310-00-186-1063
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MILW21338TYPE1CLASS2SIZE06 · 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
•
MATERIAL THICKNESS: 0.050 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
OVERALL DISTANCE INCLUDING KEYS: 1.922 INCHES NOMINAL IN
•
SURFACE TREATMENT: ZINC AND CHROMATE OVERALL
•
OUTSIDE DIAMETER: 1.500 INCHES MINIMUM AND 1.515 INCHES MAXIMUM IN
•
EXTERNAL KEY QUANTITY: 13
•
INTERNAL PREBENT KEY WIDTH: 0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN
•
INTERNAL PREBENT KEY LENGTH: 0.094 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL THICKNESS0.050 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
OVERALL DISTANCE INCLUDING KEYS1.922 INCHES NOMINAL IN
SURFACE TREATMENTZINC AND CHROMATE OVERALL
OUTSIDE DIAMETER1.500 INCHES MINIMUM AND 1.515 INCHES MAXIMUM IN
EXTERNAL KEY QUANTITY13
INTERNAL PREBENT KEY WIDTH0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN
INTERNAL PREBENT KEY LENGTH0.094 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
EXTERNAL PREBENT KEY WIDTH0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN
MATERIALSTEEL COMP 1005 OR STEEL COMP 1006 OR STEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1012 OR STEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1026 OR STEEL COMP 1030 OR STEEL COMP 1034 OR STEEL COMP 1035 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
9880Interchangeable
interchangeable cross-reference
interchangeable
0BTAINInterchangeable
interchangeable cross-reference
interchangeable
D19Interchangeable
interchangeable cross-reference
interchangeable
A2319Interchangeable
interchangeable cross-reference
interchangeable
W06ZINCC0ATEDInterchangeable
Same NIIN cross-reference
interchangeable
12-Z-335-237Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MILW21338TYPE1CLASS2SIZE06?
MILW21338TYPE1CLASS2SIZE06 is a WASHER,KEY.
What parts can replace MILW21338TYPE1CLASS2SIZE06?
There are 6 known substitutes for MILW21338TYPE1CLASS2SIZE06: 9880, 0BTAIN, D19 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MILW21338TYPE1CLASS2SIZE06?
MILW21338TYPE1CLASS2SIZE06 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-186-1063. 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