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PartsTable / COMPONENT / 6640211 FIND 32
6640211 FIND 32 ✓ 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 thickness: 0.074 INCHES MINIMUM AND 0.121 INCHES MAXIMUM IN, hole_diameter: 0.526 INCHES MINIMUM AND 0.546 INCHES MAXIMUM IN, hardness_rating: 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM, overall_diameter: 1.055 INCHES MINIMUM AND 1.092 INCHES MAXIMUM IN, surface_treatment: ZINC 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 5310-01-266-4641, 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
6640211 FIND 32
NSN: 5310-01-266-4641
FSC: 5310
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialSTEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL
thickness0.074 INCHES MINIMUM AND 0.121 INCHES MAXIMUM IN
hole_diameter0.526 INCHES MINIMUM AND 0.546 INCHES MAXIMUM IN
hardness_rating34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
overall_diameter1.055 INCHES MINIMUM AND 1.092 INCHES MAXIMUM IN
surface_treatmentZINC AND CHROMATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
nondefinitive_spec/std_dataA CLASS AND A TYPE AND 1 GRADE
material_document_and_classificationASTM A108 ASSN STD ALL MATERIAL RESPONSES OVERALL
surface_treatment_document_and_classificationASTM B633,TY 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-266-4641
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6640211 FIND 32 · 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: STEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL
•
HARDNESS RATING: 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
•
CENTER HOLE SHAPE STYLE: ROUND
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A108 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM B633,TY 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
SURFACE TREATMENT: ZINC AND CHROMATE OVERALL
•
HOLE DIAMETER: 0.526 INCHES MINIMUM AND 0.546 INCHES MAXIMUM IN
•
NONDEFINITIVE SPEC/STD DATA: A CLASS AND A TYPE AND 1 GRADE
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL
HARDNESS RATING34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
CENTER HOLE SHAPE STYLEROUND
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A108 ASSN STD ALL MATERIAL RESPONSES OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM B633,TY 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTZINC AND CHROMATE OVERALL
HOLE DIAMETER0.526 INCHES MINIMUM AND 0.546 INCHES MAXIMUM IN
NONDEFINITIVE SPEC/STD DATAA CLASS AND A TYPE AND 1 GRADE
OVERALL DIAMETER1.055 INCHES MINIMUM AND 1.092 INCHES MAXIMUM IN
PERIPHERAL SHAPE STYLEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
88-20564-12Interchangeable
interchangeable cross-reference
interchangeable
88-20033-25AInterchangeable
interchangeable cross-reference
interchangeable
MS51412-25Interchangeable
interchangeable cross-reference
interchangeable
MS27183-10Interchangeable
interchangeable cross-reference
interchangeable
G9419274Interchangeable
interchangeable cross-reference
interchangeable
1DD598Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6640211 FIND 32?
6640211 FIND 32 is a WASHER,FLAT.
What parts can replace 6640211 FIND 32?
There are 26 known substitutes for 6640211 FIND 32: 88-20564-12, 88-20033-25A, MS51412-25 and 23 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 6640211 FIND 32?
6640211 FIND 32 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-266-4641. 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