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PartsTable / COMPONENT / SCB69389-3
SCB69389-3 ✓ 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: 0.092 INCHES MINIMUM AND 0.094 INCHES MAXIMUM IN, hole_diameter: 0.219 INCHES MINIMUM AND 0.224 INCHES MAXIMUM IN, surface_finish: 32.0 MICROINCHES BOTTOM, overall_diameter: 0.437 INCHES NOMINAL IN, surface_treatment: PHOSPHATE 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 5310-00-523-2003, 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
SCB69389-3
NSN: 5310-00-523-2003
FSC: 5310
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
thickness0.092 INCHES MINIMUM AND 0.094 INCHES MAXIMUM IN
hole_diameter0.219 INCHES MINIMUM AND 0.224 INCHES MAXIMUM IN
surface_finish32.0 MICROINCHES BOTTOM
overall_diameter0.437 INCHES NOMINAL IN
surface_treatmentPHOSPHATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-F-14072 FINISH E211 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-523-2003
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: SCB69389-3 · 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
•
SURFACE TREATMENT: PHOSPHATE OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-F-14072 FINISH E211 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE FINISH: 32.0 MICROINCHES BOTTOM
•
MATERIAL: 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 OVERALL
•
HOLE DIAMETER: 0.219 INCHES MINIMUM AND 0.224 INCHES MAXIMUM IN
•
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTPHOSPHATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-F-14072 FINISH E211 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE FINISH32.0 MICROINCHES BOTTOM
MATERIALSTEEL 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 OVERALL
SURFACE FINISH32.0 MICROINCHES TOP
HOLE DIAMETER0.219 INCHES MINIMUM AND 0.224 INCHES MAXIMUM IN
CENTER HOLE SHAPE STYLEROUND
OVERALL DIAMETER0.437 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
50148Interchangeable
interchangeable cross-reference
interchangeable
45M155A1C20Interchangeable
interchangeable cross-reference
interchangeable
100M-01062-01562-025Interchangeable
interchangeable cross-reference
interchangeable
8136Interchangeable
interchangeable cross-reference
interchangeable
59586R91Interchangeable
interchangeable cross-reference
interchangeable
27925Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SCB69389-3?
SCB69389-3 is a WASHER,FLAT.
What parts can replace SCB69389-3?
There are 14 known substitutes for SCB69389-3: 50148, 45M155A1C20, 100M-01062-01562-025 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SCB69389-3?
SCB69389-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-523-2003. 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