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PartsTable / COMPONENT / SMB157018-3
SMB157018-3 ✓ 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 material: STEEL COMP 1008 OVERALL, thickness: 0.016 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN, hole_diameter: 0.252 INCHES MINIMUM AND 0.256 INCHES MAXIMUM IN, overall_diameter: 0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM 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 5310-00-559-0057, 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
SMB157018-3
NSN: 5310-00-559-0057
FSC: 5310
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
materialSTEEL COMP 1008 OVERALL
thickness0.016 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
hole_diameter0.252 INCHES MINIMUM AND 0.256 INCHES MAXIMUM IN
overall_diameter0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
surface_treatmentPHOSPHATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationQQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-559-0057
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: SMB157018-3 · 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
•
MATERIAL: STEEL COMP 1008 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT: PHOSPHATE OVERALL
•
OVERALL DIAMETER: 0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
•
CENTER HOLE SHAPE STYLE: ROUND
•
PERIPHERAL SHAPE STYLE: ROUND
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
THICKNESS: 0.016 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 1008 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTPHOSPHATE OVERALL
OVERALL DIAMETER0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
CENTER HOLE SHAPE STYLEROUND
PERIPHERAL SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
THICKNESS0.016 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
HOLE DIAMETER0.252 INCHES MINIMUM AND 0.256 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
532-92Interchangeable
interchangeable cross-reference
interchangeable
212106-3Interchangeable
interchangeable cross-reference
interchangeable
57MInterchangeable
interchangeable cross-reference
interchangeable
1107679Interchangeable
interchangeable cross-reference
interchangeable
1109437Interchangeable
interchangeable cross-reference
interchangeable
1C020-22-33-4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SMB157018-3?
SMB157018-3 is a WASHER,FLAT.
What parts can replace SMB157018-3?
There are 7 known substitutes for SMB157018-3: 532-92, 212106-3, 57M and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SMB157018-3?
SMB157018-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-559-0057. 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