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Technical Data Sheet
PartsTable / COMPONENT / SM-A-803657-1
SM-A-803657-1 ✓ 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,CONVEX is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, hole_diameter: 0.196 INCHES NOMINAL IN, outside_diameter: 0.375 INCHES NOMINAL IN, style_designator: CONVEX, surface_treatment: PASSIVATE OVERALL, material_thickness: 0.156 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-948-4399, 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
SM-A-803657-1
NSN: 5310-00-948-4399
FSC: 5310
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
hole_diameter0.196 INCHES NOMINAL IN
outside_diameter0.375 INCHES NOMINAL IN
style_designatorCONVEX
surface_treatmentPASSIVATE OVERALL
material_thickness0.156 INCHES NOMINAL IN
material_document_and_classificationASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-948-4399
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: SM-A-803657-1 · 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 303 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
STYLE DESIGNATOR: CONVEX
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL THICKNESS: 0.156 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 0.375 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.196 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 303 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
STYLE DESIGNATORCONVEX
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIAL THICKNESS0.156 INCHES NOMINAL IN
OUTSIDE DIAMETER0.375 INCHES NOMINAL IN
HOLE DIAMETER0.196 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
3163Interchangeable
interchangeable cross-reference
interchangeable
TL7479Interchangeable
interchangeable cross-reference
interchangeable
7479Interchangeable
interchangeable cross-reference
interchangeable
711625-2Interchangeable
interchangeable cross-reference
interchangeable
8496473Interchangeable
interchangeable cross-reference
interchangeable
214-1043P2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SM-A-803657-1?
SM-A-803657-1 is a WASHER,CONVEX.
What parts can replace SM-A-803657-1?
There are 20 known substitutes for SM-A-803657-1: 3163, TL7479, 7479 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SM-A-803657-1?
SM-A-803657-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-948-4399. 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