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PartsTable / COMPONENT / 104-3S516A
104-3S516A ✓ 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,LOCK is a the manufacturer industrial component. Key specifications include hole_diameter: 0.318 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN, outside_diameter: 0.593 INCHES NOMINAL IN, style_designator: FLAT INTERNAL TEETH, surface_treatment: CADMIUM OR ZINC OVERALL, material_thickness: 0.036 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-186-7510, 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
104-3S516A
NSN: 5310-00-186-7510
FSC: 5310
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
hole_diameter0.318 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN
outside_diameter0.593 INCHES NOMINAL IN
style_designatorFLAT INTERNAL TEETH
surface_treatmentCADMIUM OR ZINC OVERALL
material_thickness0.036 INCHES NOMINAL IN
NSN5310-00-186-7510
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 104-3S516A · 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
•
STYLE DESIGNATOR: FLAT INTERNAL TEETH
•
HOLE DIAMETER: 0.318 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 0.593 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.036 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORFLAT INTERNAL TEETH
HOLE DIAMETER0.318 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN
OUTSIDE DIAMETER0.593 INCHES NOMINAL IN
MATERIAL THICKNESS0.036 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
10116602Interchangeable
interchangeable cross-reference
interchangeable
3F-9556Interchangeable
interchangeable cross-reference
interchangeable
1915Interchangeable
interchangeable cross-reference
interchangeable
121800Interchangeable
interchangeable cross-reference
interchangeable
120-GRInterchangeable
interchangeable cross-reference
interchangeable
STD475Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 104-3S516A?
104-3S516A is a WASHER,LOCK.
What parts can replace 104-3S516A?
There are 6 known substitutes for 104-3S516A: 10116602, 3F-9556, 1915 and 3 more. Substitute compatibility should be verified for your specific system.
Is 104-3S516A still available?
104-3S516A is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026