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PartsTable / COMPONENT / 53F3N
53F3N ✓ 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 material: STEEL OVERALL, hole_diameter: 0.168 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN, outside_diameter: 0.325 INCHES MINIMUM AND 0.336 INCHES MAXIMUM IN, style_designator: FLAT INTERNAL TEETH, surface_treatment: NICKEL OVERALL, material_thickness: 0.020 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-193-7491, 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
53F3N
NSN: 5310-00-193-7491
FSC: 5310
CAGE: 13413 — CONNER INDUSTRIES (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.168 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN
outside_diameter0.325 INCHES MINIMUM AND 0.336 INCHES MAXIMUM IN
style_designatorFLAT INTERNAL TEETH
surface_treatmentNICKEL OVERALL
material_thickness0.020 INCHES NOMINAL IN
NSN5310-00-193-7491
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 53F3N · 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
•
MATERIAL: STEEL OVERALL
•
MATERIAL THICKNESS: 0.020 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.168 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 0.325 INCHES MINIMUM AND 0.336 INCHES MAXIMUM IN
•
SURFACE TREATMENT: NICKEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORFLAT INTERNAL TEETH
MATERIALSTEEL OVERALL
MATERIAL THICKNESS0.020 INCHES NOMINAL IN
HOLE DIAMETER0.168 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN
OUTSIDE DIAMETER0.325 INCHES MINIMUM AND 0.336 INCHES MAXIMUM IN
SURFACE TREATMENTNICKEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
32030Interchangeable
interchangeable cross-reference
interchangeable
L-4-18-9-MInterchangeable
interchangeable cross-reference
interchangeable
433-1792Interchangeable
interchangeable cross-reference
interchangeable
418212-40Interchangeable
interchangeable cross-reference
interchangeable
SC5340-0255-2Interchangeable
interchangeable cross-reference
interchangeable
J644HInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 53F3N?
53F3N is a WASHER,LOCK.
What parts can replace 53F3N?
There are 8 known substitutes for 53F3N: 32030, L-4-18-9-M, 433-1792 and 5 more. Substitute compatibility should be verified for your specific system.
Is 53F3N still available?
53F3N 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