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Technical Data Sheet
PartsTable / COMPONENT / 633245PC18
633245PC18 ✓ 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 COMP 1 OVERALL, hole_diameter: 0.167 INCHES MINIMUM AND 0.177 INCHES MAXIMUM IN, outside_diameter: 0.336 INCHES NOMINAL IN, style_designator: FLAT INTERNAL TEETH, surface_treatment: PASSIVATE OVERALL, material_thickness: 0.020 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-274-8692, 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
633245PC18
NSN: 5310-00-274-8692
FSC: 5310
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL COMP 1 OVERALL
hole_diameter0.167 INCHES MINIMUM AND 0.177 INCHES MAXIMUM IN
outside_diameter0.336 INCHES NOMINAL IN
style_designatorFLAT INTERNAL TEETH
surface_treatmentPASSIVATE OVERALL
material_thickness0.020 INCHES NOMINAL IN
nondefinitive_spec/std_dataA TYPE
material_document_and_classificationMIL-S-854 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-274-8692
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 633245PC18 · 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 DOCUMENT AND CLASSIFICATION: MIL-S-854 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
STYLE DESIGNATOR: FLAT INTERNAL TEETH
•
OUTSIDE DIAMETER: 0.336 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.167 INCHES MINIMUM AND 0.177 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.020 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
NONDEFINITIVE SPEC/STD DATA: A TYPE
•
MATERIAL: STEEL COMP 1 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-854 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
STYLE DESIGNATORFLAT INTERNAL TEETH
OUTSIDE DIAMETER0.336 INCHES NOMINAL IN
HOLE DIAMETER0.167 INCHES MINIMUM AND 0.177 INCHES MAXIMUM IN
MATERIAL THICKNESS0.020 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
NONDEFINITIVE SPEC/STD DATAA TYPE
MATERIALSTEEL COMP 1 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
5310PL0578660Interchangeable
interchangeable cross-reference
interchangeable
373-0003-000Interchangeable
interchangeable cross-reference
interchangeable
100354-6Interchangeable
interchangeable cross-reference
interchangeable
373-003-0Interchangeable
interchangeable cross-reference
interchangeable
636104-000Interchangeable
Same NIIN cross-reference
interchangeable
MILW6986TYPEAInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 633245PC18?
633245PC18 is a WASHER,LOCK.
What parts can replace 633245PC18?
There are 11 known substitutes for 633245PC18: 5310PL0578660, 373-0003-000, 100354-6 and 8 more. Substitute compatibility should be verified for your specific system.
Is 633245PC18 still available?
633245PC18 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