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PartsTable / COMPONENT / 3163-40-25S
3163-40-25S ✓ 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 302 OVERALL, hole_diameter: 0.101 INCHES MINIMUM AND 0.107 INCHES MAXIMUM IN, outside_diameter: 0.198 INCHES MAXIMUM IN, style_designator: SPLIT HELICAL-RIGHT HAND, surface_treatment: PASSIVATE OVERALL, material_thickness: 0.025 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-603-0331, 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
3163-40-25S
NSN: 5310-00-603-0331
FSC: 5310
CAGE: 09772 — WEST COAST LOCKWASHER CO., INC. DBA WEST COAST LOCKWASHER CO INC DIV WEST COAST LOCKWASHER (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OVERALL
hole_diameter0.101 INCHES MINIMUM AND 0.107 INCHES MAXIMUM IN
outside_diameter0.198 INCHES MAXIMUM IN
style_designatorSPLIT HELICAL-RIGHT HAND
surface_treatmentPASSIVATE OVERALL
material_thickness0.025 INCHES NOMINAL IN
material_document_and_classificationAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-603-0331
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3163-40-25S · 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
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MATERIAL: STEEL COMP 302 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL THICKNESS: 0.025 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.101 INCHES MINIMUM AND 0.107 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 0.198 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SPLIT HELICAL-RIGHT HAND
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALSTEEL COMP 302 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL THICKNESS0.025 INCHES NOMINAL IN
HOLE DIAMETER0.101 INCHES MINIMUM AND 0.107 INCHES MAXIMUM IN
OUTSIDE DIAMETER0.198 INCHES MAXIMUM IN
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
40-13812Interchangeable
interchangeable cross-reference
interchangeable
03-0201-6167Interchangeable
interchangeable cross-reference
interchangeable
SM-B-573292Interchangeable
interchangeable cross-reference
interchangeable
107114Interchangeable
interchangeable cross-reference
interchangeable
107-68Interchangeable
interchangeable cross-reference
interchangeable
236-1015PT3Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3163-40-25S?
3163-40-25S is a WASHER,LOCK.
What parts can replace 3163-40-25S?
There are 7 known substitutes for 3163-40-25S: 40-13812, 03-0201-6167, SM-B-573292 and 4 more. Substitute compatibility should be verified for your specific system.
Is 3163-40-25S still available?
3163-40-25S 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