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PartsTable / COMPONENT / 1904376
1904376 ✓ 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: 0.167 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN, outside_diameter: 0.375 INCHES MAXIMUM IN, style_designator: SPLIT HELICAL-RIGHT HAND, surface_treatment: CADMIUM OVERALL, material_thickness: 0.057 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN, material_document_and_classification: 66 FED STD ALL MATERIAL RESPONSES OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-641-9392, 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
1904376
NSN: 5310-00-641-9392
FSC: 5310
CAGE: 16764 — GENERAL MOTORS CORP DELCO REMY DIV (USA)
SPECIFICATIONS
hole_diameter0.167 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN
outside_diameter0.375 INCHES MAXIMUM IN
style_designatorSPLIT HELICAL-RIGHT HAND
surface_treatmentCADMIUM OVERALL
material_thickness0.057 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
material_document_and_classification66 FED STD ALL MATERIAL RESPONSES OVERALL
surface_treatment_document_and_classificationQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-641-9392
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1904376 · 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
•
OUTSIDE DIAMETER: 0.373 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.168 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
SURFACE TREATMENT: CADMIUM OVERALL
•
MATERIAL THICKNESS: 0.003 INCHES MINIMUM AND 0.006 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SPLIT HELICAL-RIGHT HAND
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER0.373 INCHES NOMINAL IN
HOLE DIAMETER0.168 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
SURFACE TREATMENTCADMIUM OVERALL
MATERIAL THICKNESS0.003 INCHES MINIMUM AND 0.006 INCHES MAXIMUM IN
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
5310008093365Interchangeable
interchangeable cross-reference
interchangeable
191407Interchangeable
interchangeable cross-reference
interchangeable
FFW84Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1904376?
1904376 is a WASHER,LOCK.
What parts can replace 1904376?
There are 3 known substitutes for 1904376: 5310008093365, 191407, FFW84. Substitute compatibility should be verified for your specific system.
What is the NSN for 1904376?
1904376 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-641-9392. 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