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LW598 ✓ 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 color: BLACK OVERALL, material: STEEL COMP 1050 OR STEEL COMP 1064 OVERALL, hole_diameter: 0.472 INCHES MINIMUM AND 0.480 INCHES MAXIMUM IN, hardness_rating: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM, outside_diameter: 0.593 INCHES MINIMUM AND 0.607 INCHES MAXIMUM IN, style_designator: FLAT INTERNAL TEETH. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-197-4511, 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
LW598
NSN: 5310-00-197-4511
FSC: 5310
CAGE: 80249 — BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION INC. (USA)
SPECIFICATIONS
colorBLACK OVERALL
materialSTEEL COMP 1050 OR STEEL COMP 1064 OVERALL
hole_diameter0.472 INCHES MINIMUM AND 0.480 INCHES MAXIMUM IN
hardness_rating40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
outside_diameter0.593 INCHES MINIMUM AND 0.607 INCHES MAXIMUM IN
style_designatorFLAT INTERNAL TEETH
surface_treatmentCADMIUM AND CHROMATE OVERALL
material_thickness0.016 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
supplementary_featuresFOR MTG ELECT. COMP APPL 76374 CIRCUIT BREAKERS MP-1500-052/700-001/1536-010 SERIES,BLACK FINISH
specification/standard_data88044-AN936/CANCELED/ GOVERNMENT STANDARD
material_document_and_classification66 FED STD ALL MATERIAL RESPONSES OVERALL
surface_treatment_document_and_classificationQQ-P-416,TYPE 2,CLASS 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
NSN5310-00-197-4511
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: LW598 · 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 THICKNESS: 0.016 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
•
SPECIFICATION/STANDARD DATA: 88044-AN936/CANCELED/ GOVERNMENT STANDARD
•
MATERIAL: STEEL COMP 1050 OR STEEL COMP 1064 OVERALL
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
SUPPLEMENTARY FEATURES: FOR MTG ELECT. COMP APPL 76374 CIRCUIT BREAKERS MP-1500-052/700-001/1536-010 SERIES,BLACK FINISH
•
OUTSIDE DIAMETER: 0.593 INCHES MINIMUM AND 0.607 INCHES MAXIMUM IN
•
HARDNESS RATING: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE 2,CLASS 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL THICKNESS0.016 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
SPECIFICATION/STANDARD DATA88044-AN936/CANCELED/ GOVERNMENT STANDARD
MATERIALSTEEL COMP 1050 OR STEEL COMP 1064 OVERALL
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
SUPPLEMENTARY FEATURESFOR MTG ELECT. COMP APPL 76374 CIRCUIT BREAKERS MP-1500-052/700-001/1536-010 SERIES,BLACK FINISH
OUTSIDE DIAMETER0.593 INCHES MINIMUM AND 0.607 INCHES MAXIMUM IN
HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2,CLASS 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
COLORBLACK OVERALL
STYLE DESIGNATORFLAT INTERNAL TEETH
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
373-0083-000Interchangeable
interchangeable cross-reference
interchangeable
9166152Interchangeable
interchangeable cross-reference
interchangeable
FFW100CInterchangeable
interchangeable cross-reference
interchangeable
5310PL1737210Interchangeable
interchangeable cross-reference
interchangeable
8176098Interchangeable
interchangeable cross-reference
interchangeable
5310PL0738202Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is LW598?
LW598 is a WASHER,LOCK.
What parts can replace LW598?
There are 10 known substitutes for LW598: 373-0083-000, 9166152, FFW100C and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for LW598?
LW598 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-197-4511. 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