PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 373-5042-000
373-5042-000 ✓ 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: 0.256 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN, hardness_rating: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM, outside_diameter: 0.494 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN, style_designator: FLAT EXTERNAL TEETH, surface_treatment: CADMIUM AND CHROMATE OVERALL, material_thickness: 0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-209-0786, 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
373-5042-000
NSN: 5310-00-209-0786
FSC: 5310
CAGE: 13499 — ROCKWELL COLLINS, INC. DBA COLLINS AEROSPACE GOVERNMENT SYSTEMS DIV COLLINS AEROSPACE - GOVERNMENT SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL COMP 1050 OR STEEL COMP 1551 OR STEEL COMP 1552 OR STEEL COMP 1053 OR STEEL COMP 1055 OR STEEL COMP 1059 OR STEEL COMP 1060 OR STEEL COMP 1561 OR STEEL COMP 1064 OVERALL
hole_diameter0.256 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
hardness_rating40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
outside_diameter0.494 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
style_designatorFLAT EXTERNAL TEETH
surface_treatmentCADMIUM AND CHROMATE OVERALL
material_thickness0.023 INCHES MINIMUM AND 0.028 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
NSN5310-00-209-0786
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 373-5042-000 · 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: STEEL COMP 1050 OR STEEL COMP 1551 OR STEEL COMP 1552 OR STEEL COMP 1053 OR STEEL COMP 1055 OR STEEL COMP 1059 OR STEEL COMP 1060 OR STEEL COMP 1561 OR STEEL COMP 1064 OVERALL
•
OUTSIDE DIAMETER: 0.494 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
HOLE DIAMETER: 0.256 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN
•
HARDNESS RATING: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: FLAT EXTERNAL TEETH
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONW/S:AIRCRAFT, (AC-130H, MC-130H, EC-130E, HC-130); COMPRESSOR, RECIPROCATING M4; AIRBORNE MOBILE DIR AIR SPT CTL (2ID), (02M JUL83)(AN/UYQ-3A); AVIATION ENGINE TEST SYSTEMS (AETS); SUPPORT EQUIPMENT, B-1 AIRCRAFT; CENTRAL MESSAGE SWITCH, AN/TYC-39A; BOILE; MEDIUM MINE PROTECTED VEHICLE - MMPV; ARMORED MULTI-PURPOSE VEHICLE (AMPV); A4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE A
MATERIALSTEEL COMP 1050 OR STEEL COMP 1551 OR STEEL COMP 1552 OR STEEL COMP 1053 OR STEEL COMP 1055 OR STEEL COMP 1059 OR STEEL COMP 1060 OR STEEL COMP 1561 OR STEEL COMP 1064 OVERALL
OUTSIDE DIAMETER0.494 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
HOLE DIAMETER0.256 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
MATERIAL THICKNESS0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN
HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORFLAT EXTERNAL TEETH
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
490250Interchangeable
interchangeable cross-reference
interchangeable
407127Interchangeable
interchangeable cross-reference
interchangeable
114604Interchangeable
interchangeable cross-reference
interchangeable
0914105-2Interchangeable
interchangeable cross-reference
interchangeable
BEAX7FInterchangeable
interchangeable cross-reference
interchangeable
111400Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 373-5042-000?
373-5042-000 is a WASHER,LOCK.
What parts can replace 373-5042-000?
There are 30 known substitutes for 373-5042-000: 490250, 407127, 114604 and 27 more. Substitute compatibility should be verified for your specific system.
Is 373-5042-000 still available?
373-5042-000 is currently cancelled.
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Last verified: July 2026