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Technical Data Sheet
PartsTable / COMPONENT / 004-002438
004-002438 ✓ 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 CORROSION RESISTING OVERALL, hole_diameter: 0.069 INCHES MINIMUM AND 0.069 INCHES MINIMUM AND 0.081 INCHES MAXIMUM0.081 INCHES MAXIMUM IN, hardness_rating: 35.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM45.0 ROCKWELL C MAXIMUM, outside_diameter: 0.144 INCHES MINIMUM AND 0.144 INCHES MINIMUM AND 0.156 INCHES MAXIMUM0.156 INCHES MAXIMUM IN, style_designator: SPLIT HELICAL-RIGHT HAND, surface_treatment: PASSIVATE 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 5310-01-084-5418, 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
004-002438
NSN: 5310-01-084-5418
FSC: 5310
CAGE: 26916 — NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN SYSTEMS CORP DIV MULTIPLE (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
hole_diameter0.069 INCHES MINIMUM AND 0.069 INCHES MINIMUM AND 0.081 INCHES MAXIMUM0.081 INCHES MAXIMUM IN
hardness_rating35.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM45.0 ROCKWELL C MAXIMUM
outside_diameter0.144 INCHES MINIMUM AND 0.144 INCHES MINIMUM AND 0.156 INCHES MAXIMUM0.156 INCHES MAXIMUM IN
style_designatorSPLIT HELICAL-RIGHT HAND
surface_treatmentPASSIVATE OVERALL
material_thickness0.020 INCHES MINIMUM AND 0.020 INCHES MINIMUM AND 0.026 INCHES MAXIMUM0.026 INCHES MAXIMUM IN
surface_treatment_document_and_classificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-084-5418
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 004-002438 · 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 CORROSION RESISTING OVERALL
•
STYLE DESIGNATOR: SPLIT HELICAL-RIGHT HAND
•
HOLE DIAMETER: 0.069 INCHES MINIMUM AND 0.069 INCHES MINIMUM AND 0.081 INCHES MAXIMUM0.081 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 0.144 INCHES MINIMUM AND 0.144 INCHES MINIMUM AND 0.156 INCHES MAXIMUM0.156 INCHES MAXIMUM IN
•
HARDNESS RATING: 35.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM45.0 ROCKWELL C MAXIMUM
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MATERIAL THICKNESS: 0.020 INCHES MINIMUM AND 0.020 INCHES MINIMUM AND 0.026 INCHES MAXIMUM0.026 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL CORROSION RESISTING OVERALL
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
HOLE DIAMETER0.069 INCHES MINIMUM AND 0.069 INCHES MINIMUM AND 0.081 INCHES MAXIMUM0.081 INCHES MAXIMUM IN
OUTSIDE DIAMETER0.144 INCHES MINIMUM AND 0.144 INCHES MINIMUM AND 0.156 INCHES MAXIMUM0.156 INCHES MAXIMUM IN
HARDNESS RATING35.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM45.0 ROCKWELL C MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
MATERIAL THICKNESS0.020 INCHES MINIMUM AND 0.020 INCHES MINIMUM AND 0.026 INCHES MAXIMUM0.026 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
Y61Interchangeable
interchangeable cross-reference
interchangeable
Y61RELAYInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 004-002438?
004-002438 is a WASHER,LOCK.
What parts can replace 004-002438?
There are 2 known substitutes for 004-002438: Y61, Y61RELAY. Substitute compatibility should be verified for your specific system.
What is the NSN for 004-002438?
004-002438 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-084-5418. 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