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NAS1640-0 — Technical Data Sheet

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— · 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: 0.062 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN, outside_diameter: 0.122 INCHES MAXIMUM IN, style_designator: SPLIT HELICAL-RIGHT HAND, surface_treatment: PASSIVATE OVERALL, material_thickness: 0.022 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System under NSN 5310-00-676-8061, 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
NAS1640-0
NSN: 5310-00-676-8061
FSC: 5310
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OVERALL
hole_diameter0.062 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
outside_diameter0.122 INCHES MAXIMUM IN
style_designatorSPLIT HELICAL-RIGHT HAND
surface_treatmentPASSIVATE OVERALL
material_thickness0.022 INCHES NOMINAL IN
material_document_and_classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-676-8061
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: NAS1640-0 · 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
•
STYLE DESIGNATOR: SPLIT HELICAL-RIGHT HAND
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL THICKNESS: 0.022 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 302 OVERALL
•
HOLE DIAMETER: 0.062 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 0.122 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL THICKNESS0.022 INCHES NOMINAL IN
MATERIALSTEEL COMP 302 OVERALL
HOLE DIAMETER0.062 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
OUTSIDE DIAMETER0.122 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
66-1C601000InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
0H31C601000InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
601000InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
14-365InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
NNN-S-001356InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
14-365FInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NAS1640-0?
NAS1640-0 is a WASHER,LOCK.
What parts can replace NAS1640-0?
There are 19 known substitutes for NAS1640-0: 66-1C601000, 0H31C601000, 601000 and 16 more. Substitute compatibility should be verified for your specific system.
Is NAS1640-0 still available?
NAS1640-0 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: October 2026