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Technical Data Sheet
PartsTable / COMPONENT / 10-20395
10-20395 ✓ 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 OVERALL, hole_diameter: 0.319 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN, hardness_rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM, outside_diameter: 0.575 INCHES NOMINAL IN, style_designator: SPLIT HELICAL-RIGHT HAND, surface_treatment: CADMIUM OR ZINC OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-012-0379, 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
10-20395
NSN: 5310-00-012-0379
FSC: 5310
CAGE: 28839 — TELEDYNE INDUSTRIES INC TELEDYNE POWER SYSTEMS DIV (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.319 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN
hardness_rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
outside_diameter0.575 INCHES NOMINAL IN
style_designatorSPLIT HELICAL-RIGHT HAND
surface_treatmentCADMIUM OR ZINC OVERALL
material_thickness0.056 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
nondefinitive_spec/std_data1 STYLE AND A CLASS
material_document_and_classificationFED STD 66,AISI C1060 THRU C1080 OR SAE 1060 THRU 1080 FED STD ALL MATERIAL RESPONSES OVERALL
surface_treatment_document_and_classificationQQ-P-416 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325 FED SPEC 2ND TREATMENT RESPONSE OVERALL
NSN5310-00-012-0379
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 10-20395 · 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
•
NONDEFINITIVE SPEC/STD DATA: 1 STYLE AND A CLASS
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: SPLIT HELICAL-RIGHT HAND
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325 FED SPEC 2ND TREATMENT RESPONSE OVERALL
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
•
OUTSIDE DIAMETER: 0.575 INCHES NOMINAL IN
•
HARDNESS RATING: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
•
HOLE DIAMETER: 0.319 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATA1 STYLE AND A CLASS
MATERIALSTEEL OVERALL
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325 FED SPEC 2ND TREATMENT RESPONSE OVERALL
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
OUTSIDE DIAMETER0.575 INCHES NOMINAL IN
HARDNESS RATING45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
HOLE DIAMETER0.319 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN
MATERIAL THICKNESS0.056 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66,AISI C1060 THRU C1080 OR SAE 1060 THRU 1080 FED STD ALL MATERIAL RESPONSES OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
496DInterchangeable
interchangeable cross-reference
interchangeable
607R36INInterchangeable
Rule,machinist's
interchangeable
56436Interchangeable
Rule,machinist's
interchangeable
702-036Interchangeable
Rule,machinist's
interchangeable
5310PL0823235Interchangeable
interchangeable cross-reference
interchangeable
2254388Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 10-20395?
10-20395 is a WASHER,LOCK.
What parts can replace 10-20395?
There are 14 known substitutes for 10-20395: 496D, 607R36IN, 56436 and 11 more. Substitute compatibility should be verified for your specific system.
Is 10-20395 still available?
10-20395 is currently cancelled.
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Last verified: July 2026