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PartsTable / COMPONENT / NASM20066
NASM20066 ✓ 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 KEY,MACHINE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY K-500 OVERALL, overall_width: 0.125 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN, overall_height: 0.125 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN, overall_length: 1.750 INCHES NOMINAL IN, shear_strength: 90000 SINGLE POUNDS PER SQUARE INCH, hardness_rating: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-728-9394, 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
NASM20066
NSN: 5315-00-728-9394
FSC: 5315
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)
SPECIFICATIONS
materialNICKEL ALLOY K-500 OVERALL
overall_width0.125 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN
overall_height0.125 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN
overall_length1.750 INCHES NOMINAL IN
shear_strength90000 SINGLE POUNDS PER SQUARE INCH
hardness_rating40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
style_designatorPLAIN
surface_treatmentPASSIVATE OVERALL
starting_edge_shapeSTRAIGHT
nondefinitive_spec/std_data2 TYPE AND 1 STYLE AND A GRADE
material_document_and_classification66 FED STD ALL MATERIAL RESPONSES OVERALL
surface_treatment_document_and_classificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5315-00-728-9394
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: NASM20066 · 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: PLAIN
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66,400 SERIES FED STD SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND 1 STYLE AND A GRADE
•
STARTING EDGE SHAPE: STRAIGHT
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORPLAIN
MATERIAL DOCUMENT AND CLASSIFICATION66,400 SERIES FED STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL CORROSION RESISTING OVERALL
OVERALL HEIGHT0.0625 INCHES MINIMUM AND 0.0635 INCHES MAXIMUM IN
NONDEFINITIVE SPEC/STD DATA2 TYPE AND 1 STYLE AND A GRADE
STARTING EDGE SHAPESTRAIGHT
OVERALL LENGTH0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
OVERALL WIDTH0.0625 INCHES MINIMUM AND 0.0635 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
MS20066-544Interchangeable
interchangeable cross-reference
interchangeable
NASM20066Interchangeable
interchangeable cross-reference
interchangeable
55-22081 PART 2Interchangeable
interchangeable cross-reference
interchangeable
MB423Interchangeable
interchangeable cross-reference
interchangeable
MS20066-405Interchangeable
interchangeable cross-reference
interchangeable
OO-K-220Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NASM20066?
NASM20066 is a KEY,MACHINE.
What parts can replace NASM20066?
There are 10 known substitutes for NASM20066: MS20066-544, NASM20066, 55-22081 PART 2 and 7 more. Substitute compatibility should be verified for your specific system.
Is NASM20066 still available?
NASM20066 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: July 2026