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PartsTable / COMPONENT / M21143/2-47
M21143/2-47 ✓ 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 M21143/2-47 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-01-285-7142, 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
M21143/2-47
NSN: 5315-01-285-7142
FSC: 5315
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM21143/2-47
NSN5315-01-285-7142
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: M21143/2-47 · 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 DOCUMENT AND CLASSIFICATION: ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
PIN OVERALL LENGTH: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL: STEEL COMP 303 OVERALL
•
FIRST END STYLE: SQUARE
•
PIN OVERALL DIAMETER: 0.0936 INCHES MINIMUM AND 0.0938 INCHES MAXIMUM IN
•
SURFACE FINISH: 16.0 MICROINCHES OUTSIDE DIAMETER
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
PIN OVERALL LENGTH0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
MATERIALSTEEL COMP 303 OVERALL
FIRST END STYLESQUARE
PIN OVERALL DIAMETER0.0936 INCHES MINIMUM AND 0.0938 INCHES MAXIMUM IN
SURFACE FINISH16.0 MICROINCHES OUTSIDE DIAMETER
SURFACE TREATMENTPASSIVATE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 31
PD5AARA19Interchangeable
interchangeable cross-reference
interchangeable
50D13133Interchangeable
interchangeable cross-reference
interchangeable
50D12133Interchangeable
interchangeable cross-reference
interchangeable
31071Interchangeable
interchangeable cross-reference
interchangeable
M21143/2-27Interchangeable
interchangeable cross-reference
interchangeable
L2088498-11Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M21143/2-47?
M21143/2-47 is a M21143/2-47.
What parts can replace M21143/2-47?
There are 31 known substitutes for M21143/2-47: PD5AARA19, 50D13133, 50D12133 and 28 more. Substitute compatibility should be verified for your specific system.
Is M21143/2-47 still available?
M21143/2-47 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