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MCRF220C3M4 — NUT,SELF-LOCKING,PLATE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

MCRF220C3M4: NUT,SELF-LOCKING,PLATE.

The NUT,SELF-LOCKING,PLATE is a the manufacturer industrial component. Key specifications include material: IRON ALLOY 660 OVERALL, nut_style: PLATE, nut_height: 0.438 INCHES MAXIMUM IN, nut_length: 0.970 INCHES MAXIMUM IN, lubrication: DRY FILM LUBRICANT, plate_width: 0.421 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-028-3589, 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
MCRF220C3M4
NSN: 5310-01-028-3589
FSC: 5310 — Nuts and Washers
CAGE: 52828 — REPUBLIC FASTENER MFG. CORP. DBA ARCONIC FASTENING SYSTEMS (USA)
SPECIFICATIONS
materialIRON ALLOY 660 OVERALL
nut_stylePLATE
nut_height0.438 INCHES MAXIMUM IN
nut_length0.970 INCHES MAXIMUM IN
lubricationDRY FILM LUBRICANT
plate_width0.421 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
locking_featurePREVAILING TORQUE ALL METAL DESIGN
plate_thickness0.035 INCHES MAXIMUM IN
special_featuresCOLOR YELLOW
thread_directionRIGHT-HAND
NSN5310-01-028-3589
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MCRF220C3M4 · 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
•
LUBRICATION: DRY FILM LUBRICANT
•
PLATE THICKNESS: 0.035 INCHES MAXIMUM IN
•
NUT LENGTH: 0.970 INCHES MAXIMUM IN
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
•
PLATE WIDTH: 0.421 INCHES MAXIMUM IN
•
MOUNTING HOLE ARRANGEMENT STYLE: 2 HOLES
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5525 ASSN STD ALL MATERIAL RESPONSES OR AMS 5732 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
MOUNTING HOLE DIAMETER: 0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
LUBRICATIONDRY FILM LUBRICANT
PLATE THICKNESS0.035 INCHES MAXIMUM IN
NUT LENGTH0.970 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
PLATE WIDTH0.421 INCHES MAXIMUM IN
MOUNTING HOLE ARRANGEMENT STYLE2 HOLES
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5525 ASSN STD ALL MATERIAL RESPONSES OR AMS 5732 ASSN STD ALL MATERIAL RESPONSES OVERALL
MOUNTING HOLE DIAMETER0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN
NUT COUNTERBORE DEPTH0.250 INCHES MINIMUM NUT IN
FEATURES PROVIDEDFLOATING NUT
SUBSTITUTES & CROSS-REFERENCES 6
NGN502DK3-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
NS202211-02-04Reference document
Same NSN cross-reference
Reference document — Secondary reference
ST3M719C3M4Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
10122001Reference document
Same NSN cross-reference
Reference document — Informative reference only
F12090-4-3Reference document
Same NSN cross-reference
Reference document — Secondary reference
NS202211-02-4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MCRF220C3M4?
MCRF220C3M4 is a NUT,SELF-LOCKING,PLATE.
What parts can replace MCRF220C3M4?
There are 6 known substitutes for MCRF220C3M4: NGN502DK3-4, NS202211-02-04, ST3M719C3M4 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MCRF220C3M4?
MCRF220C3M4 is cataloged in the U.S. Government catalog under NSN 5310-01-028-3589. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.