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Technical Data Sheet
PartsTable / COMPONENT / RFM20A06
RFM20A06 ✓ 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 NUT,SELF-LOCKING,PLATE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: PLATE, nut_height: 0.171 INCHES MAXIMUM IN, nut_length: 0.682 INCHES MAXIMUM IN, lubrication: DRY FILM LUBRICANT, plate_width: 0.290 INCHES MINIMUM AND 0.357 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-781-9493, 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
RFM20A06
NSN: 5310-00-781-9493
FSC: 5310
CAGE: 52828 — REPUBLIC FASTENER MFG. CORP. DBA ARCONIC FASTENING SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_stylePLATE
nut_height0.171 INCHES MAXIMUM IN
nut_length0.682 INCHES MAXIMUM IN
lubricationDRY FILM LUBRICANT
plate_width0.290 INCHES MINIMUM AND 0.357 INCHES MAXIMUM IN
temp_rating450.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNJC
hardness_rating49.0 ROCKWELL C MAXIMUM
locking_featurePREVAILING TORQUE ALL METAL DESIGN
plate_thickness0.140 INCHES MAXIMUM IN
NSN5310-00-781-9493
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: RFM20A06 · 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
•
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG LENGTH: 0.435 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
•
THREAD QUANTITY PER INCH: 32
•
MOUNTING HOLE ARRANGEMENT STYLE: 2 HOLES
•
LUBRICATION: DRY FILM LUBRICANT
•
NUT STYLE: PLATE
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
•
FEATURES PROVIDED: FLOATING NUT
•
HARDNESS RATING: 49.0 ROCKWELL C MAXIMUM
TECHNICAL CHARACTERISTICS (FLIS)
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG LENGTH0.435 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
THREAD QUANTITY PER INCH32
MOUNTING HOLE ARRANGEMENT STYLE2 HOLES
LUBRICATIONDRY FILM LUBRICANT
NUT STYLEPLATE
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
FEATURES PROVIDEDFLOATING NUT
HARDNESS RATING49.0 ROCKWELL C MAXIMUM
NUT HEIGHT0.171 INCHES MAXIMUM IN
PLATE THICKNESS0.140 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
40-272-649-02Interchangeable
interchangeable cross-reference
interchangeable
563444-2Interchangeable
interchangeable cross-reference
interchangeable
440637Interchangeable
interchangeable cross-reference
interchangeable
220045Interchangeable
interchangeable cross-reference
interchangeable
MS21075L06Interchangeable
interchangeable cross-reference
interchangeable
MF1000-06T2Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is RFM20A06?
RFM20A06 is a NUT,SELF-LOCKING,PLATE.
What parts can replace RFM20A06?
There are 12 known substitutes for RFM20A06: 40-272-649-02, 563444-2, 440637 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for RFM20A06?
RFM20A06 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-781-9493. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026