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PartsTable / COMPONENT / MF19651-4
MF19651-4 ✓ 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,PLAIN,PLATE is a the manufacturer industrial component. Key specifications include material: IRON ALLOY 660 OVERALL, nut_style: PLATE, nut_height: 0.281 INCHES MAXIMUM IN, nut_length: 0.801 INCHES MAXIMUM IN, plate_width: 0.431 INCHES MAXIMUM IN, temp_rating: 800.0 FAHRENHEIT NOMINAL DEGF. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-485-9620, 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
MF19651-4
NSN: 5310-00-485-9620
FSC: 5310
CAGE: 15653 — HOWMET GLOBAL FASTENING SYSTEMS INC (USA)
SPECIFICATIONS
materialIRON ALLOY 660 OVERALL
nut_stylePLATE
nut_height0.281 INCHES MAXIMUM IN
nut_length0.801 INCHES MAXIMUM IN
plate_width0.431 INCHES MAXIMUM IN
temp_rating800.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNF
plate_thickness0.125 INCHES NOMINAL IN
thread_directionRIGHT-HAND
features_providedFLOATING NUT
surface_treatmentPASSIVATE OVERALL
NSN5310-00-485-9620
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MF19651-4 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
NUT LENGTH: 0.801 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
MOUNTING HOLE ARRANGEMENT STYLE: 2 HOLES
•
PLATE THICKNESS: 0.125 INCHES NOMINAL IN
•
NUT STYLE: PLATE
•
PLATE WIDTH: 0.431 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NUT LENGTH0.801 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
NOMINAL THREAD SIZE0.250 INCHES IN
MOUNTING HOLE ARRANGEMENT STYLE2 HOLES
PLATE THICKNESS0.125 INCHES NOMINAL IN
NUT STYLEPLATE
PLATE WIDTH0.431 INCHES MAXIMUM IN
THREAD SERIESUNF
MOUNTING HOLE DIAMETER0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
0007426Interchangeable
interchangeable cross-reference
interchangeable
71780-27Interchangeable
interchangeable cross-reference
interchangeable
5M00007426Interchangeable
interchangeable cross-reference
interchangeable
457-5573Interchangeable
Same NIIN cross-reference
interchangeable
G470090-3Interchangeable
Same NIIN cross-reference
interchangeable
MA13700E-048NLInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MF19651-4?
MF19651-4 is a NUT,PLAIN,PLATE.
What parts can replace MF19651-4?
There are 6 known substitutes for MF19651-4: 0007426, 71780-27, 5M00007426 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MF19651-4?
MF19651-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-485-9620. 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