PartsTable
Technical Data Sheet
MK4031-3 ✓ 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 end_item_identification: KC-46A TANKER A, part_name_assigned_by_controlling_agency: NUT, reference_number_differentiating_characteristics: ITEM IS FAA CERTIFIED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-345-3763, 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
MK4031-3
NSN: 5310-01-345-3763
FSC: 5310
CAGE: 15653 — HOWMET GLOBAL FASTENING SYSTEMS INC (USA)
SPECIFICATIONS
end_item_identificationKC-46A TANKER A
part_name_assigned_by_controlling_agencyNUT
reference_number_differentiating_characteristicsITEM IS FAA CERTIFIED
NSN5310-01-345-3763
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MK4031-3 · 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
COUNTERBORE DIAMETER: 0.194 INCHES MINIMUM FIRST END IN
NUT HEIGHT: 0.220 INCHES MAXIMUM IN
PRECIOUS MATERIAL: SILVER
NUT STYLE: PLATE
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
SURFACE TREATMENT: SILVER OVERALL
HARDNESS RATING: 32.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM
NUT MOUNTING PROVISION: STRAIGHT HOLES
TECHNICAL CHARACTERISTICS (FLIS)
COUNTERBORE DIAMETER0.194 INCHES MINIMUM FIRST END IN
NUT HEIGHT0.220 INCHES MAXIMUM IN
PRECIOUS MATERIALSILVER
NUT STYLEPLATE
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
SURFACE TREATMENTSILVER OVERALL
HARDNESS RATING32.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM
NUT MOUNTING PROVISIONSTRAIGHT HOLES
PLATE THICKNESS0.030 INCHES MINIMUM AND 0.047 INCHES MAXIMUM IN
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG WIDTH0.217 INCHES MINIMUM AND 0.221 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
99-617-0245Interchangeable
interchangeable cross-reference
interchangeable
U760206Interchangeable
interchangeable cross-reference
interchangeable
694142Interchangeable
interchangeable cross-reference
interchangeable
694141Interchangeable
interchangeable cross-reference
interchangeable
LHTA575M2860-02Interchangeable
interchangeable cross-reference
interchangeable
EMK4031Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MK4031-3?
MK4031-3 is a NUT,SELF-LOCKING,PLATE.
What parts can replace MK4031-3?
There are 7 known substitutes for MK4031-3: 99-617-0245, U760206, 694142 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MK4031-3?
MK4031-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-345-3763. This indicates validated use in U.S. government and defense supply chains.
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