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2MP51 ✓ 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 WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.382 INCHES MINIMUM AND 0.393 INCHES MAXIMUM IN, outside_diameter: 0.688 INCHES NOMINAL IN, style_designator: SPLIT HELICAL-RIGHT HAND, surface_treatment: CADMIUM OVERALL, material_thickness: 0.094 INCHES NOMINAL 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 5310-00-687-7199, 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
2MP51
NSN: 5310-00-687-7199
FSC: 5310
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.382 INCHES MINIMUM AND 0.393 INCHES MAXIMUM IN
outside_diameter0.688 INCHES NOMINAL IN
style_designatorSPLIT HELICAL-RIGHT HAND
surface_treatmentCADMIUM OVERALL
material_thickness0.094 INCHES NOMINAL IN
NSN5310-00-687-7199
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2MP51 · 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
•
HOLE DIAMETER: 0.382 INCHES MINIMUM AND 0.393 INCHES MAXIMUM IN
•
SURFACE TREATMENT: CADMIUM OVERALL
•
STYLE DESIGNATOR: SPLIT HELICAL-RIGHT HAND
•
MATERIAL THICKNESS: 0.094 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
OUTSIDE DIAMETER: 0.688 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER0.382 INCHES MINIMUM AND 0.393 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM OVERALL
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
MATERIAL THICKNESS0.094 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
OUTSIDE DIAMETER0.688 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
2-1612Interchangeable
interchangeable cross-reference
interchangeable
G330105S1Interchangeable
interchangeable cross-reference
interchangeable
3087Interchangeable
interchangeable cross-reference
interchangeable
1539837Interchangeable
interchangeable cross-reference
interchangeable
261671Interchangeable
interchangeable cross-reference
interchangeable
60548Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2MP51?
2MP51 is a WASHER,LOCK.
What parts can replace 2MP51?
There are 15 known substitutes for 2MP51: 2-1612, G330105S1, 3087 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2MP51?
2MP51 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-687-7199. 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