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MP128 ✓ 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 BUSHING,SLEEVE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, first_end_style: SQUARE, pin_overall_length: 1.438 INCHES NOMINAL IN, pin_overall_diameter: 0.1855 INCHES MINIMUM AND 0.1875 INCHES MAXIMUM IN, material_document_and_classification: MIL-B-895 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL, second_end_relationship_with_first_end: IDENTICAL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-221-7229, 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
MP128
NSN: 5315-00-221-7229
FSC: 5315
CAGE: 24617 — GENERAL MOTORS CORP (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
first_end_styleSQUARE
pin_overall_length1.438 INCHES NOMINAL IN
pin_overall_diameter0.1855 INCHES MINIMUM AND 0.1875 INCHES MAXIMUM IN
material_document_and_classificationMIL-B-895 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
second_end_relationship_with_first_endIDENTICAL
NSN5315-00-221-7229
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MP128 · 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
•
MATERIAL: COPPER ALLOY OVERALL
•
FIRST END STYLE: SQUARE
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
PIN OVERALL DIAMETER: 0.1855 INCHES MINIMUM AND 0.1875 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-B-895 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
PIN OVERALL LENGTH: 1.438 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER ALLOY OVERALL
FIRST END STYLESQUARE
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
PIN OVERALL DIAMETER0.1855 INCHES MINIMUM AND 0.1875 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-B-895 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
PIN OVERALL LENGTH1.438 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
WW-V-35Interchangeable
interchangeable cross-reference
interchangeable
T-580-1 1/2Interchangeable
interchangeable cross-reference
interchangeable
21-161Interchangeable
interchangeable cross-reference
interchangeable
JH2116-1Interchangeable
interchangeable cross-reference
interchangeable
ASTM A733Interchangeable
interchangeable cross-reference
interchangeable
W138326T20Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MP128?
MP128 is a BUSHING,SLEEVE.
What parts can replace MP128?
There are 17 known substitutes for MP128: WW-V-35, T-580-1 1/2, 21-161 and 14 more. Substitute compatibility should be verified for your specific system.
Is MP128 still available?
MP128 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026