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Technical Data Sheet
PartsTable / COMPONENT / MA4-528DISSUE2PC89
MA4-528DISSUE2PC89 ✓ 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,KEY is a the manufacturer industrial component. Key specifications include hole_diameter: 7.171 INCHES MINIMUM AND 7.206 INCHES MAXIMUM IN, outside_diameter: 8.375 INCHES MINIMUM AND 8.435 INCHES MAXIMUM IN, style_designator: KEY, material_thickness: 0.156 INCHES NOMINAL IN, external_key_quantity: 19, external_prebent_key_width: 0.605 INCHES MINIMUM AND 0.645 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-186-0988, 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
MA4-528DISSUE2PC89
NSN: 5310-00-186-0988
FSC: 5310
CAGE: 65090 — JERED BROWN BROS INC LIBERTY WORKS THE (USA)
SPECIFICATIONS
hole_diameter7.171 INCHES MINIMUM AND 7.206 INCHES MAXIMUM IN
outside_diameter8.375 INCHES MINIMUM AND 8.435 INCHES MAXIMUM IN
style_designatorKEY
material_thickness0.156 INCHES NOMINAL IN
external_key_quantity19
external_prebent_key_width0.605 INCHES MINIMUM AND 0.645 INCHES MAXIMUM IN
internal_prebent_key_width0.625 INCHES MINIMUM AND 0.715 INCHES MAXIMUM IN
internal_prebent_key_length0.313 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
overall_distance_including_keys9.438 INCHES NOMINAL IN
material_document_and_classification66 FED STD ALL MATERIAL RESPONSES OVERALL
NSN5310-00-186-0988
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MA4-528DISSUE2PC89 · 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 DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
MATERIAL: STEEL COMP 1005 OR STEEL COMP 1006 OR STEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1012 OR STEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1026 OR STEEL COMP 1527 OR STEEL COMP 1029 OR STEEL COMP 1030 OR STEEL COMP 1031 OR STEEL COMP 1033 OR STEEL COMP 1034 OR STEEL COMP 1035 OR STEEL COMP 1009 OR STEEL COMP 1023 OR STEEL COMP 1524 OR STEEL COMP 1025 OVERALL
•
STYLE DESIGNATOR: KEY
•
EXTERNAL KEY QUANTITY: 19
•
INTERNAL PREBENT KEY WIDTH: 0.625 INCHES MINIMUM AND 0.715 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 8.375 INCHES MINIMUM AND 8.435 INCHES MAXIMUM IN
•
OVERALL DISTANCE INCLUDING KEYS: 9.438 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.156 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
MATERIALSTEEL COMP 1005 OR STEEL COMP 1006 OR STEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1012 OR STEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1026 OR STEEL COMP 1527 OR STEEL COMP 1029 OR STEEL COMP 1030 OR STEEL COMP 1031 OR STEEL COMP 1033 OR STEEL COMP 1034 OR STEEL COMP 1035 OR STEEL COMP 1009 OR STEEL COMP 1023 OR STEEL COMP 1524 OR STEEL COMP 1025 OVERALL
STYLE DESIGNATORKEY
EXTERNAL KEY QUANTITY19
INTERNAL PREBENT KEY WIDTH0.625 INCHES MINIMUM AND 0.715 INCHES MAXIMUM IN
OUTSIDE DIAMETER8.375 INCHES MINIMUM AND 8.435 INCHES MAXIMUM IN
OVERALL DISTANCE INCLUDING KEYS9.438 INCHES NOMINAL IN
MATERIAL THICKNESS0.156 INCHES NOMINAL IN
INTERNAL PREBENT KEY LENGTH0.313 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
HOLE DIAMETER7.171 INCHES MINIMUM AND 7.206 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
P32BInterchangeable
interchangeable cross-reference
interchangeable
P52BInterchangeable
interchangeable cross-reference
interchangeable
W36Interchangeable
interchangeable cross-reference
interchangeable
A-A-59484Interchangeable
interchangeable cross-reference
interchangeable
3441-2310-8072Interchangeable
interchangeable cross-reference
interchangeable
58704Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MA4-528DISSUE2PC89?
MA4-528DISSUE2PC89 is a WASHER,KEY.
What parts can replace MA4-528DISSUE2PC89?
There are 20 known substitutes for MA4-528DISSUE2PC89: P32B, P52B, W36 and 17 more. Substitute compatibility should be verified for your specific system.
Is MA4-528DISSUE2PC89 still available?
MA4-528DISSUE2PC89 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