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MILW6986 ✓ 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: COPPER ALLOY OVERALL, hole_diameter: 0.256 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN, outside_diameter: 0.466 INCHES MINIMUM AND 0.478 INCHES MAXIMUM IN, style_designator: FLAT INTERNAL TEETH, material_thickness: 0.023 INCHES MINIMUM AND 0.027 INCHES MAXIMUM IN, nondefinitive_spec/std_data: 1 TYPE AND A GRADE AND 1 STYLE AND 3 COMPOSITION. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-011-5551, 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
MILW6986
NSN: 5310-00-011-5551
FSC: 5310
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
hole_diameter0.256 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
outside_diameter0.466 INCHES MINIMUM AND 0.478 INCHES MAXIMUM IN
style_designatorFLAT INTERNAL TEETH
material_thickness0.023 INCHES MINIMUM AND 0.027 INCHES MAXIMUM IN
nondefinitive_spec/std_data1 TYPE AND A GRADE AND 1 STYLE AND 3 COMPOSITION
specification/standard_data81348-FF-W-100 GOVERNMENT SPECIFICATION AND 88044-AN936/CANCELED GOVERNMENT STANDARD
departure_from_cited_designatorAS MODIFIED BY OUTSIDE DIAMETER AND MATERIAL THICKNESS
NSN5310-00-011-5551
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MILW6986 · 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
•
OUTSIDE DIAMETER: 0.867 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: FLAT INTERNAL TEETH
•
MATERIAL THICKNESS: 0.037 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER0.867 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN
HOLE DIAMETER0.500 INCHES NOMINAL IN
STYLE DESIGNATORFLAT INTERNAL TEETH
MATERIAL THICKNESS0.037 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 31
5310PL0652572Interchangeable
interchangeable cross-reference
interchangeable
MS35333-33Interchangeable
interchangeable cross-reference
interchangeable
MILW6986Interchangeable
interchangeable cross-reference
interchangeable
7E07Interchangeable
interchangeable cross-reference
interchangeable
180440Interchangeable
interchangeable cross-reference
interchangeable
180612Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MILW6986?
MILW6986 is a WASHER,LOCK.
What parts can replace MILW6986?
There are 31 known substitutes for MILW6986: 5310PL0652572, MS35333-33, MILW6986 and 28 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MILW6986?
MILW6986 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-011-5551. 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