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MILW6986 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

MILW6986: WASHER,LOCK.

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 part is cataloged in the U.S.

Government catalog 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
NIINs: 000115551, 000138578, 000180440, 000180612, 000180636, 000228834, 005146674, 005790079, 005957237, 005967693, 006163555, 006559758, 008473940, 009587252
FSC: 5310 — Nuts and Washers
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
•
STYLE DESIGNATOR: FLAT INTERNAL TEETH
•
OUTSIDE DIAMETER: 0.867 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.037 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORFLAT INTERNAL TEETH
OUTSIDE DIAMETER0.867 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN
MATERIAL THICKNESS0.037 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN
HOLE DIAMETER0.500 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 8
1224Reference document
Same NSN cross-reference
Reference document — Secondary reference
1229G423Reference document
Same NSN cross-reference
Reference document — Secondary reference
115551Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
FC2192Reference document
Same NSN cross-reference
Reference document — Secondary reference
786610Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
P76Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MILW6986?
MILW6986 is a WASHER,LOCK.
What parts can replace MILW6986?
There are 8 known substitutes for MILW6986: 1224, 1229G423, 115551 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MILW6986?
MILW6986 is cataloged in the U.S. Government catalog under NSN 5310-00-011-5551. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.