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99-943-6213 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

99-943-6213: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.320 INCHES MINIMUM AND 0.325 INCHES MAXIMUM IN, outside_diameter: 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN, style_designator: 270 DEGREE LOCKING KEY, surface_treatment: CADMIUM OVERALL, external_prebent_key_angle: 15.0 DEGREES NOMINAL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-166-4546, 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
99-943-6213
NSN: 5310-01-166-4546
FSC: 5310 — Nuts and Washers
CAGE: INTE9 — NATO STOCK NUMBER POTENTIAL INTERCHANGEABILITY LINK
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.320 INCHES MINIMUM AND 0.325 INCHES MAXIMUM IN
outside_diameter0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
style_designator270 DEGREE LOCKING KEY
surface_treatmentCADMIUM OVERALL
external_prebent_key_angle15.0 DEGREES NOMINAL
external_tapered_key_width0.280 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
angle_between_external_keys58.0 DEGREES MINIMUM AND 62.0 DEGREES MAXIMUM
external_prebent_key_length0.100 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
distance_from_centerline_to_inside_of_prebent_key0.325 INCHES MINIMUM AND 0.335 INCHES MAXIMUM IN
NSN5310-01-166-4546
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 99-943-6213 · 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
•
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY: 0.325 INCHES MINIMUM AND 0.335 INCHES MAXIMUM IN
•
EXTERNAL PREBENT KEY LENGTH: 0.100 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: 270 DEGREE LOCKING KEY
•
OUTSIDE DIAMETER: 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
•
EXTERNAL TAPERED KEY WIDTH: 0.280 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
•
EXTERNAL PREBENT KEY ANGLE: 15.0 DEGREES NOMINAL
•
SURFACE TREATMENT: CADMIUM OVERALL
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY0.325 INCHES MINIMUM AND 0.335 INCHES MAXIMUM IN
EXTERNAL PREBENT KEY LENGTH0.100 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
STYLE DESIGNATOR270 DEGREE LOCKING KEY
OUTSIDE DIAMETER0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
EXTERNAL TAPERED KEY WIDTH0.280 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
EXTERNAL PREBENT KEY ANGLE15.0 DEGREES NOMINAL
SURFACE TREATMENTCADMIUM OVERALL
MATERIALSTEEL OVERALL
ANGLE BETWEEN EXTERNAL KEYS58.0 DEGREES MINIMUM AND 62.0 DEGREES MAXIMUM
HOLE DIAMETER0.320 INCHES MINIMUM AND 0.325 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 99-943-6213?
99-943-6213 is a WASHER,KEY.
What is the NSN for 99-943-6213?
99-943-6213 is cataloged in the U.S. Government catalog under NSN 5310-01-166-4546. 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.