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AC028551 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

AC028551: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.259 INCHES NOMINAL IN, outside_diameter: 0.446 INCHES NOMINAL IN, special_features: EXTERNAL KEY NOT PREBENT, split_key_length: 0.125 INCHES NOMINAL IN, style_designator: KEY. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-452-1808, 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
AC028551
NSN: 5310-00-452-1808
FSC: 5310 — Nuts and Washers
CAGE: K1037 — MEGGITT AEROSPACE LIMITED (GBR)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.259 INCHES NOMINAL IN
outside_diameter0.446 INCHES NOMINAL IN
special_featuresEXTERNAL KEY NOT PREBENT
split_key_length0.125 INCHES NOMINAL IN
style_designatorKEY
material_thickness0.033 INCHES NOMINAL IN
external_key_quantity1
external_prebent_key_width0.115 INCHES NOMINAL IN
external_tapered_key_width0.256 INCHES NOMINAL IN
angle_between_external_keys60.0 DEGREES NOMINAL
overall_distance_including_keys0.627 INCHES NOMINAL IN
NSN5310-00-452-1808
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: AC028551 · 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: 0.349 INCHES NOMINAL IN
•
SPLIT KEY LENGTH: 0.125 INCHES NOMINAL IN
•
OVERALL DISTANCE INCLUDING KEYS: 0.627 INCHES NOMINAL IN
•
STYLE DESIGNATOR: KEY
•
OUTSIDE DIAMETER: 0.446 INCHES NOMINAL IN
•
EXTERNAL TAPERED KEY WIDTH: 0.256 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.033 INCHES NOMINAL IN
•
EXTERNAL KEY QUANTITY: 1
TECHNICAL CHARACTERISTICS
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY0.349 INCHES NOMINAL IN
SPLIT KEY LENGTH0.125 INCHES NOMINAL IN
OVERALL DISTANCE INCLUDING KEYS0.627 INCHES NOMINAL IN
STYLE DESIGNATORKEY
OUTSIDE DIAMETER0.446 INCHES NOMINAL IN
EXTERNAL TAPERED KEY WIDTH0.256 INCHES NOMINAL IN
MATERIAL THICKNESS0.033 INCHES NOMINAL IN
EXTERNAL KEY QUANTITY1
SPECIAL FEATURESEXTERNAL KEY NOT PREBENT
EXTERNAL PREBENT KEY WIDTH0.115 INCHES NOMINAL 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: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AC028551?
AC028551 is a WASHER,KEY.
What is the NSN for AC028551?
AC028551 is cataloged in the U.S. Government catalog under NSN 5310-00-452-1808. 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.