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AE91978E — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

AE91978E: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, hole_diameter: 0.313 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN, outside_diameter: 0.690 INCHES NOMINAL IN, special_features: COUNTAINS THREE EXTERNAL KEYS,EQUALLY SPACED, style_designator: KEY, features_provided: MAGNETIZED. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-900-4593, 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
AE91978E
NSN: 5310-00-900-4593
FSC: 5310 — Nuts and Washers
CAGE: 70709 — MARISON INDUSTRIES INC BARCO DIV (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
hole_diameter0.313 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN
outside_diameter0.690 INCHES NOMINAL IN
special_featuresCOUNTAINS THREE EXTERNAL KEYS,EQUALLY SPACED
style_designatorKEY
features_providedMAGNETIZED
surface_treatmentPASSIVATE OVERALL
material_thickness0.020 INCHES NOMINAL IN
external_prebent_key_angle90.0 DEGREES NOMINAL
external_prebent_key_width0.155 INCHES NOMINAL IN
external_prebent_key_length0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
material_document_and_classificationAMS5513 ASSN STD 1ST MATERIAL RESPONSE OR MIL-S-5059 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
NSN5310-00-900-4593
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: AE91978E · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ACES16+3 MFR REF SINGLE TREATMENT RESPONSE OVERALL
•
EXTERNAL PREBENT KEY LENGTH: 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS5513 ASSN STD 1ST MATERIAL RESPONSE OR MIL-S-5059 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.690 INCHES NOMINAL IN
•
FEATURES PROVIDED: MAGNETIZED
•
MATERIAL THICKNESS: 0.020 INCHES NOMINAL IN
•
EXTERNAL PREBENT KEY ANGLE: 90.0 DEGREES NOMINAL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONACES16+3 MFR REF SINGLE TREATMENT RESPONSE OVERALL
EXTERNAL PREBENT KEY LENGTH0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONAMS5513 ASSN STD 1ST MATERIAL RESPONSE OR MIL-S-5059 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.690 INCHES NOMINAL IN
FEATURES PROVIDEDMAGNETIZED
MATERIAL THICKNESS0.020 INCHES NOMINAL IN
EXTERNAL PREBENT KEY ANGLE90.0 DEGREES NOMINAL
SPECIAL FEATURESCOUNTAINS THREE EXTERNAL KEYS,EQUALLY SPACED
SURFACE TREATMENTPASSIVATE OVERALL
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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AE91978E?
AE91978E is a WASHER,KEY.
What is the NSN for AE91978E?
AE91978E is cataloged in the U.S. Government catalog under NSN 5310-00-900-4593. 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.