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492745 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

492745: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.526 INCHES NOMINAL IN, hardness_rating: 20.0 ROCKWELL C MINIMUM AND 26.0 ROCKWELL C MAXIMUM, special_features: EXTERNAL KEY NOT PREBENT, split_key_length: 0.071 INCHES NOMINAL IN, style_designator: KEY. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-470-5342, 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
492745
NSN: 5310-00-470-5342
FSC: 5310 — Nuts and Washers
CAGE: 33615 — ENJET AERO MANCHESTER LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.526 INCHES NOMINAL IN
hardness_rating20.0 ROCKWELL C MINIMUM AND 26.0 ROCKWELL C MAXIMUM
special_featuresEXTERNAL KEY NOT PREBENT
split_key_length0.071 INCHES NOMINAL IN
style_designatorKEY
material_thickness0.042 INCHES NOMINAL IN
external_key_quantity1
external_prebent_key_width1.000 INCHES NOMINAL IN
external_tapered_key_width1.000 INCHES NOMINAL IN
angle_between_external_keys95.0 DEGREES NOMINAL
overall_distance_including_keys0.917 INCHES NOMINAL IN
NSN5310-00-470-5342
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 492745 · 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
•
SPLIT KEY LENGTH: 0.071 INCHES NOMINAL IN
•
OVERALL DISTANCE INCLUDING KEYS: 0.917 INCHES NOMINAL IN
•
HARDNESS RATING: 20.0 ROCKWELL C MINIMUM AND 26.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5504 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
EXTERNAL TAPERED KEY WIDTH: 1.000 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.042 INCHES NOMINAL IN
•
EXTERNAL KEY QUANTITY: 1
TECHNICAL CHARACTERISTICS
SPLIT KEY LENGTH0.071 INCHES NOMINAL IN
OVERALL DISTANCE INCLUDING KEYS0.917 INCHES NOMINAL IN
HARDNESS RATING20.0 ROCKWELL C MINIMUM AND 26.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5504 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
EXTERNAL TAPERED KEY WIDTH1.000 INCHES NOMINAL IN
MATERIAL THICKNESS0.042 INCHES NOMINAL IN
EXTERNAL KEY QUANTITY1
SPECIAL FEATURESEXTERNAL KEY NOT PREBENT
EXTERNAL PREBENT KEY WIDTH1.000 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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 492745?
492745 is a WASHER,KEY.
What is the NSN for 492745?
492745 is cataloged in the U.S. Government catalog under NSN 5310-00-470-5342. 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.