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475493 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

475493: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 4.100 INCHES MINIMUM AND 4.200 INCHES MAXIMUM IN, outside_diameter: 4.263 INCHES MINIMUM AND 4.281 INCHES MAXIMUM IN, style_designator: EXTERNAL AND INTERNAL PRE-BENT KEYS, material_thickness: 0.039 INCHES MINIMUM AND 0.047 INCHES MAXIMUM IN, external_key_quantity: 18. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-941-0158, 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
475493
NSN: 5310-00-941-0158
FSC: 5310 — Nuts and Washers
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter4.100 INCHES MINIMUM AND 4.200 INCHES MAXIMUM IN
outside_diameter4.263 INCHES MINIMUM AND 4.281 INCHES MAXIMUM IN
style_designatorEXTERNAL AND INTERNAL PRE-BENT KEYS
material_thickness0.039 INCHES MINIMUM AND 0.047 INCHES MAXIMUM IN
external_key_quantity18
internal_key_quantity5
external_prebent_key_width0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
internal_prebent_key_width0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
internal_prebent_key_length0.260 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN
overall_distance_including_keys4.310 INCHES MINIMUM AND 4.320 INCHES MAXIMUM IN
material_document_and_classificationAMS5040 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5042 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-941-0158
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 475493 · 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
•
INTERNAL PREBENT KEY WIDTH: 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
•
OVERALL DISTANCE INCLUDING KEYS: 4.310 INCHES MINIMUM AND 4.320 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: EXTERNAL AND INTERNAL PRE-BENT KEYS
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS5040 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5042 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 4.263 INCHES MINIMUM AND 4.281 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.039 INCHES MINIMUM AND 0.047 INCHES MAXIMUM IN
•
EXTERNAL KEY QUANTITY: 18
•
INTERNAL PREBENT KEY LENGTH: 0.260 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
INTERNAL PREBENT KEY WIDTH0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
OVERALL DISTANCE INCLUDING KEYS4.310 INCHES MINIMUM AND 4.320 INCHES MAXIMUM IN
STYLE DESIGNATOREXTERNAL AND INTERNAL PRE-BENT KEYS
MATERIAL DOCUMENT AND CLASSIFICATIONAMS5040 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5042 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER4.263 INCHES MINIMUM AND 4.281 INCHES MAXIMUM IN
MATERIAL THICKNESS0.039 INCHES MINIMUM AND 0.047 INCHES MAXIMUM IN
EXTERNAL KEY QUANTITY18
INTERNAL PREBENT KEY LENGTH0.260 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN
EXTERNAL PREBENT KEY WIDTH0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
MATERIALSTEEL 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 475493?
475493 is a WASHER,KEY.
What is the NSN for 475493?
475493 is cataloged in the U.S. Government catalog under NSN 5310-00-941-0158. 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.