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645747 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

645747: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1010 OVERALL, hole_diameter: 0.960 INCHES NOMINAL IN, outside_diameter: 1.290 INCHES NOMINAL IN, style_designator: KEY, external_prebent_key_width: 0.205 INCHES NOMINAL IN, material_document_and_classification: AMS5040 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-403-3528, 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
645747
NSN: 5310-00-403-3528
FSC: 5310 — Nuts and Washers
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OVERALL
hole_diameter0.960 INCHES NOMINAL IN
outside_diameter1.290 INCHES NOMINAL IN
style_designatorKEY
external_prebent_key_width0.205 INCHES NOMINAL IN
material_document_and_classificationAMS5040 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-403-3528
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 645747 · 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
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS5040 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.290 INCHES NOMINAL IN
•
EXTERNAL PREBENT KEY WIDTH: 0.205 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 1010 OVERALL
•
HOLE DIAMETER: 0.960 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONAMS5040 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.290 INCHES NOMINAL IN
EXTERNAL PREBENT KEY WIDTH0.205 INCHES NOMINAL IN
MATERIALSTEEL COMP 1010 OVERALL
HOLE DIAMETER0.960 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 645747?
645747 is a WASHER,KEY.
What is the NSN for 645747?
645747 is cataloged in the U.S. Government catalog under NSN 5310-00-403-3528. 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.