The Nut is a self-locking, double hexagon design, with the part number 639298. This nut features a nominal thread size of 0.250 inches and a thread quantity of 28 per inch. It has an overall height ranging from 0.314 inches to 0.329 inches and a width across flats of 0.367 to 0.376 inches. The locking feature utilizes a prevailing torque all-metal design, ensuring secure fastening under various conditions. The nut is treated with chromic acid and is suitable for applications with a temperature rating of up to 550.0 Fahrenheit.
Features & Benefits
Designed as a self-locking nut to prevent loosening
Double hexagon shape allows for easy gripping and torque application
Prevailing torque all metal design enhances reliability
Compatible with various aircraft engine applications
Technical Information
NIIN
005765559
NSN
5310-00-576-5559
FSCG
5310
FSCG Category
Nuts and Washers
UNSPSC Code
31161727
UNSPSC Category
Hexagonal nuts
Lead Time (Days)
325
Product Class Description
Hexagonal nuts
Storage Required
No
Unit Of Measure
EA
Pieces Per Pound
0
DFAR Applicable
No
Revision Level Applicable
No
Product Class
31161727
Material Composition
STAINLESS STEEL (S/STEEL)
Design Holder CAGE Code
77445
Design Holder
PRATT & WHITNEY AIR
Potential Alternates
5310005765559
Aircraft Makes
Boeing
McDonnell Douglas
Aircraft Models
747
DC9
727
DC9
Shipping Details
Dry Ice
No
ECCN
EAR99
Proprietary Part
No
Hazmat
No
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