MS14145-9 - Nut

Part number MS14145-9 is a military-standard castellated flange nut designed for use in aircraft, automotive, and industrial mechanical fastening applications requiring positive locking capability. The castellated top section allows installation with a cotter pin or locking wire through a drilled bolt or shaft to prevent loosening under vibration and dynamic loads.

The integrated flange base distributes clamping force over a wider surface area, reducing the need for a separate washer and improving joint stability. Manufactured from high-strength steel with a corrosion-resistant finish, this nut is suitable for demanding aerospace and structural environments.

Dimensions

• Inside Diameter (Thread ID): 12.38 mm
• Outside Diameter (Flange OD): 20.07 mm
• Height: 6.60 mm

Configuration

• Type: Castellated flange nut
• Standard: MS14145 military specification
• Thread Style: Internal machine thread
• Material: High-strength steel alloy
• Finish: Corrosion-resistant plated finish
• Locking Method: Cotter pin / safety wire compatible
• Features: Castellated locking design, integral flange base, vibration-resistant fastening
• Applications: Aircraft landing gear, control linkages, wheel assemblies, structural hardware, and vibration-critical fastening systems