MS9321-10 - Washer

Part number MS9321-10 is a Military Standard (MS) flat washer manufactured from 321 corrosion-resistant stainless steel (CRES) and intended for use with 1/4-inch diameter fasteners in aerospace, military, and industrial applications. It provides load distribution and surface protection under bolt heads and nuts.

Specifications

• Type: Flat Washer
• Material: 321 Stainless Steel (CRES), AMS 5510
• Inside Diameter (Hole): 0.271–0.286 in. (6.88–7.26 mm)
• Outside Diameter: 0.490–0.510 in. (12.45–12.95 mm)
• Thickness: 0.057–0.067 in. (1.45–1.70 mm)
• Measured Dimensions (image):
  • ID: 8.06 mm
  • OD: 12.71 mm
  • Thickness: 1.58 mm
• Surface Treatment: Passivated
• Surface Finish: 63 micro-inch
• NSN: 5310-00-763-3925

Features

• Corrosion-resistant 321 stainless steel construction
• Aerospace and military-grade hardware
• Flat bearing surface distributes clamp loads
• Helps prevent damage to mating materials
• Suitable for high-temperature and vibration environments