MS9321-12 - Washer

Part number MS9321-12 is a military standard flat washer made from 321 corrosion-resistant stainless steel (CRES) and designed for use with 3/8-inch diameter fasteners in aerospace, military, and industrial fastening applications. 

Specifications

• Type: Flat washer
• Material: 321 Stainless Steel (CRES), AMS 5510
• Inside Diameter (Hole): 0.396–0.411 in. (10.06–10.44 mm)
• Outside Diameter: 0.740–0.760 in. (18.80–19.30 mm)
• Thickness: 0.073–0.083 in. (1.85–2.11 mm)
• Measured Dimensions (image): ID 11.26 mm × OD 19.06 mm × Thickness 2.06 mm
• Finish: Passivated stainless steel
• Surface Finish: 63 micro-inch
• NSN: 5310-00-903-2612

Features

• Corrosion-resistant stainless steel construction
• Distributes clamp load under bolt heads and nuts
• Suitable for high-temperature and vibration-prone environments
• Aerospace-qualified military hardware
• Compatible with 3/8-inch aircraft bolts and structural fasteners