1/4" - 28 Serrated Flange Locknut. 7/16" W X 15/64" H, Steel Grade 8.

Part #1306903

MFG #1306903

Specifications

Brand: Hardware Specialty

Finish: None

Material: Steel Grade 8

Mil-Spec: No

Nut Height: 15/64"

Nut Width: 7/16"

System of Measurement: Unified (inch)

Thread Fit: Class 2B

Thread Size: 1/4" - 28