Nipple: 5/16-24 (.315") thread ~antique Starr carbine~ musket cap, hardened steel, 1/4" square lug

Use the Specifications Tab above the image and look under Brand of Manufacturer to see recommended models this nipple fits.

• Cone length: 0.365"
• Thread journal length: 0.220"
• Overall length: 0.585"
• Diameter of base: 0.370"