Acorn Nuts - Brass Hex nut with a closed-endAlso known as an acorn nut, cap nut, or dome nutDomed head to protect external threadFeatures a low crownEasily removableBrass fasteners offer superior corrosion resistance and are good conductors of heat and electricityBrass fasteners are often used in pipes, weather stripping, trim, radiators, musical instruments, and firearms WARNING: This product can expose you to chemicals such as nickel, lead, or chromium, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov Sizing Specifications #4-40: 1/4" Flats, 1/4" Height#6-32: 5/16" Flats, 9/32" Height#8-32: 5/16" Flats, 9/32" Height#10-24: 3/8" Flats, 11/32" Height#10-32: 3/8" Flats, 11/32" Height#12-24: 3/8" Flats, 11/32" Height1/4"-20: 7/16" Flats, 3/8" Height1/4"-28: 7/16" Flats, 3/8" Height5/16"-18: 9/16" Flats, 7/16" Height5/16"-24: 9/16" Flats, 7/16" Height3/8"-16: 5/8" Flats, 1/2" Height3/8"-24: 5/8" Flats, 1/2" Height7/16"-14: 3/4" Flats, 9/16" Height7/16"-20: 3/4" Flats, 9/16" Height1/2"-13: 3/4" Flats, 9/16" Height1/2"-20: 3/4" Flats, 9/16" Height5/8"-11: 1" Flats, 3/4" Height5/8"-18: 1" Flats, 3/4" Height3/4"-10: 1-1/16" Flats, 7/8" Height Product Specification Material: BrassThread Direction: Right HandSizing: Nut size - Threading Product Specification Material: BrassThread Direction: Right HandSizing: Nut size - Threading Listing photo is generic for the fastener type listed in this listing and is not to scale. Please refer to the description for fastener details. If in doubt, please ask a question through chat or email. We will respond with the requested information quickly. Listing photo is generic for the fastener type listed in this listing and is not to scale. Please refer to the description for fastener details. If in doubt, please ask a question through chat or email. We will respond with the requested information quickly.