RIV NUT/Aluminum, keyless, 6/32 NAS1329A06-75 pack of 100Flat Head Riv Nut | 6-32 Thread Size, Keyless, 0.438in LengthNAS1329 open end, flat head riv nuts are made of 5056-5 aluminum alloy with an anodized finish to MIL-A-8625 class 1 standard. Available in both keyed and keyless versions. This NAS1..