Welcome Folks !
“Nut & Washer Assemblies” are known as “KEPS” in the fastener industry.
According to Wikipedia the name stems from the “kep” in ShaKEProof (an early innovator of fastener designs) and the “s” is because usually more than one are purchased.
They consist of a nut with an integrally retained washer. Many washers types are available, including toothed, conical, conical toothed, flat and specialty washers.
KEPS offer a big efficiency savings for rapid assembly processes.
AMK offers a considerable selection of KEPS nuts, especially conical KEPS which are intended for use fastening sheet-metal gauge materials to a heavier material.
Here are some examples of KEPS nuts we carry.
Please contact AMK for assistance.