AMK Blog

"Screw & Washer Assemblies" are known as "SEMS" in the fastener industry. They consist of a screw with an integrally retained washer. The washer is installed during the thread rolling process resulting in the washer being retained above the thread  start. Similar to KEPS nuts many washers types are available, including toothed, conical, conical toothed, flat and specialty washers. SEMS offer a big efficiency savings for rapid assembly processes and the cost is reasonable compared to...

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Posted on April 22, 2020


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 rap...

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Posted on July 23, 2019