Back Home / Fasteners / LOCK NUT NYLON STAINLESS #4-40 LOCK NUT NYLON STAINLESS #4-40 SKU: XLN440SS Category: Fasteners 18.8 Stainless Steel 4-40 Thread size These locknuts have good chemical resistance and may be mildly magnetic The nylon insert grips the bolt to resist loosening without damaging threads They’re reusable, but their holding power lessens with each use Case Quantity: 100 Log In For Pricing