Special nickel alloy Monel K500 UNS N05500 2.4375 nylon lock nut
A nyloc nut, also referred to as a nylon-insert lock nut, polymer-insert lock nut, or elastic stop nut, is a kind of locknut with a nylon collar that increases friction on the screw thread.
Monel Is A Group Of Alloys That Primarily Consists Of Nickel And Copper With Trace Amounts Of Iron, Manganese, Carbon, And Silicon. ASTM B865-04 K500 Monel Fasteners Are A Precipitation Hardened Nickel – Copper Alloy. One Of The Advantages Of Using The Alloy UNS N05500 Bolts Is That, The Alloy Is A Combination Of The Excellent Corrosion Resistance As Characterized By The Monel 400 Alloy Along With The Added Feature Of An Increased Tensile Strength And Hardness.