ND Patch also known as Nylon Patch is a prevailing torque locking mechanism for fasteners. ND Patch can be applied to internal or external threads of almost any size. One of the most common types of self-locking fasteners on the market. Page 1 of 1 Fastenal Product Standard REV-03 Date: December 16, 2014 SSS.CNP.BO.NP Socket Set Screws, Cone Point, Black Oxide, with Nylon Patch The information below lists the required dimensional, chemical and physical characteristics of the.
The pre- applied patch forms a tough film on the thread, increases the pressure on the thread flanks. As a result, flanks on the uncoated side of the threads are forced together. The friction generated prevents loosening of the bolt.
Nylon Locking/Sealing Patch is a specially formulated thermoplastic nylon material that is bonded to the threads of fasteners to create an interference fit upon installation of the fastener with the mating component. Commonly refered to as a Prevailing Torque fastener solution, the Astorlok.
The patch increases the prevailing torque and provides excellent vibration resistance, allowing the screw to be locked in any position when assembled. TORQUE Program Example Calculation - Metric Units Presented below are the results from TORQUE for a M12 Grade 8.8 bolt with a nylon patch type locking device that creates a prevailing torque. Categories of prevailing torque type nuts include: all metal and nylon insert lock nuts. SURFACE-BEARING - a free spinning nut that requires tightening against a bearing surface in order for the. Prevailing torque design can be optimized in accordance with the mechanical structure Prevailing torque and coating locations can be tailored. PATCH-STYLE LENGH -STD 4-6 PITCHES 3-4 PITCHES ON PART LIFT AMBIENT TEMP INDEFINITE INDEFINITE FEATURE CHARACTERISTICS Eslok