Antifouling cap for protecting threads of oil inlet seat of high-pressure oil rail

The utility model relates to an anti-fouling cap for protecting threads of an oil inlet seat of a high-pressure oil rail, a part of the length area of the inner bottom surface of the anti-fouling cap is in interference fit with external threads of the oil inlet seat, an opening is a trumpet-shaped conical flaring with a given angle, and a convex structure is arranged at the bottom of the inner surface of the anti-fouling cap. The shape of the protruding structure is in the form of a circular truncated cone and a cylinder matched with the conical surface of the oil inlet base. The oil inlet seat thread is fully surrounded by the antifouling cap, so that the external thread of the oil inlet seat of the high-pressure oil rail is prevented from being collided and scratched; the antifouling cap is in interference fit with the inner conical surface and the outer thread of the oil inlet seat, so that the functions of mounting, fastening and loosening prevention are realized; due to the conical flaring, the antifouli