Abstract: A thread gauge, which allows to reliably know the time for replacement by visual checking and improves the predetermined dimensional accuracy of a thread product has a go-side thread measuring portion extending from one side of a shank portion coaxially with the shank portion or a not-go-side thread measuring portion extending from an other side of the shank portion coaxially with the shank portion, a wear checking gauge line having a predetermined length and a predetermined depth formed on male thread portions and female thread portions formed on the go-side thread measuring portion or the not-go-side thread measuring portion.

Abstract: A ring gauge with a maintenance line, which can reliably and quickly let a user know at an early stage the time for replacement during maintenance of a ring gauge, is provided with a ring gauge body which has, on an inner portion, a hole-shaped measuring portion having a circular shape in a planar view and serving as a reference for various types of measuring devices, a predetermined thickness, an upper surface portion, a lower surface portion, and a wear checking gauge line which can have a linear shape formed on an inner diameter portion of the hole-shaped measuring portion.

Abstract: Due to repeated use of a gauge portion, used to perform positioning and accuracy comparison measurement at the time of manufacture of various type of molds for metalworking, a gauge line on an outer circumferential surface portion of the gauge portion can disappear due to friction. A plug gauge body, which helps a user recognize the time for maintenance and replacement of the plug gauge, has a constricted portion formed on one side of a shank portion and a cylindrical gauge portion having a uniform diameter and extending from one side of the constricted portion, with the shank portion, the constricted portion, and the gauge portion, being formed axially, a wear checking gauge line having a predetermined depth and width formed so as to extend from one end portion of an outer circumferential surface portion of the gauge portion in the direction of the constricted portion.

Abstract: A thread gauge, which allows to reliably know the time for replacement by visual checking and improves the predetermined dimensional accuracy of a thread product has a go-side thread measuring portion extending from one side of a shank portion coaxially with the shank portion or a not-go-side thread measuring portion extending from an other side of the shank portion coaxially with the shank portion, a wear checking gauge line having a predetermined length and a predetermined depth formed on male thread portions and female thread portions formed on the go-side thread measuring portion or the not-go-side thread measuring portion.

Abstract: A thread gauge, which allows to reliably know the time for replacement by visual checking and improves the predetermined dimensional accuracy of a thread product has a go-side thread measuring portion extending from one side of a shank portion coaxially with the shank portion or a not-go-side thread measuring portion extending from an other side of the shank portion coaxially with the shank portion, a wear checking gauge line having a predetermined length and a predetermined depth formed on male thread portions and female thread portions formed on the go-side thread measuring portion or the not-go-side thread measuring portion.

Abstract: A thread gauge, which allows to reliably know the time for replacement by visual checking and improves the predetermined dimensional accuracy of a thread product has a go-side thread measuring portion extending from one side of a shank portion coaxially with the shank portion or a not-go-side thread measuring portion extending from an other side of the shank portion coaxially with the shank portion, a wear checking gauge line having a predetermined length and a predetermined depth formed on male thread portions and female thread portions formed on the go-side thread measuring portion or the not-go-side thread measuring portion.

Abstract: Due to repeated use of a gauge portion, used to perform positioning and accuracy comparison measurement at the time of manufacture of various type of molds for metalworking, a gauge line on an outer circumferential surface portion of the gauge portion can disappear due to friction. A plug gauge body, which helps a user recognize the time for maintenance and replacement of the plug gauge, has a constricted portion formed on one side of a shank portion and a cylindrical gauge portion having a uniform diameter and extending from one side of the constricted portion, with the shank portion, the constricted portion, and the gauge portion, being formed axially, a wear checking gauge line having a predetermined depth and width formed so as to extend from one end portion of an outer circumferential surface portion of the gauge portion in the direction of the constricted portion.

Abstract: A ring gauge with a maintenance line, which can reliably and quickly let a user know at an early stage the time for replacement during maintenance of a ring gauge, is provided with a ring gauge body which has, on an inner portion, a hole-shaped measuring portion having a circular shape in a planar view and serving as a reference for various types of measuring devices, a predetermined thickness, an upper surface portion, a lower surface portion, and a wear checking gauge line which can have a linear shape formed on an inner diameter portion of the hole-shaped measuring portion.