| 摘要 |
Disclosed is a gauge (2) for measuring the distance a bolt, nut, screw etc protrudes from a surface and methods of using the gauge (2). The gauge (2) comprises a collar (8) having an axial bore (84) with an opening and a predetermined diameter, a member (4) slidably mounted within at least part of the axial bore (84), and an indicator means (10). It may be determined that the diameter of a protrusion (14, 16) from a surface (18) is less that that of the opening if, when the opening of the axial bore (84) is positioned over the protrusion (14, 16), the collar (8) may be moved such that the protrusion (14,16) is wholly within the axial bore (84) and the collar (8) contacts the surface (18). If the collar (8) is moved in this way, the indicator means (10) is configured to indicate whether or not the length of the protrusion (14, 16) is within a predetermined range. |
