| 摘要 |
<p>In a glow plug configured such that a metallic, tubular member (21) having a heater (11) fixedly provided therein is joined to a metallic shell (31), an external-thread portion is formed on the outer circumferential surface of the metallic shell (31) so as to allow the glow plug to be screwed into a plug-mounting hole formed in an engine head (101). An annular protrusion (22) is formed on the outer circumferential surface of the metallic, tubular member (21) in such a manner as to protrude radially outward, to annularly extend in the circumferential direction, and to be located in the vicinity of a distal end of the metallic shell (31). A distally-facing end face (23) of the annular protrusion (22) abuts an annular seat face (108) in the mounting hole, and the metallic, tubular member (21) and the metallic shell (31) are joined such that a distal end face (34) of the metallic shell (31) abuts a rearward-facing end face (25) of the annular protrusion (22).</p> |
