Patent ID: 7802813

Claim:
A tubular part for fixing and holding a fixing object part inserted therein, the fixing object part being fixed by inwardly crimping a circumferential wall on a side of one end opening of the tubular part, comprising: an annular step formed at an inner peripheral surface of the circumferential wall of the tubular part; a chamfered corner provided, prior to crimping, on the inner peripheral surface of the circumferential wall at the one end opening; a tapered portion formed, prior to crimping, on an outer peripheral surface of the circumferential wall at the one end opening; an inner annular surface provided in the fixing object part attached to the annular step; an outer annular surface provided in the fixing object opposite to the inner annular surface and opposing the one end opening; a degree of chamfering being such that chamfering is performed between a point at a thickness T 1 measured from an outer circumferential surface of the one end opening and a point at a length L 1 measured from an end surface of the opening, and when a thickness of the circumferential wall of the opening is represented as T, (T−T 1 )/T being 0.05 to 0.9, (T−T 1 )/L 1 being 0.8 to 1.2, a length L 2 of the tapered portion from the end surface of the one end opening prior to crimping being larger than L 1 ; and a length from the end surface of the one end opening to the outer annular surface prior to crimping being larger than L 1 but smaller than L 2 .