| 摘要 |
A collar (14) for a swage-type fastener (10, 10a, 10b, 10c, 10d), the collar (14) being as-headed collar (14) which is produced directly from cold working and which is strain hardened directly from cold working without changing hardness using a thermal process, wherein the ratio of the outer diameter to the inner diameter of said as-headed collar (14) is between about 1.47 to 1.55 such as to reduce the swage load required to swage said as-headed collar (14). |
