Above, two Indestro examples of what are commonly called "Nut and Tap" wrenches. The centre hole served two purposes. First, it could be fit over a tap to act as a tap handle. Second, a bolt inserted through the holes on a collection of such wrenches would hold them together in a set.
![]() |
1935 |
Below, a stamped open-end wrench also made by Indestro. The interesting feature is the 3/8-24 die in the centre.
Below, from the 1935 Indestro catalogue:
I've got almost a full set of the Indestros (I've just finally turned up the 7/16- 20 and I don't have the "attractive carton."). These were made from hardened high carbon steel, and I still find a use for them as thread chasers.
Below, a similar wrench marked "Astra." I don't know who made this one. It incorporates a die for a 5/16-24 thread.
I've got almost a full set of the Indestros (I've just finally turned up the 7/16- 20 and I don't have the "attractive carton."). These were made from hardened high carbon steel, and I still find a use for them as thread chasers.
Below, a similar wrench marked "Astra." I don't know who made this one. It incorporates a die for a 5/16-24 thread.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiPnew6NzoxQkadrnkiFdsvFLeYMfNd7sfzH2aD9_L27c6pnemd4rVsvTUZFq_BLAX2YEv_aqrwSZaWFyxFevK3JtjVhURwUXpqI_cInUZnhJNA-unqpuoHUCyrb5B2QR42YprrXjgZr6A/s640/Thread-chaser-Astra.jpg)
Below, one made by the Canadian tool company Gray, with a 1/4-28 thread die:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj1rjY7gVe5PeXkJKtK-4iQfTZ96nyGzLMJRRXEqUERAICGFhFOaqh0sJHWTO9yYv26MeUXHaDJBMaleeLJi7S3OS7pPx_nImTShkwtp-n63JufvewQ-Bxo9IaMVHCP-7nK-t9n6_u2aNI/s640/Thread-chaser-Gray.jpg)
Finally, a 5/16-24 die in the middle of a "Wizard" wrench made by the Wakefield Wrench Company:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhO_Pm8OGV71Lvs2WsNIpoxFOmzUoeLCGcdAiDvJJn5VQ0OkcLyHj2qflqbfMmdbqYnEyBprLxyZLBgXp2uwKGeEyhVF5ybNPAz0PwDYdhu_Le2E6umda2HAf7OWXGfEXpicOL8Qt-pdgA/s640/Thread-chaser-Wizard.jpg)
I find it curious that every one of these wrenches I've stumbled across has a die only for the fine thread series. Possibly, fine threads were more likely to be damaged? Anyway, an interesting idea for a wrench that no longer seems to be offered by tool makers today.
No comments:
Post a Comment