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Grinnell grooved products include grooved couplings, grooved fittings, mechanical tees, valves, circuit balancing valves, copper systems, stainless steel systems, plain end systems, HDPE systems, PVC systems, G-PRESS systems, gaskets and spare parts, and preparation equipment, as well as accessories, such as strainers, tee strainers, suction diffusers, dielectric waterway transition fittings ...
Download as PDF; Printable version; ... Clevis fastener; Clothespin; Clutch (pin fastener) ... This page was last edited on 1 May 2020, ...
The clevis is a U-shaped piece that has holes at the end of the prongs to accept the clevis pin. The clevis pin is similar to a bolt, but is either partially threaded or unthreaded with a cross-hole for a split pin. A tang is a piece that is sometimes fitted in the space within the clevis and is held in place by the clevis pin.
Grinnell improved Parmalee's first practical automatic sprinkler and patented his own Grinnell sprinkler in 1882. [5] Continual improvements resulted in the glass disc sprinkler in 1890. With slight modifications, this sprinkler head is still used in modern fire sprinkler systems ; sprinklers are even called le Grinnells in France. [ 6 ]
Sheet metal screws make excellent fasteners for attaching metal hardware to wood because the fully threaded shank provides good retention in wood. Twinfast screw A Twinfast screw is a type of screw with two threads (i.e. a twin-start screw ), so that it can be driven twice as fast as a normal (i.e. single-start) screw with the same pitch. [ 4 ]
The company adopted the “Grinnell Mutual” and “Grinnell Re" brands in 2017. In 2014, Grinnell Mutual was one of first six companies investing in the Global Insurance Accelerator, [5] [6] the first startup accelerator for insurtech. In response to the COVID-19 pandemic, Grinnell Mutual announced the Trust in Tomorrow Premium Payback. [7]
The company was founded ca. 1815 as Fish, Grinnell & Co. (the senior partner of which had the memorable, if improbable, name of Preserved Fish (1766–1846)); the Grinnell was his cousin Joseph Grinnell, one of six sons of a shipper and merchant in New Bedford, Massachusetts.
One of the most common ways to produce such threaded holes is to drill a hole of appropriate size with a drill bit and then tap it with a tap. Each standard size of female screw thread has one or several corresponding drill bit sizes that are within the range of appropriate size—slightly larger than the minor diameter of the mating male ...