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HMQS Gayundah was a flat-iron gunboat operated by the Queensland Maritime Defence Force and later the Royal Australian Navy (as HMAS Gayundah).She entered service in 1884 and was decommissioned and sold to a civilian company in 1921.
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HMQS Paluma was a flat-iron gunboat operated by the Queensland Maritime Defence Force and later the Royal Australian Navy (as HMAS Paluma).She entered service on 28 October 1884, was decommissioned in 1916 and then sold to the Victorian Ports and Harbours Department, who operated her under the name Rip until 1948 when she was retired.
The flat-iron gunboats were designed for coastal defence and bombardment, and were constructed from iron. They were not rigged, and the single 10-inch (18 ton) muzzle-loading rifle was fitted forward on a hydraulic mount that allowed it to be lowered for a sea passage to improve the vessel's seaworthiness, and raised for action. [1]
Square head cap screws up to and including 3 ⁄ 4 inch (19.05 mm) have a head 1 ⁄ 8 inch (3.175 mm) larger than the shank; screws larger than 3 ⁄ 4 inch (19.05 mm) have a head 1 ⁄ 4 inch (6.35 mm) larger than the shank. [9] In 1919, Dyke defined them as screws that are threaded all the way to the head. [10] socket screw
The SAE steel grades system is a standard alloy numbering system (SAE J1086 – Numbering Metals and Alloys) for steel grades maintained by SAE International.. In the 1930s and 1940s, the American Iron and Steel Institute (AISI) and SAE were both involved in efforts to standardize such a numbering system for steels.
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