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Basic Erector parts included various metal beams with regularly spaced holes for assembly using nuts and bolts. A frequently promoted patented feature was the ability to fabricate a strong but lightweight hollow structural girder from four long flat pieces of stamped sheet steel, held together by bolts and nuts (US Patent 1,066,809).
They were, and to some extent still are, used for miniature instruments and modelling. They are unusual in that they were probably the most "scientific" design of screw, starting with 0BA at 6.0 mm diameter and 1.0 mm pitch and progressing in a geometric sequence where each larger number was 0.9 times the pitch of the last size.
A special type of bolt that is set into concrete, with screw threads protruding above the concrete surface to accept a nut. breakaway bolt: A breakaway bolt is a bolt with a hollow threaded shank, which is designed to break away upon impact. Typically used to fasten fire hydrants, so they will break away when hit by a car. Also used in aircraft ...
The miniatures used represent troops or vehicles (such as tanks, chariots, aircraft, ships, etc.). The games may reflect historical situations and armies, or may be futuristic or fantasy-based. This list compiles published miniature wargames categorized by their subject matter, genre, or time period covered in their rules.
A heavy-duty T-slot nut with a M12 bolt is rated to support 10000 N (about 1 imperial ton at rest). [ 2 ] Profile 40×40 (40 mm by 40 mm, with 8 mm grooves) extruded aluminum profile and the T-slot nuts to fit into them comprised the first modular system developed for use in mechanical engineering in 1980 by item Industrietechnik. [ 3 ]
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