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bell adapters which are like mechanical joint adapters but contain a stainless steel backup ring to maintain a positive seal against the mating flange [9]: 347 flange adapters which attach to a polyethylene pipe with butt fusion to stiffen a junction and allow another flanged pipe or fitting to be bolted on [ 9 ] : 341
For standard rectangular waveguide the second letter is A to E, where A and C are round flanges, B is square and D and E are rectangular. So for example UBR220 is a square plain cover flange for R220 waveguide (that is, for WG20, WR42), PDR84 is a rectangular gasket flange for R84 waveguide (WG15, WR112) and CAR70 is a round choke flange for ...
The first types of small modular telephone connectors were created by AT&T in the mid-1960s for the plug-in handset and line cords of the Trimline telephone. [1] Driven by demand for multiple sets in residences with various lengths of cords, the Bell System introduced customer-connectable part kits and telephones, sold through PhoneCenter stores in the early 1970s. [2]
ISO 3491:1984 Wrought copper and copper alloys — Drawn square bars — All minus tolerances on width across flats and form tolerances [Withdrawn without replacement] ISO 3492:1982 Wrought copper and copper alloys — Drawn round wire — Tolerances on diameter [Withdrawn without replacement] ISO 3493:2014 Vanilla – Vocabulary
A screw thread, often shortened to thread, is a helical structure used to convert between rotational and linear movement or force. A screw thread is an inclined plane wrapped around a cylinder or cone in the form of a helix, with the former being called a straight thread and the latter called a tapered thread.
Some examples: pin diameter and pin spacing are given in decimal fractions for both imperial and metric units, but pin length is given in vulgar fractions for imperial and decimal fractions for metric. So, the original imperial definition of a 5 A two pin plug pin spacing is 0.656 inch, the diameter 0.199 to 0.201 inch, and the length 5/8 inch.