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  1. Torquester

    Lock washers on A325 bolts?

    The straight-forward answer relative to the RCSC is that we don't recognize helical spring lock washers in any way. That simply means we don't contemplate their use, and I've never heard a fellow committee member question this lack of mentioning them. Although the section wasn't contemplated...
  2. Torquester

    Bolt holes

    The conservative answer is you no longer have a bearing connection, but a slip-critical one. The hole sizes listed in Table J3.3 are "maximum" sizes for normal sized holes. Similarly, contractors sometimes claim that all holes are 'standard' size provided they stop just short of the specified...
  3. Torquester

    Prevailing torque external fasteners

    You will likely have more options at less expense if you consider having the prevailing torque element within the nuts rather than the bolts.
  4. Torquester

    Pre Tension in Bolt

    The strength of the 1" fastener you intend to use is an important variable. The 51 kip target tension is for 120 ksi structural bolts of heavy hex pattern in slip-critical connections. A normal hex pattern automotive fastener of the same strength level (SAE J429 Grade 5 or ASTM A449) would...

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