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2. Multi-jackbolt tensioner - Wikipedia

   en.wikipedia.org/wiki/Multi-jackbolt_tensioner

   Multi-jackbolt tensioners (MJTs), registered under the trademark Superbolt or Supernut, are designed to decrease the torque required to tighten large bolted joints. One of the major problems associated with traditional bolt tightening methods is as the diameter of the bolt increases, the amount of torque required to tighten it increases in the third power of the diameter. [1]

3. Socket wrench - Wikipedia

   en.wikipedia.org/wiki/Socket_wrench

   Socket set with ratchet (above), four hex sockets and a universal joint. A socket wrench (or socket spanner) is a type of spanner (or wrench [1] in North American English) that uses a closed socket format, rather than a typical open wrench/spanner to turn a fastener, typically in the form of a nut or bolt.

4. Screw thread - Wikipedia

   en.wikipedia.org/wiki/Screw_thread

   Another common inspection point is the straightness of a bolt or screw. This topic comes up often when there are assembly issues with predrilled holes as the first troubleshooting point is to determine if the fastener or the hole is at fault. ASME B18.2.9 "Straightness Gage and Gaging for Bolts and Screws" was developed to address this issue.

5. Exclusive-Boeing presses suppliers on tightening bolts after ...

   www.aol.com/news/exclusive-boeing-presses...

   WASHINGTON (Reuters) -Boeing issued a bulletin to its suppliers late last week that laid out practices to ensure bolts are properly torqued after multiple airlines reported loose hardware during ...

6. Loose bolts found on grounded Boeing 737 Max 9 planes after ...

   www.aol.com/issues-reported-boeing-737-max...

   The airline operates 79 Max 9 planes. Reutersquoted a source familiar with the matter as saying that United had identified nearly 10 aircraft with loose bolts during its initial inspections.

7. Lug nut - Wikipedia

   en.wikipedia.org/wiki/Lug_nut

   Additionally, under-tightened lug nuts may come loose with time. The tool size needed for removal and installation depends on the type of lug nut. The three most common hex sizes for lug nuts are 17 mm, 19 mm, and 21 mm, while 22 mm, 23 mm, 11 ⁄ 16 inch (17.5 mm), and 13 ⁄ 16 inch (20.6 mm) are less commonly used.

8. Boeing urges 737 Max inspections for possible loose bolt

   www.aol.com/boeing-urges-737-max-inspections...

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9. Clevis fastener - Wikipedia

   en.wikipedia.org/wiki/Clevis_fastener

   A bolt can function as a clevis pin, but a bolt is not intended to take the lateral stress that a clevis pin must handle. Normal bolts are manufactured to handle tension loads, whereas clevis pins and bolts are designed to withstand shearing forces. The sheering strength of a threaded bolt is determined by its inner thread diameter.