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2. External stowage platform - Wikipedia

   en.wikipedia.org/wiki/External_stowage_platform

   Like ESP-1, it is powered by the Unity Module. However, unlike ESP-1, ESP-2 is attached to the Quest Joint Airlock using a specialized ESP Attachment Device (ESPAD). ESP-2 and ESP-3 are deployable versions of the integrated cargo carrier and have the same dimensions, approximately 8.5 feet (2.6 m) long and 14 feet (4.3 m) wide.

3. List of screw and bolt types - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_and_bolt_types

   In 1913, Woolley and Meredith defined them like Anthony, but gave the following dimensions: hex head cap screws up to and including 7 ⁄ 16 inch (11.1125 mm) have a head that is 3 ⁄ 16 inch (4.7625 mm) larger than the shank diameter; screws greater than 1 ⁄ 2 inch (12.7 mm) in diameter have a head that is 1 ⁄ 4 inch (6.35 mm) larger than ...

4. Screw - Wikipedia

   en.wikipedia.org/wiki/Screw

   1 + 1 ⁄ 2 –3 55 380 90 620 Brinell 183–235 SAE grade 5.1 [52] Low or medium carbon steel; quench and tempered: No. 6– 1 ⁄ 2: 85 590 120 830 C25–40 SAE grade 5.2 [52] Low carbon martensitic steel; quench and tempered: 1 ⁄ 4 –1 85 590 120 830 C26–36 ASTM A449 - Type 2 [52] Low carbon martensitic steel; quench and tempered: C25 ...

5. Bolt (fastener) - Wikipedia

   en.wikipedia.org/wiki/Bolt_(fastener)

   Elevator bolt - Bolt with a large flat head used in conveyor system setups. Hanger bolt - Bolt that has no head, machine threaded body followed by a wood threaded screw tip. Allow nuts to be attached to what is really a screw. Hex bolt - Bolt with a hexagonal head and threaded shank. Section immediately under head may be unthreaded for ...

6. ASTM A325 - Wikipedia

   en.wikipedia.org/wiki/ASTM_A325

   In 2016, ASTM officially withdrew specification A325 and replaced it with ASTM F3125. [3] To minimize confusion, bolt head markings are unchanged and the designation A325 is retained as a grade name within the new standard. [4] In 1951, A325 bolts were recognized as equivalent to a hot driven ASTM A141 rivet. [5]

7. ISO metric screw thread - Wikipedia

   en.wikipedia.org/wiki/ISO_metric_screw_thread

   Other (usually smaller) sizes may occur to reduce weight or cost, including the small series flange bolts defined in ISO 4162 which typically have hexagonal head sizes corresponding to the smaller 1st choice thread size (eg. M6 small series flange bolts have 8mm hexagonal heads, as would normally be found on M5 bolts). [10]