enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. ASTM A325 - Wikipedia

    en.wikipedia.org/wiki/ASTM_A325

    ASTM A325 is an ASTM International standard for heavy hex structural bolts, titled Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength. It defines mechanical properties for bolts that range from 1 ⁄ 2 to 1 + 1 ⁄ 2 inches (13 to 38 mm) in diameter. [1]

  3. Bolted joint - Wikipedia

    en.wikipedia.org/wiki/Bolted_joint

    Bolt preload can also be controlled by torquing the bolt to the point of yielding. Under some circumstances, a skilled operator can feel the drop off of the work required to turn the torque wrench as the material of the bolt begins to yield. At that point the bolt has a preload determined by the bolt area and the yield strength of the bolt ...

  4. Preload (engineering) - Wikipedia

    en.wikipedia.org/wiki/Preload_(engineering)

    Internal stress to a bearing through application of negative clearance is known as bearing preloading. Advantages of preloading include the following: maintain axial and radial position for accurate displacements of angular movements; increase bearing rigidity; prevent sliding or gyroscope-like movements, especially with high acceleration or ...

  5. ASTM A490 - Wikipedia

    en.wikipedia.org/wiki/ASTM_A490

    ASTM A490 and ASTM A490M are ASTM International standards for heavy hex structural bolts made from alloy steel.The imperial standard is officially titled Standard Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile Strength, while the metric standard (M) is titled Standard Specification for High-Strength Steel Bolts, Classes 10.9 and 10.9.3, for Structural ...

  6. Bearing pressure - Wikipedia

    en.wikipedia.org/wiki/Bearing_pressure

    The bolts then play the role of stops: the screws endure shear stress whereas the hole endure bearing pressure. In order to increase the bearing pressure of a material, there are several factors that can be considered. One of the most effective methods is to increase the surface area of the material.

  7. ASTM A354 - Wikipedia

    en.wikipedia.org/wiki/ASTM_A354

    ASTM A354 is an ASTM International standard that defines chemical and mechanical properties for alloy steel bolts, screws, studs, and other externally threaded fasteners.It is officially titled: Standard Specification for Quenched and Tempered Alloy Steel Bolts, Studs, and Other Externally Threaded Fasteners.

  8. Bearing surface - Wikipedia

    en.wikipedia.org/wiki/Bearing_surface

    The bearing surface describes the contact area between two objects used as datum. It is often the underside of a screw head (male seat, marked A) or a flat at the end of the screw thread (female seat, marked B). A bearing surface in mechanical engineering is the area of contact between two objects.

  9. Direct tension indicator - Wikipedia

    en.wikipedia.org/wiki/Direct_tension_indicator

    DTIs within the RCSC specification section 8.2.4 are described thus: "ASTM F959 direct tension indicators are recognized in this Specification as a bolt-tension-indicating device. Direct tension indicators are hardened washer shaped devices incorporating small arch-like protrusions on the bearing surface that are designed to deform in a ...