The Engineering Notebook

Tag: Bolts

  • 6P Hex Head Bolt Sizes

    Reference guide for 6P hex head bolts in metric and imperial standards, including thread size and head dimensions

  • Counterbore Holes for Socket Head Cap Scews

    Socket head cap screws paired with counterbore holes offer flush mounting, clean aesthetics, and protection. Perfect for precision engineering with space constraints.

  • NAS1102 CSK Screws: Advanced Fastening Solutions for High-Performance Applications

    A deep dive into the specifications, applications, and advantages of NAS1102 CSK Screws.

  • How to Determine Through Size and Hole Tolerances for Fasteners

    A guide to calculating hole tolerances for bolted assemblies, covering examples for both metric and imperial through holes.

  • How to Dimension Hole Features on a 2D Technical Drawing

    This guide explains two approaches to dimensioning holes on a 2D technical drawing: prioritizing hole position for non-critical assemblies, or critical mating components.

  • Hole Size For Metric Bolts

    Standardising hole sizes across engineering designs offers several important advantages: Metric Fastener Hole Size(No Doweling Feature) Fastener Pin Diameter Hole Size Hole Tolerance Positional Tolerance M3 3.00 3.25 +/-0.05 0.2 M4 4.00 4.25 M5 5.00 5.25 M6 6.00 6.25 M8 8.00 8.25 M10 10.00 10.25 M12 12.00 12.25 Metric Fastener Hole Size(With Doweling Feature) Fastener…

  • Hole Size For Imperial Bolts

    Standardising hole sizes across engineering designs offers several important advantages: Imperial Fastener Hole Size(No Doweling Feature) Fastener Pin Diameter Hole Size Hole Tolerance Positional Tolerance #6 3.51 3.85 +/-0.05 0.2 #8 4.17 4.50 #10 4.83 5.15 1/4 6.35 6.65 5/16 7.94 8.25 3/8 9.53 9.85 1/2 12.70 13.00 Imperial Fastener Hole Size (with Doweling Feature)…

  • Fastener Groups; In-Plane Loading

    In-plane loading on a bolt occurs when forces are applied parallel to the plane in which the bolts lie. This contrasts with out-of-plane loading, where the forces are applied perpendicular to this plane. As a result of this, in the case of in-plane loading, the bolting group does not experience any bending loads. In-plane rotation of…

  • Fastener Groups; Flanged Bolt Couplings

    A flanged bolt coupling is a mechanical device used to connect two shafts together at their ends for the purpose of transmitting power. When connecting shafts using a flanged bolt coupling (like the example shown below) the torque load across the connected shafts generates a shear force in the bolts. In this application, it can…

  • Fastener Groups; Out-of-Plane Loading

    An out-of-plane load applied to a bracket will cause a simultaneous tensile and shear load to be applied to the bolts. The following equations will help size fasteners for respective load cases. Minimum edge distance for bolt holes should be 1.25D minimum Tensile force in each bolt Increasing Lx or decreasing Lz will result in…