Secondary Operations for:

Index Drilling, Cross Drilling, Tapping and Drilling

Advanced Secondaries Inc.  has machines and tooling to drill most types of fasteners.  We work from prints, sketches, or samples.  Just tell us what you need and we'll do the rest.

Drilling a screw all the way through lengthwise makes it a vented screw.  Its purpose is to maintain atmospheric pressure constant within a device while keeping contaminants out.  Venting is applied to plugs as well as screws.

Drilling includes heads, shanks, blind, cross drilled, shank drilled and vented.

Safety wire or lockwire is common in the aircraft and racing industries as an extra precaution to keep vital fasteners from unintentionally loosening and part for falling off due to vibration or other forces. This function is often referred to as "positive locking".  It also allows rapid and easy visual inspection of fasteners to ensure that they have been tightened.

Safety Wiring of fasteners is often a requirement to pass technical safety inspections in racing.  Safety wire itself is available in multiple gauges and different materials, depending on the application.  In consumer aircraft and racing applications, stainless steel wire is used, most commonly in .032" diameter, although other gauges are used for specific circumstances.  Typically, safety wire is threaded through a hole drilled into a fastener or part, then twisted and anchored to a second fastener or part, then twisted again, usually with the aid of safety wire pliers.

  • Heads
  • Shanks
  • One Way
  • Cross Drilled
  • Shank Drilled
  • Vented