Many tests involving the Spiralock (Detroit Tap & Tool) thread form showed that such threads had the capability to increase a bolt's holding power to prevent loosening, but no one had been quite sure why this was so. A recent MIT study that throws some light on the subject is discussed here. Performed for a major automobile manufacturer, the study shows that a simple change in the female thread can improve locking, as compared with that achieved by the standard 60-deg screw thread. The Spiralock thread is a modified female form that mates with a standard male bolt or screw to produce a self-locking assembly.

  • Corporate Authors:

    Morgan-Grampian, Incorporated

    16 West 61st Street
    New York, NY  United States  10023
  • Authors:
    • Yeaple, F
  • Publication Date: 1978-12

Media Info

  • Pagination: p. 61-62
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00195248
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Aug 28 1979 12:00AM