OPENTECHNICAL PUBLICATION
OT-2026-000003176

Spiral drive system for threaded fasteners

Published: 2026-09-15T19:44:12.962458Z
Permanent URL: https://opentechnical.org/p/OT-2026-000003176
Categories: Tools & Tooling > Clamping Tools

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ABSTRACT

A spiral drive system for threaded fasteners includes driver-engageable
surfaces on the head end of the fastener in which at least some of the
driver-engageable surfaces are defined by a spiral segment configured to
maximize torque transmission while spreading the driving load over a broad
driver-fastener interface to reduce the risk of development of high stress
regions. Drivers and related tooling also are disclosed.

1. Drawings

[0001] Sheet 1.

[0002] Sheet 2.

[0003] Sheet 3.

[0004] Sheet 4.

[0005] Sheet 5.

[0006] Sheet 6.

[0007] Sheet 7.

[0008] Sheet 8.

[0009] Sheet 9.

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OpenTechnical publication OT-2026-000003176
Published 2026-09-15T19:44:12.962458Z
https://opentechnical.org/p/OT-2026-000003176