---
publication_id: "OT-2026-000003437"
title: "Torque driving tool and retainer for driven member"
published_at: "2026-09-15T20:27:30.428561Z"
canonical_url: "https://opentechnical.org/p/OT-2026-000003437"
categories:
  - "tools-tooling/clamping-tools"
keywords:
  - "b25b15/005"
  - "b25b15/005"
  - "b25b15/00"
---

# Torque driving tool and retainer for driven member

## Abstract

A rotatable driving tool for imparting torque to a driven member, such as a threaded fastener having an axial recess in the head thereof, comprises a circularly cylindrical body with a plurality of substantially circularly helical driving portions projecting laterally therefrom and equiangularly spaced about the cylindrical axis, each of the driving portions having a small helix angle, preferably between one and three degress. The driving portions mate with lobes of the fastener recess but are slightly inclined with respect thereto to provide a wedge fit to retain the fastener in engagement with the tool body.

## 1. Drawings

[0001] Sheet 1.