ISO 4580-2021 PDF

Full title and description

ISO 4580:2021 — Aerospace — Drives, internal, TORX® PARALOBE® driver bit — Geometrical definition, gaging and technical requirements. This international standard defines the geometric dimensions, inspection (gaging) details and engineering requirements for TORX® PARALOBE® driver bits intended for use with aerospace fasteners.

Abstract

This document specifies basic dimensions, characteristics and engineering requirements for TORX® PARALOBE® driver bits used with aerospace fasteners, including metric and inch configurations, inspection gage definitions and torque test procedures.

General information

• Status: Published.
• Publication date: 2021-11-05.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 49.030.01 — Fasteners in general.
• Edition / version: Edition 1 (2021-11).
• Number of pages: 9.

Scope

The standard applies to TORX® PARALOBE® driver bits used with aerospace fasteners and specifies their basic geometric dimensions, designation, inspection (gaging) methods and torque test procedures to ensure correct fit and performance in aerospace applications.

Key topics and requirements

• Geometrical definition of driver bits (basic configuration, metric and inch dimensions, and driver bit designation).
• Driver bit inspection and gaging: definitions of inspection gage types and required gage dimensions and procedures for acceptance.
• Driver bit torque test: apparatus, torque test fixture requirements, torque wrench/torsion machine guidance and a defined torque test procedure to verify performance.
• Normative references and relationship to matching fastener-recess standards (ensures interchangeability and test correlation).
• Engineering requirements for manufacturing tolerances, marking/designation and quality checks for aerospace use.

Typical use and users

Used by aerospace fastener designers, driver-bit and tool manufacturers, quality and inspection laboratories, maintenance/repair organizations, procurement engineers and specification writers to ensure consistent driver-bit geometry, correct gaging/inspection and verified torque performance for aerospace hardware.

Related standards

ISO 4580:2021 is complementary to ISO 4579:2021 (which covers the matching TORX® PARALOBE® recess in aerospace fasteners); it also references common test methods such as NASM1312-25 for driving-recess torque testing. These related documents define the mating fastener recess and test correlations used with the driver-bit requirements.

Keywords

TORX PARALOBE, driver bit, aerospace fasteners, gaging, inspection, torque test, driver geometry, ISO 4580, fastener drive, driver designation.

FAQ

Q: What is this standard?

A: ISO 4580:2021 is an international standard that defines the geometrical dimensions, gaging (inspection) requirements and torque-test procedures for TORX® PARALOBE® driver bits used in aerospace applications.

Q: What does it cover?

A: It covers basic driver-bit configuration (metric and inch), driver-bit designation, inspection gage definitions and dimensions, and driver-bit torque test apparatus and procedures to verify performance.

Q: Who typically uses it?

A: Aerospace fastener designers, tool and driver-bit manufacturers, quality/inspection labs, aircraft maintenance and repair organizations, and procurement/specification teams.

Q: Is it current or superseded?

A: ISO 4580:2021 was published on 5 November 2021 and is the current edition published by ISO (status: Published). Users should check with their national standards body for any subsequent revisions or confirmations.

Q: Is it part of a series?

A: Yes — it is paired with the companion standard ISO 4579:2021 (which defines the TORX® PARALOBE® recess geometry and inspection for fasteners); both were prepared under ISO/TC 20/SC 4 for aerospace fastener systems.

Q: What are the key keywords?

A: TORX PARALOBE, driver bit, aerospace fasteners, gaging, inspection, torque test, geometric definition, ISO 4580, driver designation.