ISO 14278-2002 PDF

Full title and description

ISO 14278:2002 — Aerospace — Gauges, for internal offset cruciform ribbed or unribbed drives — Metric series. Specifies the dimensions and designations of metric gauges used to check internal offset cruciform drives (ribbed or unribbed) used in metric screws, covering nominal thread diameters from 1.6 mm to 20 mm.

Abstract

This International Standard defines the configuration, dimensions and tolerances for GO and NOT GO gauges that inspect internal offset cruciform (Phillips-style) drives, both ribbed and unribbed, in metric screw sizes. Dimensions and tolerances are given in millimetres and geometric tolerances are presented in accordance with ISO geometric tolerancing practice.

General information

• Status: Published (confirmed current following periodic review)
• Publication date: 2002-06 (June 2002)
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 49.030.20 (Bolts, screws, studs)
• Edition / version: Edition 1 (2002)
• Number of pages: 8

Scope

ISO 14278:2002 applies to metric gauges intended to check internal offset cruciform drives (ribbed or unribbed) used in metric screws with nominal thread diameters in the range 1.6 mm to 20 mm. It specifies gauge configuration, required dimensions, tolerances, and the designation system for GO and NOT GO gauges and assemblies used for drive-penetration checking.

Key topics and requirements

• Definitions and identification of internal offset cruciform drives (ribbed and unribbed).
• Dimensional specifications for GO and NOT GO gauges covering nominal sizes 1.6 mm to 20 mm.
• Configuration drawings for gauge bodies, plug/pin profiles and drive penetration gauge assemblies.
• Tolerancing expressed in millimetres; presentation of surface-profile, perpendicularity, location and run-out tolerances consistent with ISO geometric tolerancing practice.
• Designation rules for gauge parts and assembled gauges (naming/identification for GO / NOT GO).
• Notes on possible patent encumbrances affecting certain gauge elements (users should check intellectual property/licensing where applicable).

Typical use and users

This standard is used by aerospace manufacturers, fastener and gauge manufacturers, quality control and inspection departments, maintenance/repair/overhaul (MRO) organizations and calibration laboratories that produce, specify or use gauges to verify internal cruciform drive features on aerospace fasteners and components.

Related standards

Related standards and documents typically referenced together with ISO 14278 include ISO 14275 and ISO 14276 (standards that define the internal offset cruciform drive forms, ribbed and unribbed), ISO 1101 (geometric tolerancing presentation), and corresponding national/adopted versions such as BS ISO 14278:2002.

Keywords

aerospace; gauges; internal offset cruciform; cruciform drive; ribbed drive; unribbed drive; metric series; GO gauge; NOT GO gauge; fasteners; screws; inspection; ISO/TC 20/SC 4

FAQ

Q: What is this standard?

A: ISO 14278:2002 is an International Standard that specifies the dimensions and designation of metric gauges used to check internal offset cruciform drives (ribbed or unribbed) on screws in the metric size range 1.6 mm to 20 mm.

Q: What does it cover?

A: It covers gauge configuration, dimensional details for GO and NOT GO gauges, tolerances (in millimetres), and identification/designation rules for gauge parts and assembled drive-penetration gauges. Geometric tolerance presentation follows ISO practice.

Q: Who typically uses it?

A: Aerospace and fastener manufacturers, gauge and tooling suppliers, inspection and quality assurance teams, calibration laboratories, and MRO organizations involved in specifying or verifying cruciform (Phillips-style) internal drives on metric screws.

Q: Is it current or superseded?

A: The 2002 edition is the published edition. The standard has undergone periodic review and has been confirmed current following review cycles; users should verify with the standards body or their national standards organization for the absolute current status before purchase or formal citation.

Q: Is it part of a series?

A: Yes. ISO 14278 is part of a family of aerospace fastener standards addressing internal offset cruciform drives and gauges; associated documents include ISO 14275 and ISO 14276 which define the drive forms (ribbed and unribbed) and related aerospace fastener specifications.

Q: What are the key keywords?

A: aerospace, gauges, internal offset cruciform, ribbed, unribbed, metric, GO/NOT GO, fasteners, screws, inspection.