ISO 12257:2008 PDF
Aerospace — Internal six-lobe drives — Metric series
Aerospace — Internal six-lobe drives — Metric series
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 2
- Дата публикации:
- 21 июля 2008 г.
- Издание:
- ISO IS 12257 edition 1 version 1
- ICS:
- 49.030.20
ISO 12257:2008 specifies the dimensions of metric internal six-lobe drives used in metric screws in nominal thread diameter range 3 mm to 20 mm.
Abstract
Overview
ISO 12257:2008 is an international standard published by the International Organization for Standardization (ISO) that specifies the dimensions for metric internal six-lobe drives commonly used in aerospace fastener systems. This standard applies to internal six-lobe (also known as Torx) drive profiles integrated into metric screws with nominal thread diameters ranging from 3 mm to 20 mm. The document ensures consistent geometric and dimensional characteristics for aerospace applications, promoting interchangeability and precision in manufacturing and assembly.
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