ISO 13921:2008

Aerospace — Screws, 100 degrees reduced countersunk head, internal offset cruciform ribbed or unribbed drive, normal shank, short or medium length MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa — Dimensions

Publication date: Aug 18, 2008

General information

Current stage: 90.93 Effective date: Nov 21, 2025

Originator: ISO

Owner: ISO/TC 20/SC 4

Type: International Standard

ICS: 49.030.20

Languages: English

Buying

Status: Published

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CD - ALL 4,975

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Scope

ISO 13921:2008 specifies the dimensions of 100° reduced countersunk head screws with internal offset cruciform ribbed or unribbed drive, with close or large tolerance normal shank and short or medium length MJ threads, in metallic material, coated or uncoated, with strength classes less than or equal to 1 100 MPa.
ISO 13921:2008 is applicable to the compilation of aerospace product standards.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 13921:1996

NOW

PUBLISHED
ISO 13921:2008
90.93 Standard confirmed
Nov 21, 2025

REVISED BY

ABANDON
ISO/CD 13921