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Bits

Fastener assembly tool standards cover the tools, and their variable parts, that handle the fasteners during their installation. Given the variability within screwdrivers, starting from whether they are machine or hand operated, and continuing down all the way to the bits that actually make contact with the fastener, standardization promotes interchangeability between tools and parts of different manufacturers, and fasteners of yet a different manufacturer. These standards are related to the specifications of bits and their corresponding tools.

ISO 1173:2001

Assembly tools for screws and nuts -- Drive ends for hand- and machine-operated screwdriver bits and connecting parts -- Dimensions, torque testing

This International Standard specifies the dimensions and torque testing of drive ends for hand- and machine-operated screwdriver bits as well as to driving spindles of screw driving machines. It ensures the interchangeability of tool bits and tool holders. This International Standard defines only the distinctive features of individual drive ends. Details of design, e.g. of fixing devices, are left to the user of this International Standard.

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ISO 2351-1:2007

Assembly tools for screws and nuts - Machine-operated screwdriver bits - Part 1: Screwdriver bits for slotted head screws

ISO 2351-1:2007 prescribes the technical specifications for machine-operated screwdriver bits for slotted head screws. It applies to bits with male hexagon drive or with cylindrical flat end drive as defined in ISO 1173, and to tips for screwdrivers Type C as defined in ISO 2380-1. It also gives recommended combinations between tips and bits.

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ISO 2351-2:2002

Assembly tools for screws and nuts - Machine-operated screwdriver bits - Part 2: Screwdriver bits for cross-recessed head screws

ISO 2351-2 prescribes the technical specifications for machine-operated screwdriver bits for cross-recessed head screws. It applies to bits with male hexagon drive or with cylindrical flat end drive as defined in ISO 1173, and to tips for screwdrivers as defined in ISO 8764-1. It also gives recommended combinations between tips and bits.

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ISO 2351-3:2014

Assembly tools for screws and nuts - Machine-operated screwdriver bits - Part 3: Screwdriver bits for hexagon socket screws

ISO 2351-3:2014 prescribes the technical specifications for machine-operated screwdriver bits for hexagon socket screws, listed in ISO 1703 under reference number 3 2 03 01 0. It applies to bits with male hexagon drive or with cylindrical flat-end drive as defined in ISO 1173 and to tips for screwdrivers as defined in ISO 2936. It also gives recommended combinations between tips and bits.

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ISO 8764-1:2004

Assembly tools for screws and nuts - Screwdrivers for cross-recessed head screws - Part 1: Driver tips

ISO 8764-1:2004 specifies the shapes and dimensions, technical requirements and torque test methods for the tips of hand drivers and of machine-operated bits for cross-recessed head screws. It specifies two forms of driver tips: form PH for form H recesses and form PZ for form Z recesses. (H and Z form recesses are specified in ISO 4757, while general requirements, lengths of blades and marking of hand-operated screwdrivers are given in ISO 8764-2.)

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SAE AS 85643/2A-2013 (SAE AS85643/2A-2013)

BIT, SCREWDRIVER, PHILLIPS, RIBBED, CRUCIFORM, LONG SHANK, EXTERNAL HEXAGON SHANK, POWER DRIVEN (Stabilized: Sep 2013)

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SAE J 740-2011 (SAE J740-2011)

Countersunk Square Holes for Cutting Edges and End Bits ( Stabilized: Oct 2011 )

This document has been declared 'Stabilized' and will no longer be subjected to periodic reviews for currency. Users are responsible for verifying references and continued suitability or technical requirements. New technology may exist. To be used on cutting edges and end bits in conjunction with No. 3 head plow bolts (Ref. ANSI B18.9) typically used on off-road self-propelled work machines as described in SAE J1116. Cutting edges are further in SAE J737, J739 and J1304. End bits are further defined in SAE J63.

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