20/30423719 DC - BS ISO 965-4. ISO general purpose metric screw threads. Tolerances. Part 4. Limits of sizes for hot-dip galvanized external screw threads to mate with internal screw threads tapped with tolerance position H or G after galvanizing

20/30423719 DC

BS ISO 965-4. ISO general purpose metric screw threads. Tolerances. Part 4. Limits of sizes for hot-dip galvanized external screw threads to mate with internal screw threads tapped with tolerance position H or G after galvanizing

Status : Current, Draft for public comment   Published : September 2020

Format
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This part of document specifies limit deviations and limits of sizes for the pitch and crest diameters of the hot-dip galvanized metric external screw threads conforming to the coarse thread series of ISO 262 (from M10 to M64) having a basic profile according to ISO 68-1.

This part of document is applicable to the hot-dip galvanized metric external screw threads to mate with the internal screw threads tapped with tolerance position H or G after galvanizing.

Products made with thread tolerances in accordance with ISO 965-4 may show failure at lower ultimate tensile loads than those specified in ISO 898-1 due to reduction of the stress area.

External screw threads with thread tolerances according to ISO 965-4 must not be mated with internal screw threads with thread tolerances according to ISO 965-5 because such combinations will create severe risk for thread stripping.

NOTE

After the hot-dip galvanization the external threaded products with the tolerance class 6az shall be centrifuged immediately.




Standard Number20/30423719 DC
TitleBS ISO 965-4. ISO general purpose metric screw threads. Tolerances. Part 4. Limits of sizes for hot-dip galvanized external screw threads to mate with internal screw threads tapped with tolerance position H or G after galvanizing
StatusCurrent, Draft for public comment
Publication Date22 September 2020
Normative References(Required to achieve compliance to this standard)ISO 965-1, ISO 5408
Informative References(Provided for Information)ISO 68-1, ISO 985-5, ISO 898-1, ISO 262
International RelationshipsISO/DIS 965-4
Draft Expiry Date15 November 2020
DescriptorsISO metric threads, Dimensional tolerances, Threaded fasteners, Length, Standard deviation, Metal coatings, External threads, Threads, Thread pitch, Size, Dimensions, Radius, Hot-dip galvanizing, Diameter, Thread forms
ICS21.040.10
Title in FrenchTitre manque Partie 4: Dimensions limites pour filetages extérieurs galvanisés à chaud pour assemblages avec des filetages intérieurs de position de tolérance H ou G après galvanisation
CommitteeFME/9
PublisherBSI
FormatA4
DeliveryYes
Pages10
File Size260 KB
NotesWarning: this draft is not current beyond its expiry date for comments.
Price£20.00


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