BS 949-3:1993

Superseded

View Superseded by

Screwing taps. Specification for pipe thread taps

Available format(s)

Hardcopy , PDF

Superseded date

31-03-2017

Language(s)

English

Published date

15-03-1993

Publisher

British Standards Institution

Committees responsible
Foreword
Specification
1. Scope
2. References
3. Right-hand and left-hand threads
4. Terminology of thread profiles
5. Types and sizes of taps
6. General dimensions
7. Dimensions and manufacturing tolerances for the
     threaded portion of taps for G series and Rp
     series threads
8. Dimensions of the threaded portion of taps for Rc
     series threads
9. Marking
Annex
A. (informative) Examples of the calculation of
     thread dimensions
Tables
1. Summary of the size designations of taps for pipe
     threads
2. General dimensions of taps for parallel pipe
     threads (G series and Rp series)
3. Dimensional tolerances on shanks and squares
4. Dimensional tolerances on length of thread and on
     overall lengths
5. General dimensions of taps for taper threads (Rc
     series)
6. Limits of tolerances
7. Dimensions and manufacturing tolerances for the
     threaded portion of taps for G series pipe threads
8. Dimensions and manufacturing tolerances for the
     threaded portion of taps for Rp series pipe threads
9. Dimensions of the threaded portion of taps for Rc
     series pipe threads
A.1 Calculation of the dimensions of the threaded
     portion of a G half ground-thread tap
A.2 Calculation of the dimensions of the threaded
     portion of an Rp half ground-thread tap
Figures
1. Thread profile of a nut with a G series thread
2. Thread profile of a tap for a G series thread
3. Thread profile of a nut with an Rp series thread
4. Thread profile of a tap for an Rp series thread
5. Thread profile of a nut with an Rc series thread
6. Thread profile of a tap for an Rc series thread
7. Tap for parallel pipe threads (G series and Rp
     series)
8. Tap for taper pipe threads (Rc series)
9. Nut and tap ptich diameter tolerances, G series
     threads
10. Nut and tap pitch diameter tolerances, Rp series
     threads
11. Threaded portion of tap for taper pipe threads
     (Rc series)
List of references

Specifies tolerances and dimensions for screwing taps for the following thread series: parallel internal pipe threads for use with taper external pipe threads in making pressure-tight joints on the threads; parallel internal pipe threads for use where pressure tight joints are not required to be made on the threads; taper internal pipe threads for use with taper external pipe threads in making pressure-tight joints on the threads. Also includes tables and diagrams.

Committee	W/-
DevelopmentNote	Supersedes BS 949-3(1982) Supersedes 90/79113 DC (10/2005) Reviewed and confirmed by BSI, December 2009. (11/2009)
DocumentType	Standard
Pages	20
PublisherName	British Standards Institution
Status	Superseded
SupersededBy	BS ISO 2284:2017
Supersedes	BS 949-3:1982

ISO 2857:1973	Ground thread taps for ISO metric threads of tolerances 4H to 8H and 4G to 6G coarse and fine pitches — Manufacturing tolerances on the threaded portion
ISO 2284:2017	Hand taps for parallel and taper pipe threads — General dimensions and marking
BS 4500-1.2(1990) : AMD 7631	ISO LIMITS AND FITS - GENERAL, TOLERANCES AND DEVIATIONS - TABLES OF COMMONLY USED TOLERANCE GRADES AND LIMIT DEVIATIONS FOR HOLES AND SHAFTS
ISO 5967:1981	Taps and thread cutting Nomenclature of the main types and terminology
BS 949-5:1990	Screwing taps Nomenclature and terminology

View more information

€155.16

Excluding VAT

Product format

I agree to the DRM document license rules apply against the PDF selection made.

Please confirm that you agree to the document license rules for this document.

I agree to the document license rules .

Please confirm that you agree to the document license rules for this document.

Access your standards online with a subscription

Features

Simple online access to standards, technical information and regulations.
Critical updates of standards and customisable alerts and notifications.
Multi-user online standards collection: secure, flexible and cost effective.

Get in touch with us

BS 949-3:1993

Screwing taps. Specification for pipe thread taps

Table of Contents

Abstract

General Product Information

Standards Referencing This Book

Category

Subcategory