We noticed you’re not on the correct regional site. Switch to our AMERICAS site for the best experience.
  • BS 949-2(1979) : 1979

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
    Add to Watchlist
    This Standard has been added successfully to your Watchlist
    Please visit My Watchlist to see all standards that you are watching.
    Please log in or to add this standard to your Watchlist.
    We could not add this standard to your Watchlist.
    Please retry or contact support for assistance.
    We could not add this standard to your Watchlist.
    Please retry or contact support for assistance.
    You have already added this standard to your Watchlist.
    Visit My Watchlist to view the full list.

    SCREWING TAPS - TAPS FOR UNIFIED THREADS (AND FOR THE OBSOLESCENT THREADS OF WHITWORTH AND BA FORMS)

    Available format(s):  Hardcopy, PDF

    Superseded date:  15-12-1992

    Language(s):  English

    Published date:  01-01-1979

    Publisher:  British Standards Institution

    Add to Watchlist

    Add To Cart

    Abstract - (Show below) - (Hide below)

    Gives dimensions and tolerances for screwing taps for following threads: unified (ISO inch) coarse thread series (UNC), from no. 1 to no. 12 and from 1/4 in to 4 in diameter in accordance with BS1580. Unified (ISO inch) fine thread series (UNF), from no. 0 to no. 12 and from 1/4 in to 1 1/2 in diameter in accordance with BS 1580. British Standard Whitworth threads from 1/8 in to 4 in diameter and British Standard Fine (BSF) threads from 1/16 in to 3 in diameter in accordance with BS 84 and British Association threads from no. 14 to no. 0 in accordance with BS 93.

    General Product Information - (Show below) - (Hide below)

    Committee MTE/4
    Document Type Standard
    Publisher British Standards Institution
    Status Superseded
    Superseded By
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    BS 949-3(1982) : 1982 SCREWING TAPS - SPECIFICATION FOR TAPS FOR PIPE THREADS (G SERIES, Rp SERIES AND Rc SERIES)
    BS 949-4(1990) : 1990 SCREWING TAPS - SPECIFICATION FOR METRIC GROUND THREAD TAPS: MANUFACTURING TOLERANCES

    Standards Referencing This Book - (Show below) - (Hide below)

    BS 949-1(1976) : 1976 SCREWING TAPS - SPECIFICATION FOR TAPS FOR ISO METRIC THREADS
    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
    BS 1580-3(1965) : 1965 SPECIFICATION FOR UNIFIED SCREW THREADS - DIAMETERS BELOW 1/4 IN AND LARGER
    ISO 529:2017 Short machine taps and hand taps
    ISO 237:1975 Rotating tools with parallel shanks Diameters of shanks and sizes of driving squares
    BS 1580-1&2(1962) : 1962 SPECIFICATION FOR UNIFIED SCREW THREADS - DIAMETERS 1/4 INCH AND LARGER
    • 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, flexibile and cost effective