Overview
This British Standard specifies the limits of size for the following types of gauges, setting plugs and check plugs for the various classes of standard Unified Coarse (UNC), Unified Fine (UNF) and Unified Extra Fine (UNEF) threads specified in BS 1580-1:
a) GO and NOT GO screw gauges
b) Setting plugs for GO and NOT GO adjustable screw ring gauges and for GO and NOT GO adjustable screw calliper gauges
c) GO and NOT GO check plugs for solid screw ring gauges
d) GO and NOT GO plug gauges and GO and NOT GO calliper gauges for the crest diameters of product threads.
BS 919-4 contains:
Section 1: Unified coarse threads, UNC 2
Section 2: Unified fine threads, UNF 25
Section 3: Unified extra fine threads, UNEF
This part of BS 919 supersedes BS 919-4:1964, which is withdrawn.
Bibliographic Detail
| Standard Number | BS 919-4:2007 |
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| Title | Screw gauge limits and tolerances. Limits of size for gauges for screw threads of unified form diameters ¼ in and larger |
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| Status | Current |
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| Publication Date | 31 October 2007 |
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| Cross References | BS 919-1, BS 1580-1, BS 6528:1984 |
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| Replaces | BS 919-4:1964 |
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| Draft Superseded | 07/30158519 DC |
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| Descriptors | Thread gauges, Linear measuring instruments, Unified screw threads, Thread forms, Diameter, Diameter measurement, Dimensions, Ring gauges, Plug gauges, Calipers (instruments), Dimensional tolerances, Fits, Setting gauges |
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| ICS | 21.040.10 (Metric screw threads)
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| Title in French | Limites et tolerances des calibres de vis. Specification. Limites dimensionnelles pour calibres de filetages de diametres ¼ in et plus de forme Unified |
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| Title in German | Grenzwerte und Toleranzen von Gewindelehren. Spezifikation. Groessenbegrenzungen fuer Lehren fuer UST-Schraubgewinde mit Durchmessern von ¼ Zoll und groesser |
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| Committee | TDW/4 |
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| ISBN | 978 0 580 57936 3 |
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| Publisher | BSI |
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| Format | A4 |
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| Delivery | YES |
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| Pages | 70 |
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| File Size | 517 KB |
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| Price | £ 142.00 |
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