BS 1580-1:2007 Unified screw threads - Part 1: Screw threads with diameters ¼ in and larger. Requirements
- Abbreviation
- BS 1580-1:2007
- Valid from
- 31/12/2007
- Information provider
- British Standards Institution,
- Author
- British Standards Institution
- Information type
- British Standard,
- Format
- PDF, HARD COPY,
Description
BS 1580-1 specifies limits of sizes, and tolerances, for single-start, clearance-fit unified screw threads, in inch units, with nominal diameters in and above, having the ISO basic profile as specified in BS ISO 68-2:1998.
BS 1580-1specifies the following unified thread series as follows:
a) standard variable pitch series:
- a coarse thread series (UNC) from 1/4 in to 4 in nominal diameter
- a fine thread series (UNF) from 1/4 in to 1 1/2 in nominal diameter
- an extra fine thread series (UNEF) from 1/4 in to 1 1/16 in nominal diameter
b) standard constant pitch series:
- a 4-threads per inch series (4 UN) from 2 5/8 in to 6 in nominal diameter
- a 6-threads per inch series (6 UN) from 1 7/16 in to 6 in nominal diameter
- an 8-threads per inch series (8 UN) from 1 1/16 in to 6 in nominal diameter
- a 12-threads per inch series (12 UN) from 5/8 in to 6 in nominal diameter
- a 16-threads per inch series (16 UN) from 7/16 in to 6 in nominal diameter
- a 20-threads per inch series (20 UN) from 5/16 in to 3 in nominal diameter
- a 28-threads per inch series (28 UN) from 5/16 in to 1 1/2 in nominal diameter
- a 32-threads per inch series (32 UN) from 7/16 in to 1 in nominal diameter
c) a special thread series (UNS) with diameter/pitch combinations other than those specified for the standard series.
BS 1580-1 is intended for use with BS 919-1 and BS 919-4 which specify the corresponding screw gauges.
This resource is cited by:
BS 1580-1:2007 Unified screw threads - Part 1: Screw threads with diameters ¼ in and larger. Requirements
This document is CITED BY:
-
BS 10:2009
BS 1580-1:2007 is cited by BS 10:2009 Specification for flanges and bolting for pipes, valves and fittings