• BS 1580:PARTS 1+AND 2:1962

BS 1580:PARTS 1+AND 2:1962

Specification for Unified screw threads-Diameters ¼ in and larger

BSI Group , 09/15/1962

Publisher: BS

File Format: PDF

$199.00$398.78


Unified coarse thread series UNC ¼ in to 4 in diameter; Unified fine thread series UNF ¼ in to 1½ in; Unified extra fine thread series UNEF ¼ in to 1 11/16 in. Standard constant pitch series for a graduated system of diameter/pitch combinations. Basic and design forms. Tables of basic dimensions, limits and tolerances for all diameter/pitch combinations in UNC, UNF, UNEF and standard constant pitch series given for the three classes of internal and external threads. Bases of tolerances for Unified screw threads; five sizes below ¼ in diameter for attachment purposes and for general use in aircraft appended. Evolved through international discussions between UK, Canada, USA. In accord with corresponding sections of American standard ASA B1.1-1960.

BS 1580:PARTS 1+AND 2:1962 History

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