ISO 7721-2
Countersunk flat head screws – Part 2: Penetration depth of cross recesses
English
1990
0.000
Detailed Information
This part of ISO 7721 specifies the penetration depth of cross recesses of countersunk flat head screws for the two series 1 and 2 (deep and shallow, respectively).
Download File
(Log in to download spec.)
Check out other specifications
1966
English
Spring Washers with Safety Ring
The surface of the spring washer and of the safety ring must be smooth and free from scale and burr. The spring washers must be coiled with constant pitch and without any kinks (with the exception of the barbing of the ends). The ends of the spring washer which bite into the parent mater […]
1970
English
ISO MINIATURE SCREW THREADS
This ISO Recommendation specifies ISO miniature screw threads with thread sizes from 0.3 to 1.4 mm diameter. For technological and functional reasons the tolerancing system for these threads differs from the tolerancing system for ISO general purpose metric screw threads.
2013
English
Standard Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems
This practice covers recommendations and precautions for cleaning, descaling, and passivating of new stainless steel parts, assemblies, equipment, and installed systems. These recommendations are presented as procedures for guidance when it is recognized that for a particular service it i […]
2008
English
UNIFIED INCH SCREW THREADS (UN AND UNR THREAD FORM)
This Standard specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads. (In order to emphasize that unified screw threads are based on inch modules, they may be denoted unified inch screw threads.) Several variations in thread form have bee […]
2000
English
ZINC COATING (HOT-DIP) ON IRON AND STEEL HARDWARE
1.1 This specification covers zinc coatings applied by the hot-dip process on iron and steel hardware. 1.2 This document is intended to be applicable to hardware items that are centrifuged or otherwise handled to remove excess galvanizing bath metal (free zinc). Coating thickness grade re […]