BS 7049 :1989 - British Standard Specifications for - Half- length centre grooved pins
Printed version of this is available at library. To request, please e-mail to referencepk@usm.my and include a copy of this record in your e-mail.
"This British Standard specifies the requirements for half-length centre grooved pins used in mechanical assemblies for locating, fastening, or securing components. The standard includes specifications for dimensions, tolerances, groove placement and geometry, materials, and mechanical properties to ensure reliable performance where reduced pin length and central groove placement are required."