Torque-tension test requeriments for prevailing-torque type steel metric hex nuts and hex flange nuts - American National Standards Institute (New York, New York : American Society of Mechanical Engineers, 1980)
Contenido: ANSI B18.16.2-M-1979.
A la cabeza de la portada: American National Standard.
Keywords: PERNOS Y TUERCAS; NORMAS; ROSCAS