MACHOS ROSCAS ESPECIALES
rosca
material
DIN
forma
FIGURA
WITHWORTH-BSW
HSS-WS
352
HSS E
376
C
371
B
Hélice 35º
357
Tuerquero
BSF
BSP
5157
5156
UNC
HSS
UNF-SAE
BSPT
374
UNEF
BA
PG
2181
NPT