NA 027
DIN Standards Committee Optics and Precision Mechanics
DIN EN 250 [Withdrawn] references following documents:
| Document number | Edition | Title |
|---|---|---|
| EN 132 | 1998-12 | Respiratory protective devices - Definitions of terms and pictograms More |
| EN 148-2 | 1999-02 | Respiratory protective devices - Threads for facepieces - Part 2: Centre thread connection More |
| EN 148-3 | 1999-02 | Respiratory protective devices - Threads for facepieces - Part 3: Thread connection M 45×3 More |
| ISO 263 | 1973-04 | ISO inch screw threads; General plan and selection for screws, bolts and nuts; Diameter range 0,06 to 6 in More |
