BS EN ISO 225 : 2010 standard is for asteners — Bolts, screws, studs and nuts — Symbols and descriptions of dimensions.
ISO 225 Standard defines the symbols and gives descriptions of the dimensions of bolts, screws, studs and nuts for use in the appropriate product standards and drawings.
Product types of ISO 225 Standard as follow:
Bolts, screws and studs
Hexagon head products
Hexagon head bolts and screws.
Hexagon head bolts and screws with flange.
Hexagon socket head screws
Cylindrical head
Countersunk head
Button head.
Hexalobular socket head screws.
Cylindrical head
Cheese head
Pan head
Raised countersunk head
Triple square socket head screws
Cylindrical head
Cylindrical head with flange
Raised countersunk head
Cup head square neck bolts
Slotted and cross-recessed head screws
Studs
Set screws.
Headless screws with shank
Ends of parts with external thread (points)
Thread rolling (thread forming) screws
Thread cutting screws
Tapping screws
Drilling screws with tapping screw thread
Nuts
Hexagon nuts
Prevailing torque type nuts
Slotted and castle nuts
The following referenced documents are indispensable for the application of this document.
ISO 3508, Thread run-outs for fasteners with thread in accordance with ISO 261 and ISO 262
ISO 4753, Fasteners — Ends of parts with external ISO metric thread
ISO 4755, Fasteners — Thread undercuts for external metric ISO threads
ISO 4757, Cross recesses for screws
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