Heads

• Counter-sunk varieties

• Cylindrical varieties

• Externally Driven (eg: hex head)

Drive Types

• Cruciform varieties (eg: phillips, frearson)

• Hex (aka: alan) varieties

• Square varieties (eg: single, double, triple square)

• Slotted

• Tamper Resistant varieties

Threads

Standard threads included:

• ISO68 (standard for metric bolts)

• Triangular (eg: for woodscrews)

• Ball Screw

Any custom thread can be built by creating a profile as a Wire from within an object inheriting from the base Thread class. (read more here)

Male Fastener Components

• Bolts

• Screws

Female Fastener Components

• Nuts

Machine Screw

We can create a fastener with many tuned parameters, for this example we’ll create an M3 machine screw, 4mm long, with a domed cheese head, and a 2mm hex drive:

from cqparts_fasteners.male import MaleFastenerPart

screw = MaleFastenerPart(
    head=('cheese', {
        'diameter': 4.5,
        'height': 1.5,
        'domed': True,
        'dome_ratio': 0.5,
    }),
    drive=('hex', {
        'depth': 1,
        'width': 2,
    }),
    thread=('iso68', {
        'diameter': 3,  # M3
    }),
    length=4,
)

from cqparts.display import display
display(screw)

Catalogue Bolt

With use of a JSONCatalogue we can search for all fasteners within that catalogue that suit certain parameters, such as length, diameter, anything used as a parameter to build the part.

For this example, we’ll explicitly define the product’s id, guarenteeing only one result is returned:

import os

from cqparts.catalogue import JSONCatalogue
import cqparts_fasteners

catalogue_filename = os.path.join(
    os.path.dirname(cqparts_fasteners.__file__),
    'catalogue',
    'boltdepot-bolts.json',
)
catalogue = JSONCatalogue(catalogue_filename)
item = catalogue.get_query()
bolt = catalogue.get(item.id == '221')

from cqparts.display import display
display(bolt)

This should generate an accurate model for BoltDepot’s product #221.