The 1421C is an 8-32 knurled thumb nut from the 1421C Series, supplied as a set of 4 nuts. The series describes these as decorative thumb nuts, constructed of aluminum with a knurled outside surface, for builders of small electronic cases and other equipment who want a thumb nut or knob-style nut on 8-32 hardware.

Each nut has a head diameter of 0.64 in (16 mm) and a head height of 0.45 in (11 mm). The set of 4 has a shipping weight of 0.04 lbs (0.02 kg).

• 8-32 thread size
• Aluminum construction
• Knurled outside surface
• Decorative thumb nut styling
• 4 nuts included

The manufacturer's part page lists the 1421C under the Hardware product category with the type Screws, and its short description reads knurled aluminum thumb screw. The series specification sheet names the part an 8-32 knurled thumb nut and tags it as a thumb nut and knob, so buyers may find it under any of these names.

The 1421C is RoHS compliant and REACH compliant. It is listed in the small-case accessories range alongside other enclosure hardware, and it is the only part number in the 1421C Series, so the 1421C is the part to order whenever you need this 8-32 aluminum thumb nut, sold in a set of 4.