LEGO part 99773: Technic Beam Triangle Thin [Type II]

LEGO part 99773, Technic Beam Triangle Thin [Type II], belongs to the Technic Beams category. It exists in 4 colours and appears in 145 sets of our database, from 2009 to 2026, for a total of 609 listed pieces. Its most common colour is Black.

Number 99773 identifies the shape and is moulded under the part. Each colour also has its own element ID, the one Pick a Brick uses: in black, it is 6331437.

Part 99773 through the years

The oldest set in our database that contains part 99773 is 9686 Simple and Motorized Mechanisms Base Set, released in 2009 in the Educational and Dacta theme. It is still in use: the most recent set featuring it, 42232 Koenigsegg Sadair's Spear Megacar, dates from 2026.

Its peak year is 2026, with 16 sets containing it. The set with the most copies is 42082 Rough Terrain Crane: 28 copies, against an average of 4.2 per set.

The part is closely tied to the Technic theme: 65% of the sets that contain it belong to it. With 145 sets, it ranks no. 889 of 2,731 parts in our database and no. 28 of 37 in the Technic Beams category.

Sets containing part 99773, by period