Setobrick

LEGO part 43857: Technic Beam 1 x 2 Thick

Technic Beams15 colours416 sets

LEGO part LEGO part 43857: Technic Beam 1 x 2 Thick

Specifications

Reference43857
CategoryTechnic Beams
MaterialABS plastic
Colours15
Sets416
Listed pieces1,615
First appearance2002
Latest appearance2026
Element (Black)4385726 · 4177444
Most common colourBlack
SetopediaData: Rebrickable
Spec sheet updated on 2026-09-29

LEGO part 43857, Technic Beam 1 x 2 Thick, belongs to the Technic Beams category. It exists in 15 colours and appears in 416 sets of our database, from 2002 to 2026, for a total of 1,615 listed pieces. Its most common colour is Black.

Number 43857 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 4385726.

Part 43857 through the years

The oldest set in our database that contains part 43857 is 3809 Technojaw T55, released in 2002 in the Spybotics theme. It is still in use: the most recent set featuring it, 11377 The Lord of the Rings: Minas Tirith, dates from 2026.

Its peak year is 2026, with 42 sets containing it. The set with the most copies is 42131 Cat D11 Bulldozer: 46 copies, against an average of 3.9 per set.

It is spread across several themes, led by Technic (37%), Star Wars (14%) and FIRST LEGO League (5%). With 416 sets, it ranks no. 408 of 2,731 parts in our database and no. 15 of 37 in the Technic Beams category.

Sets containing part 43857, by period

PeriodSets
2002-200985
2010-2019159
2020-2026172

Colours of part 43857

5 colours appear in only one set: orange (42227 Jeep Wrangler Rubicon SUV), pearl dark gray (8434 Aircraft), brown (4481 Hailfire Droid), dark azure (42162 Bugatti Bolide Agile Blue) and yellowish green (42208 Aston Martin Valkyrie).

Colour (element ID)SetsPiecesExample sets
Black4385726 · 4177444155514421434212342175
Light Bluish Gray4211862112331421464212775252
Red418566478246421434214542144
Yellow418712262247421284217542130
Blue6057802 · 41856652594421414214042115
White6215107 · 42276952550103004217575288
Dark Bluish Gray6325983 · 61796311849421754215675348
Lime6149993 · 4263119133242154421024958
Bright Green6316318828421291029576405
Light Gray419527221074718366
Orange6593823 · 42413801642227
Pearl Dark Gray4227476138434
Brown4205832124481
Dark Azure64439101242162
Yellowish Green65533431142208

Where to buy part 43857

Setopedia shows no prices: they vary by colour, condition and seller. Amazon links are affiliate links.

Search part 43857 on AmazonPick a Brick (lego.com)BrickLink entryRebrickable entry

Sets that include part 43857

Sets ranked by popularity that include at least one part 43857, in any colour.

Often found with part 43857

Parts that share the most sets with part 43857, based on set inventories.

More parts in the Technic Beams category

All parts in the Technic Beams category

Frequently asked questions

How many LEGO sets include part 43857?

Part 43857 (Technic Beam 1 x 2 Thick) appears in 416 sets listed on Setopedia, from 2002 to 2026, in any colour.

Which LEGO set contains the most copies of part 43857?

Set 42131 Cat D11 Bulldozer, released in 2021, contains 46 copies, the highest count in our database. On average, a set containing part 43857 has 3.9.

Which colours does LEGO part 43857 come in?

15 colours are listed for part 43857. The most common is Black, found in 155 sets.

What is the rarest colour of part 43857?

According to our inventories, it is yellowish green, found in only 1 set (42208 Aston Martin Valkyrie).

What is the element ID of part 43857 in black?

In black, part 43857 has element ID 4385726 or 4177444. Number 43857 is the mould number, the same for every colour.

Is LEGO part 43857 still used in recent sets?

Yes: it appears in sets released in 2026, such as 11377 The Lord of the Rings: Minas Tirith.

Where can I buy LEGO part 43857 individually?

Single parts 43857 can be ordered on Pick a Brick (lego.com) in colours currently produced, or on BrickLink for older colours. The part is also included in the sets listed on this page.