Setobrick

LEGO part 3701: Technic Brick 1 x 4 [3 Pin Holes]

Technic Bricks22 colours1,467 sets

LEGO part LEGO part 3701: Technic Brick 1 x 4 [3 Pin Holes]

Specifications

Reference3701
CategoryTechnic Bricks
MaterialABS plastic
Colours22
Sets1,467
Listed pieces5,666
First appearance1995
Latest appearance2026
Element (Black)370126
Most common colourBlack
Main themesStar Wars, Ninjago, City
SetopediaData: Rebrickable
Spec sheet updated on 2026-09-29

LEGO part 3701, Technic Brick 1 x 4 [3 Pin Holes], belongs to the Technic Bricks category. It exists in 22 colours and appears in 1,467 sets of our database, from 1995 to 2026, for a total of 5,666 listed pieces. Its most common colour is Black.

Number 3701 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 370126.

Part 3701 through the years

The oldest set in our database that contains part 3701 is 6195 Neptune Discovery Lab, released in 1995 in the Aquazone theme. It is still in use: the most recent set featuring it, 75425 Mos Eisley Cantina, dates from 2026.

Its peak year is 2025, with 100 sets containing it. The set with the most copies is 9609 Technology Resource Set: 48 copies, against an average of 3.9 per set.

It is spread across several themes, led by Star Wars (16%), Ninjago (8%) and City (7%). With 1,467 sets, it ranks no. 107 of 2,731 parts in our database and no. 4 of 23 in the Technic Bricks category.

Sets containing part 3701, by period

PeriodSets
1995-199982
2000-2009286
2010-2019552
2020-2026547

Colours of part 3701

5 colours appear in only one set: medium nougat (11503 Flower Wall), dark turquoise (9732 Extreme Creatures), light aqua (11217 Brick-Built Bluey Family), bright pink (80009 Pigsy's Food Truck) and dark blue (75582 Brick-Built Gru and Minions).

Colour (element ID)SetsPiecesExample sets
Black3701264091,351717657177571769
Dark Bluish Gray4213607 · 370127308979103071030075337
Light Bluish Gray4211441278894753377104375347
White6601913 · 370101197638714114324910283
Red370121128365103004212842143
Reddish Brown4267994102346751922131875953
Tan4234365 · 370105101288764027621875288
Yellow37012489253714111027411021
Blue37012379236104976032476193
Light Gray3701024413710123848010019
Lime6132373 · 41665272165110196033860423
Magenta62821011124762154319741708
Green41077901022847997949793
Dark Green426049449725577827019
Dark Gray4124040315718684469754
Bright Light Blue638313634102984263921352
Dark Orange6618738 · 426306826112174884
Medium Nougat659490312411503
Dark Turquoise4118907 · 370128149732
Light Aqua66076641411217
Bright Pink62960421180009
Dark Blue65012141175582

Where to buy part 3701

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

Search part 3701 on AmazonPick a Brick (lego.com)BrickLink entryRebrickable entry

Sets that include part 3701

Sets ranked by popularity that include at least one part 3701, in any colour.

Often found with part 3701

Parts that share the most sets with part 3701, based on set inventories.

More parts in the Technic Bricks category

All parts in the Technic Bricks category

Frequently asked questions

How many LEGO sets include part 3701?

Part 3701 (Technic Brick 1 x 4 [3 Pin Holes]) appears in 1,467 sets listed on Setopedia, from 1995 to 2026, in any colour.

Which LEGO set contains the most copies of part 3701?

Set 9609 Technology Resource Set, released in 1995, contains 48 copies, the highest count in our database. On average, a set containing part 3701 has 3.9.

Which colours does LEGO part 3701 come in?

22 colours are listed for part 3701. The most common is Black, found in 409 sets.

What is the rarest colour of part 3701?

According to our inventories, it is bright pink, found in only 1 set (80009 Pigsy's Food Truck).

What is the element ID of part 3701 in black?

In black, part 3701 has element ID 370126. Number 3701 is the mould number, the same for every colour.

Is LEGO part 3701 still used in recent sets?

Yes: it appears in sets released in 2026, such as 75425 Mos Eisley Cantina.

Where can I buy LEGO part 3701 individually?

Single parts 3701 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.