Setobrick

LEGO part 3749: Technic Axle Pin without Friction Ridges Lengthwise

Technic Pins4 colours1,627 sets

LEGO part LEGO part 3749: Technic Axle Pin without Friction Ridges Lengthwise

Specifications

Reference3749
CategoryTechnic Pins
MaterialABS plastic
Colours4
Sets1,627
Listed pieces7,870
First appearance1995
Latest appearance2026
Element (Tan)4666579 · 4186017
Most common colourTan
Main themesTechnic, City, Star Wars
SetopediaData: Rebrickable
Spec sheet updated on 2026-09-29

LEGO part 3749, Technic Axle Pin without Friction Ridges Lengthwise, belongs to the Technic Pins category. It exists in 4 colours and appears in 1,627 sets of our database, from 1995 to 2026, for a total of 7,870 listed pieces. Its most common colour is Tan.

Number 3749 identifies the shape and is moulded under the part. Each colour also has its own element ID, the one Pick a Brick uses: in tan, it is 4666579.

Part 3749 through the years

The oldest set in our database that contains part 3749 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 122 sets containing it. The set with the most copies is 2000431 Connections Kit: 100 copies, against an average of 4.8 per set.

It is spread across several themes, led by Technic (19%), City (7%) and Star Wars (7%). With 1,627 sets, it ranks no. 95 of 2,731 parts in our database and no. 5 of 29 in the Technic Pins category.

Sets containing part 3749, by period

PeriodSets
1995-1999148
2000-2009397
2010-2019525
2020-2026557

Colours of part 3749

Its rarest colour, pearl titanium, appears only in set 76252 Batcave Shadowbox.

Colour (element ID)SetsPiecesExample sets
Tan4666579 · 41860171,3645,742103007533742128
Light Gray4184168 · 41541792612,097848084485571
Light Bluish Gray6485968 · 4211808729101517692276297
Pearl Titanium64453941276252

Where to buy part 3749

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

Search part 3749 on AmazonPick a Brick (lego.com)BrickLink entryRebrickable entry

Sets that include part 3749

Sets ranked by popularity that include at least one part 3749, in any colour.

Related parts

Often found with part 3749

Parts that share the most sets with part 3749, based on set inventories.

Minifigures using part 3749

Part 3749 is used in 2 catalogued minifigure variants. Characters:

More parts in the Technic Pins category

All parts in the Technic Pins category

Frequently asked questions

How many LEGO sets include part 3749?

Part 3749 (Technic Axle Pin without Friction Ridges Lengthwise) appears in 1,627 sets listed on Setopedia, from 1995 to 2026, in any colour.

Which LEGO set contains the most copies of part 3749?

Set 2000431 Connections Kit, released in 2013, contains 100 copies, the highest count in our database. On average, a set containing part 3749 has 4.8.

Which colours does LEGO part 3749 come in?

4 colours are listed for part 3749. The most common is Tan, found in 1,364 sets.

What is the rarest colour of part 3749?

According to our inventories, it is pearl titanium, found in only 1 set (76252 Batcave Shadowbox).

What is the element ID of part 3749 in tan?

In tan, part 3749 has element ID 4666579 or 4186017. Number 3749 is the mould number, the same for every colour.

Is LEGO part 3749 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 3749 individually?

Single parts 3749 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.