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Rule out the usual hiding places first. If the piece really is gone, check the set piece by piece and leave with the element ID LEGO asks for, or a link to buy the part.

The Nether Fortress

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21122 The Nether Fortress

545 pieces in 123 part and color combinations, plus 4 minifigures.

The official piece count includes the 26 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.

Before you call it missing

Builders who report a missing piece often find it in one of these places. Tick each one off as you look.

Look-alike colors in this set

These parts appear in this set in two colors that are easy to confuse. If you are one short in one color, check whether it went in where the other color belongs. Each color has its own element ID in the parts list at the back of the instructions.

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Piece checklist

Bricks 220 pieces

  • Brick 2 x 2 Corner Black Part 2357 Element 235776 or 235726 ×10
  • Brick 2 x 8 Black Part 3007 Element 6037390 or 300726 ×2
  • Brick 1 x 2 Dark Brown Part 3004 Element 6058257 or 4623774 ×10
  • Brick 1 x 1 Dark Red Part 3005 Element 4541376 or 4209383 ×20
  • Brick 1 x 2 Dark Red Part 3004 Element 4539102 or 4163454 ×16
  • Brick 1 x 6 Dark Red Part 3009 Element 4541528 or 4223789 ×10
  • Brick 2 x 2 Dark Red Part 3003 Element 4539104 or 4249850 ×76
  • Brick 2 x 4 Dark Red Part 3001 Element 6117418 or 6057588 ×15
  • Brick 2 x 6 Dark Red Part 2456 Element 6089268 or 4496339 ×5
  • Brick 2 x 8 Dark Red Part 3007 Element 6089263 or 4496340 ×7
  • Brick 1 x 2 Light Bluish Gray Part 3004 Element 4211388 ×3
  • Brick 2 x 2 Light Bluish Gray Part 3003 Element 4211387 ×7
  • Brick 2 x 2 Corner Light Bluish Gray Part 2357 Element 4211349 ×1
  • Brick 2 x 4 Light Bluish Gray Part 3001 Element 4211385 ×14
  • Brick 2 x 6 Light Bluish Gray Part 2456 Element 4274668 or 4211795 ×3
  • Brick 1 x 1 Orange Part 3005 Element 4173805 or 4119645 Also in Trans-Orange ×3
  • Brick 1 x 2 Orange Part 3004 Element 4613981 or 4121739 ×3
  • Brick 2 x 2 Orange Part 3003 Element 4153825 or 4119643 ×8
  • Brick 2 x 2 Tan Part 3003 Element 4114306 or 300305 ×2
  • Brick 2 x 4 Tan Part 3001 Element 4114319 or 300105 ×1
  • Brick 1 x 1 Trans-Orange Part 3005 Element 6514209 or 6240550 Also in Orange ×3
  • Brick 1 x 2 White Part 3004 Element 6548257 or 4613964 ×1

Plates 119 pieces

  • Plate 1 x 1 Black Part 3024 Element 302426 ×6
  • Plate 1 x 2 Black Part 3023 Element 302326 ×3
  • Plate 1 x 8 Black Part 3460 Element 346026 ×1
  • Plate 8 x 16 Dark Brown Part 92438 Element 6447573 or 6120800 ×1
  • Plate 1 x 1 Dark Red Part 3024 Element 4539114 or 4183901 ×16
  • Plate 1 x 2 Dark Red Part 3023 Element 4539097 or 4162582 ×2
  • Plate 1 x 4 Dark Red Part 3710 Element 4539061 or 4164219 ×8
  • Plate 2 x 12 Dark Red Part 2445 Element 6544174 or 6009130 ×5
  • Plate 2 x 2 Dark Red Part 3022 Element 4585479 or 4163160 ×3
  • Plate 6 x 8 Dark Red Part 3036 Element 6028115 ×3
  • Plate 1 x 1 Dark Tan Part 3024 Element 4549436 or 4497084 ×4
  • Plate 1 x 2 Light Bluish Gray Part 3023 Element 4211398 or 3023194 ×2
  • Plate 1 x 4 Light Bluish Gray Part 3710 Element 4211445 ×6
  • Plate 2 x 2 Light Bluish Gray Part 3022 Element 4211397 ×2
  • Plate 2 x 6 Light Bluish Gray Part 3795 Element 4211452 or 3795194 ×1
  • Plate 8 x 16 Light Bluish Gray Part 92438 Element 4598522 ×1
  • Plate 8 x 8 Light Bluish Gray Part 41539 Element 4166618 ×1
  • Plate 2 x 2 Olive Green Part 3022 Element 6079617 ×4
  • Plate 6 x 10 Orange Part 3033 Element 6034497 or 4505159 ×2
  • Plate 6 x 6 Orange Part 3958 Element 6052391 ×1
  • Plate 1 x 1 Red Part 3024 Element 302421 ×6
  • Plate 2 x 8 Tan Part 3034 Element 4113988 or 303405 ×1
  • Plate 1 x 1 Trans-Orange Part 3024 Element 6513961 or 6252040 ×5
  • Plate 1 x 2 Trans-Orange Part 3023 Element 6514005 or 6240217 ×3
  • Plate 1 x 1 Trans-Yellow Part 3024 Element 6513966 or 6252045 ×10
  • Plate 1 x 2 Trans-Yellow Part 3023 Element 6514002 or 6240211 ×6
  • Plate 1 x 1 White Part 3024 Element 6548262 or 302401 ×4
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×3
  • Plate 1 x 4 White Part 3710 Element 6552108 or 6548266 ×4
  • Plate 2 x 2 White Part 3022 Element 6552099 or 6548260 ×3
  • Plate 4 x 4 White Part 3031 Element 6552127 or 4243812 ×1
  • Plate 2 x 2 Corner Yellow Part 2420 Element 242074 or 242024 ×1

Plates Special 45 pieces

  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Black Part 15573 Element 6092585 ×3
  • Plate Special 1 x 2 with Pin Hole on Top Dark Bluish Gray Part 11458 Element 6019987 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Dark Red Part 15573 Element 6092597 ×4
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Dark Red Part 87580 Element 4613761 ×15
  • Bracket 1 x 2 - 2 x 2 Light Bluish Gray Part 44728 Element 6117967 or 6009014 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove (Jumper) Light Bluish Gray Part 3794b ×2
  • Plate Special 1 x 2 with Handles on Ends Light Bluish Gray Part 18649 Element 6093058 ×4
  • Plate Special 1 x 2 with Pin Hole Underneath Light Bluish Gray Part 18677 Element 6168633 or 6089147 ×1
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Light Bluish Gray Part 87580 Element 6126082 or 4565393 ×2
  • Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Solid Anti-stud] Light Bluish Gray Part 99206 Element 4654577 ×2
  • Bracket 1 x 2 - 2 x 2 Inverted Red Part 99207 Element 6001806 ×1
  • Plate Special 1 x 2 with Clip Horizontal on End White Part 63868 Element 6361170 or 4535737 ×8
  • Plate Special 1 x 2 with Door Rail Yellow Part 32028 Element 4141630 ×1

Plates Round Curved and Dishes 43 pieces

  • Plate Round 1 x 1 with Open Stud Black Part 85861 Element 6168646 or 6100627 ×4
  • Plate Round 1 x 1 with Solid Stud Dark Purple Part 6141 Element 4566522 ×9
  • Plate Round 1 x 1 with Solid Stud Glow in Dark White Part 6141 Element 6351958 or 6238048 ×8
  • Plate Round 1 x 1 with Solid Stud Light Bluish Gray Part 6141 Element 4211525 ×4
  • Plate Round 1 x 1 with Solid Stud Medium Azure Part 6141 Element 6102986 ×2
  • Plate Round 1 x 1 with Solid Stud Red Part 6141 Element 614121 Also in Trans-Red ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 Also in Red ×2
  • Plate Round 1 x 1 with Solid Stud White Part 6141 Element 6601919 or 614101 ×12
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) White Part 4032a Element 6601914 or 403201 ×1

Tiles 35 pieces

  • Tile 1 x 4 with Groove Black Part 2431 Element 243126 ×1
  • Tile 2 x 2 with Groove Black Part 3068b Element 306826 ×4
  • Tile 1 x 1 with Groove Dark Red Part 3070b Element 4550169 or 4187196 ×4
  • Tile 1 x 2 with Groove Dark Red Part 3069b Element 4539090 or 4529548 ×1
  • Tile 1 x 4 with Groove Dark Red Part 2431 Element 4539060 or 4164220 ×5
  • Tile 2 x 2 with Groove Light Bluish Gray Part 3068b Element 4211413 ×3
  • Tile 1 x 2 with Groove White Part 3069b Element 6548264 or 306901 ×5
  • Tile 1 x 4 with Groove White Part 2431 Element 6548255 or 243101 ×2
  • Tile 2 x 2 with Groove White Part 3068b Element 6548263 or 306801 ×1
  • Tile 2 x 4 with Groove White Part 87079 Element 6548271 or 4560178 ×6
  • Tile 2 x 4 with Pixelaed Minecraft Ghast Closed Eyes Print White Part 87079pr0078 Element 6121923 ×1
  • Tile 2 x 4 with Pixelated for Minecraft Ghast Mouth Print White Part 87079pr0079 Element 6121926 ×1
  • Tile 2 x 4 with Pixelated for Minecraft Ghast Open Eyes with 2 Red Squares Print White Part 87079pr0068 Element 6112866 ×1

Bricks Special 33 pieces

  • Brick Special 1 x 2 with Studs on 2 Sides Black Part 52107 Element 4253815 ×4
  • Brick Special 1 x 2 with Groove Dark Red Part 4216 Element 6070691 ×7
  • Brick Special 1 x 2 with Masonry Brick Profile Dark Red Part 98283 Element 6093908 ×10
  • Brick Special 1 x 2 with 2 Studs on 1 Side Light Bluish Gray Part 11211 Element 6015344 ×4
  • Brick Special 1 x 1 with Stud on 1 Side White Part 87087 Element 6550190 or 4558952 ×6
  • Brick Special 1 x 4 with 4 Studs on One Side White Part 30414 Element 6550167 or 4143254 ×2

Bricks Sloped 17 pieces

  • Brick Sloped 30° 1 x 2 x 2/3 Black Part 85984 Element 4548180 ×3
  • Brick Sloped 45° 2 x 2 Orange Part 3039 Element 4118828 ×4
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Trans-Orange Part 54200 Element 6245265 or 4244369 ×6
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) White Part 54200 Element 6550179 or 4504369 ×4

Bricks Round and Cones 7 pieces

  • Cone 1 x 1 [Top Groove] Red Part 59900 Element 4529234 ×1
  • Cone 1 x 1 [Top Groove] Trans-Orange Part 59900 Element 6514017 or 6172233 ×6

Hinges, Arms and Turntables 4 pieces

  • Hinge Brick 1 x 4 [Lower] Dark Red Part 3831 Element 6332063 or 4568761 ×1
  • Hinge Brick 1 x 4 [Upper] Dark Red Part 3830 Element 6342714 or 6011462 ×1
  • Hinge Brick 1 x 4 [Lower] Light Bluish Gray Part 3831 Element 4211461 ×1
  • Hinge Brick 1 x 4 [Upper] Light Bluish Gray Part 3830 Element 6327412 or 6011459 ×1

Minifig Shields, Weapons, & Tools 4 pieces

  • Tool Pickaxe Blocky, Double Medium Azure Part 18789 Element 6093629 ×1
  • Weapon Sword Blocky Medium Azure Part 18787 Element 6093623 ×1
  • Weapon Sword Blocky Pearl Gold Part 18787 Element 6093621 ×2

Containers 2 pieces

  • Treasure Chest Bottom with Rear Slots, with Groove Medium Nougat Part 4738b ×1
  • Treasure Chest Lid [Thick Hinge] Medium Nougat Part 4739a Element 6254218 or 6167286 ×1

Minifig Accessories 2 pieces

  • Equipment Telescope / Torch / Spyglass, Support Round 1 x 1 x 1 2/3 Dark Brown Part 64644 Element 4538950 ×2

Projectiles / Launchers 2 pieces

  • Launcher Trigger, Weapon Gun Trigger Dark Bluish Gray Part 15392 Element 6051334 ×1
  • Launcher, Plate Special 1 x 2 with Mini Blaster White Part 15403 Element 6102732 ×1

Technic Bricks 2 pieces

  • Technic Brick 1 x 1 with Pin Hole Light Bluish Gray Part 6541 Element 4211535 ×1
  • Technic Brick 1 x 2 [2 Pin Holes] Light Bluish Gray Part 32000 Element 4211541 ×1

Technic Pins 2 pieces

  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×2

Technic Special 2 pieces

  • Technic Ball Joint Red Part 32474 Element 4290714 or 4178640 ×2

Panels 1 piece

  • Panel 1 x 6 x 5 Trans-Purple Part 59349 Element 6245260 or 6096709 ×1

Technic Axles 1 piece

  • Technic Axle 5 with Stop Dark Tan Part 15462 Element 6055631 ×1

Technic Beams 1 piece

  • Technic Beam 2 x 4 L-Shape Thick Dark Bluish Gray Part 32140 Element 6271830 or 4210667 ×1

Technic Connectors 1 piece

  • Technic Axle Connector Double Flexible [Rubber] Black Part 45590 Element 4198367 ×1

Tiles Special 1 piece

  • Tile Special 2 x 2 Inverted White Part 11203 Element 6564913 or 6013866 ×1

Tools 1 piece

  • Brick and Axle Separator v2.0 Orange Part 96874 Element 6240515 or 4654448 ×1

Minifigures 4 figures

  • Zombie Pigman Minifigure, checked as a whole figure ×1
  • Blaze Minifigure, checked as a whole figure ×1
  • Steve in Medium Azure Helmet and Armor, Purple Legs Minifigure, checked as a whole figure ×1
  • Alex with Medium Azure Helmet Minifigure, checked as a whole figure ×1

Tick each piece as you find it, or mark it missing.

When a piece really is missing

Ask LEGO

LEGO takes requests for pieces missing from a new set through its customer service site. The form asks for the set number and each piece's element ID, the number printed beside the piece in the parts list at the back of the instructions. This checker lists both.

Request a replacement from LEGO

Buy the piece

Mark a piece missing and your list links it to an eBay search for that part, which also covers pieces from older or second-hand sets.

Keep a record

Copy or download your missing list (the CSV opens in any spreadsheet), or print the whole checklist and tick pieces off on paper. Your marks stay in this browser, so you can check a big set over several sittings.

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