👉   Play freely and build endless fun at home with STEMFIE, the free 3D-printable educational toy   👈 

The files in the STEMFIE construction set are named according to the structure described below:

 BeamSTR ESS BU05x01x01 - SPN-BEM-0042 (stemfie.org).stl 

 Part type  Structure Variations  Dimension Unique STEMFIE Part Number  (Project Home URL).filetype

  •  Part Type
    • Describes the type of part, such as beams, braces, fasteners, springs, washers, etc.
  •  Structure Variations
    • These abbreviations define variations of the type of part, such as if the ends are square or rounded, if there is a joint, etc.
  •  Dimension
    • The dimension defines the size of the part, described in the number (or fractions) of STEMFIE block units (BU = 12.5 mm). The usual order is Length x Width x Height x Variations. The values contain trailing zeros for clear sequential listing in file folders. Some part dimensions may describe the size in millimeters (mm).
  •  Unique STEMFIE Number
    • This is the unique identifier for STEMFIE items: SPN (STEMFIE Part Number), SPS (STEMFIE Project Set), SCT (STEMFIE Construction Template). 
  •  Project Home URL
  •  Filetype


Within the names of STEMFIE parts, there are abbreviations such as those described below:

Definition Abbreviation
Adaptor ADT
Alternating ALT
Angle AGL
Angled AGD
Asymmetric ASYM
Barbed BRD
Barrel BRL
Beam BEM
Bearing BRN
Bearing Shaft BRNS
Bevelled BVD
Bidirectional BDR
BlockUnit BU
BlockUnit Hole BUH
Both Ends BE
Box-section BXS
Brace BRC
Bracket BRK
Bridged BRG
Brushed BSD
Brushless BLS
Cam-Locking CL
Cap Nut CPN
Centered CNT
Connector CON
Corner CRN
Countersunk Head CSH
Cross CRS
Diameter DIA
Double-End DE
Driver DVR
End Round Round ERR
End Round Square ERS
End Square Square ESS
End Right-hand Thread Right-hand Thread ERHRH
End Right-hand Thread Square ERHS
Female F
Fixed FXD
Flanged FLG
Flat FLT
Four-Way 4W
Free FRE
Freewheel FW
Full-Length FL
Fully Threaded FT
Gear GER
Ground GND
Headed HDD
Hexagonal HEX
Hinge HNG
Holder HLD
Inner INR
Insert ISR
Joint Mortice & Tenon JM&T
Joint Mortice Centered JMC
Joint Mortice Double-ended JMDE
Joint Mortice Single-ended JMSE
Joint Tenon Single-ended JTSE
Knurled KNR
Lap Joint LJT
Laying LAY
Locating LCT
Longitudinal Tread LTRD
Longitudinal LNG
Loop LOP
Male M
Non-Printed Hardware NPH
One-Way 1W
Open OPN
Outer OUT
Pinhead PH
Plain PLN
Plate PLT
Pulley PLY
Recessed RSD
Recessed Head RSDH
Revolution REV
Right RHT
Right-Hand Thread RH
Rotor RTR
Rounded Head RHD
Screw SCR
Sequential SQT
Shaft SFT
Shallow Head SH
Shank SNK
Shim SHM
Shoulder Screw SSC
Sign SGN
Single-Ended SE
Slanted SLTD
Slottet SLT
Socket SOC
Spacer SPR
Sphere SPH
Spring SPG
Spring Pin SPP
Stand STN
Standard STD
Standing STA
STEMFIE Construction Template SCT
Straight STR
Surface SFC
Symmetric SYM
Square SQR
Template TPL
Thickness T
Thin THN
Thread Eye THREYE
Threaded Rod THR
Three-Way 3W
Through-Hole TRH-H
Traversal Tread TTRD
Transverse TRV
Triangular TRI
Trigger TGR
T-shaped TSH
Two-Way 2W
U-shaped USH
Unidirectional UDR
Washer WSR
Wedge WDG
Wheel WHL
Width WDT


Quick-print sample

STEMFIE.org Quick print sample shoulder screw pin nut washers brace

The STEMFIE Quick-print Sample file is an easy way to test a few STEMFIE parts and fasteners. You can also check the STEMFIE Calibration File for more elaborate types of fasteners.



STEMFIE is a free, open-source, 3D-printable construction set toy that helps children learn STEM! Download the files freely, and please support my efforts to expand this project.