Name: BT2.5 Button Head Cap Self Tapping Screw (BHCS)
Brand: Bambu Lab
SKU: B-AA217
Price: 0.95 USD
Availability: InStock

Documentation

Specification 3D Model

Product ID	L (mm) Bolt Length	D (mm) Head Diameter	H (mm) Head Thickness	k (mm) Hexagon Across Flats	t (mm) Groove Depth	Screwdriver Bit Size
AA217	5	4.7	1.5	1.5	0.8	H1.5
AA135	6	4.7	1.5	1.5	0.8	H1.5
AA136	8	4.7	1.5	1.5	0.8	H1.5
AA218	10	4.7	1.5	1.5	0.8	H1.5
AA137	12	4.7	1.5	1.5	0.8	H1.5
AA219	14	4.7	1.5	1.5	0.8	H1.5
AA138	16	4.7	1.5	1.5	0.8	H1.5
AA220	18	4.7	1.5	1.5	0.8	H1.5
AA139	20	4.7	1.5	1.5	0.8	H1.5
AA140	25	4.7	1.5	1.5	0.8	H1.5
AA141	30	4.7	1.5	1.5	0.8	H1.5

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Self-Tapping Screws for 3D Printing

For 3D printed parts, which often have gaps between layers and varying hole sizes, we recommend using BT self-tapping screws. These screws provide moderate torque for insertion, prevent loosening, and can be installed and removed multiple times. Using these screws and matching them with the recommended hole size ensures easy and secure connections for your printed parts, eliminating the need for nuts and avoiding issues like screw loosening or hole shrinkage.

We have included the relevant data for the twisting torque and loosening torque experiments of PLA and PETG material specimens, as well as the recommended hole sizes for design. The model files for testing are available for download at the end of the details page. All test holes are printed perpendicularly to the platform. When designing a bolt bottom hole on the side of the part, it is recommended to use a size one size larger than the recommended size for lying flat to prevent interlayer compression cracking.

Test Data for Self-Tapping Screws 3D Document for Screws Test

Basic Information

Surface Treatment	Black zinc-nickel alloy plating
Mounting Hole Shape	Hex socket
Screw Type	Complete thread

Material	Carbon steel
Thread Ridge Type	Metric coarse
Color	Black

Product Feature

Self-Tapping Screws for 3D Printing
Carbon Steel Button Head Cap Self Tapping Screw (BHCS)
Nominal thread: BT2~BT3
Strength grade: 4.8
Type of thread: Metric coarse thread
Full thread series

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