Apache 3800 Tool Strap Board System

COMPLETE SYSTEM BUNDLE
This Strap Tool System is also available in a discounted bundle with the matching Apache 3800 Bin, Lid, and Divider Organizer System. See the bundle option displayed on this page.

This system will completely transform you Apache 3800 case to a professional and organized system for small parts, to large tools. Perfect for customizing any trade on the go from electricians, computer technicians, manicurists, and more.

The tool strap board is customizable to any layout by placing the tools and configuring the layout pattern for the straps. The strap board will utilize the upper lid compartment that would not be otherwise used. Making use of all available space in the case.

WHAT IS INCLUDED

• Four-piece Strap Board files
• Frame-assembly files
• Screw-clamp files (Wedge Clamp if desired)
• Professional illustrated PDF installation guide

SUPPLIES REQUIRED

8 * M4x16 flat head screws + nuts
8 * M4x20 flat head screws + nuts
20 * M2x12 flat head screws + nuts
10' of 25mm x 1.8mm black elastic strap
20" of 3M or similar 1/2" wide double sided foam sticky tape
Epoxy/CA Glue

TOOLS REQURED

Power Drill
#19 or 7/32" wood drill bit
Small Rubber Mallet
Hex/Philips Screwdriver with bits (Depending on what screws used)

This is a digital-file download. The protective case, printed parts, elastic, tools, hardware, epoxy, and other physical supplies are not included.

Read the complete installation guide before drilling or assembling the system. Confirm all printed components and hardware placement before making permanent changes to the case.

For personal use only. The digital files and printed products may not be redistributed or sold under the selected license.

Shout out to JohnS - NOCTL for the assist on the lid frame.
https://www.printables.com/@jrsphoto

Apache and Harbor Freight are trademarks of their respective owners. Keys & Mice is not affiliated with or endorsed by Harbor Freight Tools. Brand names are used only to identify product compatibility.

See our Apache 3800 Complete Bin System to further enhance your organization. A bundle is available for the complete system.

COMPLETE SYSTEM BUNDLE
This Strap Tool System is also available in a discounted bundle with the matching Apache 3800 Bin, Lid, and Divider Organizer System. See the bundle option displayed on this page.

© 2026 Keys & Mice. All rights reserved.
Purchase grants only the rights stated in the Cults license associated with this product. The digital STL, 3MF, CAD and associated files may not be redistributed, uploaded, shared, exchanged, sublicensed or resold, whether modified or unmodified. Legal action will be pursued if necessary.

PRINTING PROCESS
FDM / FFF

RECOMMENDED MATERIAL
PETG

PETG is recommended because the Strap Board is a functional tool-retention system and may be stored in vehicles, garages, or other warm environments. PLA is not recommended for prolonged exposure to high temperatures.

NOZZLE
0.4 mm

SCALE
Print every part at 100% scale.
The models are designed in millimeters.
Do not resize the models.

STRAP BOARD PANELS AND FRAME PIECES

Layer height: 0.20 mm
First-layer height: 0.20 mm
Wall loops/perimeters: 5
Top layers: 5
Bottom layers: 5
Infill: 25%
Infill pattern: Gyroid
Supports: Not normally required
Brim: Optional 5 mm brim for PETG if corners lift
Raft: No

Print the Strap Board and frame pieces on their broadest flat surfaces. Keep nut pockets, recessed channels, countersinks, and other detailed openings facing upward whenever possible.

SCREW CLAMPS

Layer height: 0.16 mm
Wall loops/perimeters: 6
Infill: 100%
Supports: Not normally required
Brim: Optional for additional bed adhesion

Print each clamp half flat with the interlocking teeth and screw-hole details facing upward. Keeping the teeth away from the build plate helps preserve their shape and gripping ability.

TEMPERATURE AND COOLING

Use the temperature, bed-temperature, flow-rate, and cooling settings recommended by the manufacturer of your PETG filament.

A properly calibrated PETG filament profile is recommended. Dry the filament before printing if there is stringing, bubbling, roughness, or weak layer bonding.

PRINT SPEED

Use the printer’s normal or standard PETG speed profile.
Do not use high-speed, Sport, or Ludic modes for the screw clamps, dovetail joints, nut pockets, or screw holes.

ORIENTATION

Use the supplied model orientation whenever available.

Keep the following features facing upward:
• Screw-clamp teeth
• Nut pockets
• Recessed frame channels
• Countersunk screw openings
• Detailed dovetail and hardware features

BED ADHESION

Clean the build surface before printing.
A brim may be used on long frame pieces or large Strap Board sections if any edge begins lifting.

DIMENSIONAL ACCURACY

A dimensionally calibrated printer is required.

Do not apply automatic XY scaling or shrinkage compensation to the complete system. Changes to model scale may affect:
• Frame joints
• Strap Board seating
• Screw-hole alignment
• M2 and M4 hardware fit
• Nut-pocket fit
• Screw-clamp operation

TEST PRINTS

Before printing the complete system, print:
• One complete screw clamp
• One mating frame-joint area, when available
• One hardware section containing an M4 nut pocket and screw hole

Confirm that the clamp closes correctly, the frame joint seats properly, and the hardware fits before printing every component.

ASSEMBLY

Read the supplied 3800 Strap Board Installation Guide completely before drilling the case, applying epoxy, or installing hardware.