Bolts for extrusion slots
T-Slot Bolts for 20, 30, 40 and 45 Series Profiles
The T-shaped head bears inside the extrusion cavity and resists rotation for direct connections to brackets, base plates, fixtures and equipment accessories.
Product overview
T-Slot Bolts for 20, 30, 40 and 45 Series Profiles
A T-slot bolt uses a head shaped to engage the cavity of an industrial aluminum extrusion. Tightening the external nut draws the head against the slot shoulders and helps prevent rotation, creating a direct connection for brackets, mounting plates, feet, fixtures and machine accessories. Head width, thickness and shoulder geometry determine installation and load transfer.
Longjin manufactures common T-slot bolts for 20, 30, 40 and 45 series profiles, typically with M5-M10 threads and lengths selected for the attachment stack. Carbon steel parts can be zinc or nickel plated, while 304 stainless steel and project-specific options can be reviewed for corrosive environments.
How to select
How to select
The T head controls slot engagement while the threaded length controls the external joint. Verify these details in order.
- 01
Check the slot cross-section
Share the profile series, opening and cavity dimensions so the head can enter, rotate where required and bear correctly.
- 02
Confirm the installation method
State whether the bolt slides from the profile end or must load through the opening and turn into position.
- 03
Calculate thread and length
Include the attachment thickness, washer, nut height and required thread engagement when selecting the bolt.
- 04
Set material and finish
Use the working load, corrosion conditions and appearance requirement to choose steel, stainless steel and coating.
Applications
Applications
- Brackets and mounting plates
- Machine feet and base connections
- Fixtures and workholding
- Conveyor accessories
- Frame base-plate assembly
- Adjustable modular structures
Manufacturing & quality control
Manufacturing & quality control
Inspection focuses on T-head dimensions, shank length, thread acceptance, finish and fit inside the specified slot. A target extrusion or sample can be used to validate loading direction and tightening before production.
Share the profile series, slot width, thread, material and quantity so we can help confirm the right part.- 1
Confirm slot cavity and loading method
- 2
Review head, thread and length
- 3
Validate first-article fit
- 4
Form and thread the production batch
- 5
Inspect dimensions, thread and finish
FAQ
Frequently asked questions
Can a T-slot bolt be inserted through the slot opening?
It depends on the head design and extrusion cavity. Some load from the profile end; others enter through the opening and rotate into position. Confirm the actual section.
How do I select the bolt length?
Add the attachment thickness, washer, mating nut and required thread engagement, then allow practical assembly clearance.
Are all T-slot bolts for 40 series profiles the same?
No. Different slot openings and internal cavities use different head dimensions. A cross-section or extrusion sample should be checked.
Longjin
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Send an inquiry
Share the profile series, slot width, thread, material and quantity so we can help confirm the right part.