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.
Send the drawing or sample, quantity, material, finish, extrusion cross-section or slot width, thread and inspection requirements.- 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
Purchasing & production
Purchasing & production
These are normal production conditions. Final terms follow the approved drawing, sample, quotation and purchase order.
For a quotation, send the drawing or sample, quantity, material, finish, extrusion cross-section or slot width, thread and inspection requirements.
- Standard-part MOQ
- Normally 1,000 pieces per specification.
- Custom-part MOQ
- Normally 10,000 pieces, subject to material, geometry and process review.
- Dimensions & tolerances
- Manufactured to the mutually approved drawing. Please identify critical dimensions, tolerances and mating requirements.
- Samples & tooling
- Sampling is supported. Small sample quantities are normally free of sample charge with freight collect; dedicated tooling or die costs are quoted when required.
- Production planning
- Mass production begins after sample approval. Capacity is up to about 5 million standard parts per month and 500,000 custom parts per month; delivery timing is confirmed by order quantity and process.
- Inspection
- Professional inspection equipment is used for dimensional, thread, appearance and fit requirements. 100% inspection can be arranged as agreed for the order.
- Materials & finishes
- Materials can be reviewed to specification; common finishes include nickel plating and zinc plating.
- Material documents
- Upstream material certificates or quality inspection documents can be provided for the applicable order and material batch.
- Packaging
- Customer labels, specification-separated packing and other confirmed packaging requirements are supported.
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
Explore related products
Aluminum framing connections
Aluminum Profile Accessories for Industrial Framing
View details →
In-slot threaded fasteners
T-Slot Nuts for 20, 30, 40 and 45 Series Profiles
View details →
Manufacturer · Standard and custom
Slide-In Nut Manufacturer for Aluminum Extrusions
View details →
Position-retaining slot nuts
Spring Nuts for 20, 30, 40 and 45 Series Profiles
View details →
Made to drawing or sample
Custom Fasteners for Aluminum Profile Systems
View details →Longjin Fastener
Send an inquiry
Send the drawing or sample, quantity, material, finish, extrusion cross-section or slot width, thread and inspection requirements.