In-slot threaded fasteners
T-Slot Nuts for 20, 30, 40 and 45 Series Profiles
A reliable threaded anchor inside the extrusion slot for brackets, panels, rails and machine-frame accessories.
Product overview
T-Slot Nuts for 20, 30, 40 and 45 Series Profiles
A T-slot nut creates a threaded anchor inside an industrial aluminum extrusion. Used with a socket screw, bracket or mounting plate, it connects frame members and secures accessories without welding. Because slot openings and internal cavities vary between extrusion systems, the outside geometry must be checked against the actual profile rather than the nominal series name alone.
Longjin produces common T-slot nuts for 20, 30, 40 and 45 series profiles and reviews special widths, heights, thread positions and materials from customer drawings. Most end-loading T nuts need to be planned before the frame ends are closed, so the assembly sequence and future attachment points should be considered during selection.
How to select
How to select
The fit between the nut and the slot cavity is more important than the product name. Check these points in order.
- 01
Verify the slot system
Share the extrusion cross-section, supplier reference or slot dimensions to distinguish profiles within the same series.
- 02
Choose the mating thread
Match the bolt and attachment hole, then consider the load and available thread engagement.
- 03
Plan preloaded quantities
End-loading T nuts should be placed before the frame is closed, including extras for later attachments where needed.
- 04
Set material requirements
Corrosion, cleanliness, appearance and cost guide the choice between steel, stainless steel and finish.
Compatibility
20, 30, 40 and 45 series compatibility check
A profile series name narrows the search but does not prove fit. The following information is enough for Longjin to begin a compatibility review.
| Profile range | Buyer supplies | Longjin checks | Confirmation |
|---|---|---|---|
| 20 / 30 series | Cross-section, slot opening, supplier reference or sample | Opening, internal cavity, nut body and thread location | Approved drawing or sample |
| 40 / 45 series | Cross-section plus slot 8, slot 10 or actual dimensions | Loading direction, shoulder fit, thread and engagement | Approved drawing or sample |
| Other profile systems | Full section, target thread, material and order volume | Manufacturability, critical tolerances and inspection method | Sample approval before production |
Two profiles sold as “40 series” may not use interchangeable nuts. Send the actual cross-section, or arrange a profile and nut sample when drawings are unavailable.
Applications
Applications
- Frame bracket connections
- Panels and door hinges
- Sensors and linear rails
- Workbench accessories
- Conveyor supports
- Modular frame extensions
Manufacturing & quality control
Manufacturing & quality control
Inspection focuses on slot fit, outside dimensions, thread acceptance and surface condition. Critical dimensions can be checked against a confirmed drawing or approved sample before production, with inspection and packing requirements agreed for the batch.
Send the drawing or sample, quantity, material, finish, extrusion cross-section or slot width, thread and inspection requirements.- 1
Check the extrusion cross-section
- 2
Confirm thread and material
- 3
Inspect the first article
- 4
Thread and finish the batch
- 5
Complete thread and visual inspection
Longjin evidence
Product and supply evidence
Images on this page come from Longjin product materials and production lots. Upstream material certificates or quality inspection documents can be supplied for applicable orders and batches.
PDF product catalog
Download the aluminum profile fasteners catalog
Review the product range, common threads and materials, selection inputs, MOQ, production capacity and RFQ checklist.
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
What is the difference between a T-slot nut and a slide-in nut?
Both provide a threaded connection inside the slot, but geometry, loading direction and positioning behavior vary. Selection should follow the profile cavity and assembly sequence.
Are all 40 series T-slot nuts interchangeable?
No. A 40 series profile may use slot 8, slot 10 or another cavity design. The actual slot opening and internal dimensions need to be confirmed.
Can you manufacture from an existing sample?
A sample can be reviewed, but a drawing, target material, finish and expected volume provide a more reliable basis for production and inspection.
Longjin
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Send an inquiry
Send the drawing or sample, quantity, material, finish, extrusion cross-section or slot width, thread and inspection requirements.