Made to drawing or sample
Custom Fasteners for Aluminum Profile Systems
Purpose-built nuts, bolts and connection components for special slots, limited installation space and non-standard assembly requirements.
Product overview
Custom Fasteners for Aluminum Profile Systems
When a standard fastener cannot match a special slot, restricted space or unusual assembly sequence, a custom component can define the outside geometry, thread position, material and finish around the actual joint. Longjin reviews 2D drawings, 3D files, physical samples and target extrusion cross-sections for manufacturability.
A project begins by identifying the working interface and critical dimensions. Material, forming, threading, machining and finishing options are then reviewed before sampling. After approval, production and inspection follow the agreed drawing or sample. Clear revision control is especially important when a component changes during equipment development.
How to select
How to select
Complete input produces a faster and more reliable review. A first inquiry should cover these four areas.
- 01
Drawing and revision
Mark critical dimensions, tolerances, threads and the current revision. Include a 3D file when available.
- 02
Application and mating part
Explain how the part loads, which profile or attachment it mates with and the problem the design must solve.
- 03
Material and finish
State the grade and corrosion or appearance requirement, or describe the service environment if they are undecided.
- 04
Sample and volume
Separate prototype quantity from expected production volume and include any packing requirements.
Applications
Applications
- Special profile slot systems
- Replacement parts for imported equipment
- Connections in restricted spaces
- Dedicated automation accessories
- New-product prototypes and series supply
- Custom packing for export projects
Manufacturing & quality control
Manufacturing & quality control
Quality control follows the approved drawing and sample. Critical dimensions and inspection methods are identified before production, the first article is checked, and process stability is monitored through the batch. Final checks cover quantity, appearance, threads and packing identification.
Send the drawing or sample, quantity, material, finish, extrusion cross-section or slot width, thread and inspection requirements.- 1
Receive drawing or sample
- 2
Review material and manufacturing route
- 3
Confirm quotation and technical details
- 4
Validate sample or first article
- 5
Run production and in-process inspection
- 6
Complete final inspection, packing and delivery
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 you review a sample if I do not have a complete drawing?
Yes, but the critical fit, material, finish and application still need to be confirmed. Complex parts should have an agreed dimensional record before sampling.
What volume information is needed for a custom part?
Provide both prototype quantity and estimated production volume. Volume influences raw material, tooling and the practical manufacturing route.
How should drawing revisions be handled?
Use a clear revision number and identify each change. Production should follow the final version confirmed by both parties so older files are not used by mistake.
Longjin
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Send an inquiry
Send the drawing or sample, quantity, material, finish, critical dimensions and inspection requirements for a process and production review.