Qingdao Railing-O Metal Product Co.,
| TUBE | 40X40 |
| Surface Finish | Satin / Mirror (optional) |
| A×B (mm) | 40×40 |
| Material | Stainless Steel AISI304 (interior) / 316 (exterior) |
| MOQ / Sample | 100 pcs or as per items, Free sample available |
| Installation | Indoor (AISI304) / Outdoor (AISI316) |
| Certificate | MTC, ISO9001 |
| HEIGHT | 6 MM |
| Product Type | 40×40mm Slot Tube Straight Connector |
| Payment Terms | L/C,D/A,D/P,T/T,Western Union |
| ITEM# | QLS030.040 |
| Certification | CE certifiate/ ISO9001 |
| Place of Origin | Qingdao, China |
| Model Number | QLS030.040 |
| Brand Name | Railing-O |
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Product Specification
| TUBE | 40X40 | Surface Finish | Satin / Mirror (optional) |
| A×B (mm) | 40×40 | Material | Stainless Steel AISI304 (interior) / 316 (exterior) |
| MOQ / Sample | 100 pcs or as per items, Free sample available | Installation | Indoor (AISI304) / Outdoor (AISI316) |
| Certificate | MTC, ISO9001 | HEIGHT | 6 MM |
| Product Type | 40×40mm Slot Tube Straight Connector | Payment Terms | L/C,D/A,D/P,T/T,Western Union |
| ITEM# | QLS030.040 | Certification | CE certifiate/ ISO9001 |
| Place of Origin | Qingdao, China | Model Number | QLS030.040 |
| Brand Name | Railing-O | ||
| High Light | straight joiner mtc ，low profile slotted tube ，slotted tube 40 x 40 | ||
The QLS030.040 slot tube straight connector is a low‑profile inline coupling designed specifically for 40×40mm slotted square tube handrail systems. Manufactured from stainless steel – AISI304 for interior applications and AISI316 for exterior environments – this connector enables seamless tube‑to‑tube joining with a minimal 6mm height, creating near‑invisible splices that maintain clean sightlines. The precision‑engineered geometry engages with the tube’s internal slot, providing secure mechanical connection without external brackets. Available in mirror or satin finishes, this straight connector offers a discreet, reliable solution for extending handrail runs in contemporary architectural projects.
Slot‑tube compatibility – engineered to engage with 40×40mm profiled tubes.
Ultra‑low profile – 6mm height ensures near‑invisible, flush‑fitting joints.
Dual material grades – AISI304 for interiors; AISI316 for coastal and high‑humidity environments.
Two finish options – mirror polished or satin brushed for design versatility.
Mechanical engagement – utilises existing tube slot for secure connection; adhesive optional.
ISO9001 certified – quality assurance with MTC documentation provided.
Ideal for extending slotted tube handrails in residential, commercial, and public settings – including balconies, terraces, staircases, hotels, shopping centres, and office buildings. The ultra‑low profile makes it particularly suitable for minimalist architectural designs where concealed joints are essential.
| Parameter | Value |
|---|---|
| Product Type | Slot Tube Straight Connector |
| Model | QLS030.040 |
| Material | AISI304 / AISI316 (optional) |
| Finish | Mirror / Satin |
| Compatible Tube | 40×40mm slotted square tube |
| Wall Thickness | 1.5 mm |
| Height (H) | 6 mm |
| Installation | Slot‑engagement + optional adhesive |
| Certification | MTC, ISO9001 |
| MOQ | 50 pcs; free sample available |
Each connector is individually wrapped in protective plastic bags, packed in cartons, and loaded onto pallets for secure transit. Custom packaging available on request. Delivery timelines are arranged according to order quantities and production schedules; we guarantee on‑time shipment as committed. MTC and ISO9001 certification documents accompany every consignment.
Slot‑specific engineering – precise fit for 40×40mm slotted systems.
Invisible splicing – 6mm height for discreet, flush connections.
Flexible material choice – 304 for interiors, 316 for exteriors.
Lower MOQ – 50 pcs minimum with free sample available.
Quality certified – ISO9001 and MTC documentation included.
Factory‑direct value – competitive pricing with volume discounts.
Company Details
Business Type:
Manufacturer
Year Established:
2016
Total Annual:
50000000-50000000
Employee Number:
200~200
Ecer Certification：
Verified Supplier
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