
U19
U19-Metal Melon-Seed Arch Turn Button Clip (Black)

Industrial machinery
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Factory-direct pricing · EXW Yiwu
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Metal Melon-Seed Arch Turn Button Clip Black – U19 Complete Guide
The Metal Melon-Seed Arch Turn Button Clip Black (SKU: U19) is XKY Framing’s most innovative design — a clip that merges the compact melon-seed profile with the spring-loading action of an arch clip. The result is a 16 mm fastener that locks automatically with spring tension in a frame rabbet too small for standard arch clips.
Small and medium frames often have narrow rabbets that cannot accommodate the 24.8 mm arch clips (U12/U13). The U19 Metal Melon-Seed Arch Turn Button Clip Black fits into rabbets as narrow as 5 mm while still providing the spring-loaded locking advantage of an arch design.
Total length: 16 mm. Head width: 5.5 mm. Base width: 6.5 mm. Narrow neck: 2.5 mm. Hole diameter: 2.8 mm. Thickness: 0.5 mm. Arch height: 2 mm.
Seat backing board. Position U19 clip over rabbet. Fasten with 2.8 mm hole compatible screw. Rotate to lock — the 2 mm arch springs against the backing board automatically.
For standard arch clips see U12 Large Silver Arch Turn Button Clip . For plain melon-seed see U01 Small Metal Turn Button Clip Black .
0.5 mm spring-grade steel, matte black coating.
Application Scenarios
U19-Metal Melon-Seed Arch Turn Button Clip (Black) serves gallery, retail, and e-commerce frame assembly where reliable hanging hardware, connectors, and finishing accessories determine customer satisfaction. Installers and production teams specify quantities per frame size and mounting environment (wall, easel, security fixings).
Wholesale buyers and contract framers source these parts for bulk trade packs — consistent plating, thread standards, and carton counts reduce picking errors on fast-moving SKUs. The product suits both workshop stock and export cartons bundled with finished frames.
When specifying picture framing hardware for a new product line, use this page to confirm dimensions, finish options, and factory-direct MOQ before placing a trial order with XKY Framing.
Key Specifications
Key specification data for U19-Metal Melon-Seed Arch Turn Button Clip (Black) is listed for procurement and compatibility checks. Confirm carton quantities and labeling requirements when ordering for export or private-label programs.
- MOQ: 100
- Lead time: 7-10days
- Material: Metal (Steel)
- Color: Black
- Total Length: 16 mm
- Width (Head): 5.5 mm
- Width (Tail): 2.5 mm / 6.5 mm base
- Hole Diameter: 2.8 mm
Engineering teams should cross-check these parameters against your existing line layout — air pressure, power supply, and throughput figures determine whether this SKU slots into an existing station or requires a standalone footprint. Request a dimensional drawing or datasheet via the quote form if your facility plan is already frozen.
OEM Customization & Support
XKY Framing manufactures hardware with OEM and private-label options: custom voltage, pneumatic hookups, tooling sets, multilingual manuals, and export crating. Importers serving North America, Europe, and Asia-Pacific can align documentation with local electrical and safety expectations during the quote stage.
Standard lead times apply to catalog configurations; larger framing lines or repeat annual programs may qualify for revised MOQ and scheduled production slots. Submit your target price band, annual volume, and destination port — U19-Metal Melon-Seed Arch Turn Button Clip (Black) quotes include EXW Yiwu pricing with optional freight coordination through our logistics partners.
Quality & Factory Direct Supply
XKY Framing operates as a CE-oriented framing equipment manufacturer based in Yiwu, China, supplying workshops and OEM partners in North America, Europe, and Asia-Pacific. Each catalog SKU is supported by factory-direct communication — engineering clarifications, spare parts, and documentation without distributor layers.
Quality control for U19-Metal Melon-Seed Arch Turn Button Clip (Black) follows incoming material checks, in-process inspection, and pre-shipment review with photos available on request. We align with buyers who need repeatable specifications across repeat orders, private-label cartons, or integration into a broader picture framing production line sourced from a single vendor.
Ordering & Delivery
Request a formal quotation by email or through the on-page quote form — include quantity, destination country, and any voltage or labeling requirements. XKY Framing responds with EXW unit pricing, estimated lead time, and optional FOB Ningbo/Shanghai terms for consolidated sea freight.
Hardware SKUs ship in trade inner packs and export cartons with weight and dimension labels for freight forwarder booking. First-time importers receive packing list samples and commercial invoice templates suitable for customs clearance. Repeat buyers can align annual call-off schedules once baseline quality and logistics are approved.
For U19-Metal Melon-Seed Arch Turn Button Clip (Black), trial orders and sample units are available on selected SKUs before you commit to container volumes. Ask our sales team about compatibility with your existing framing line when ordering mixed equipment and accessory SKUs in the same shipment.
Specifications
| SKU | U19 |
|---|---|
| Product Type | hardware |
| MOQ | 100 |
| Lead Time | 7-10days |
| Overview | <p>The U19 Metal Melon-Seed Arch Turn Button Clip Black is a unique hybrid that combines the compact melon-seed profile with a 2 mm spring arch, delivering spring-loaded backing retention in a 16 mm footprint.</p> |
| Custom Packaging | Yes |
| Material | Metal (Steel) |
| Color | Black |
| Total Length | 16 mm |
| Width (Head) | 5.5 mm |
| Width (Tail) | 2.5 mm / 6.5 mm base |
| Hole Diameter | 2.8 mm |
| Thickness | 0.5 mm |
| Arch Height | 2 mm |
| Size Grade | Standard |
| Shape | Melon-Seed with Arch |
| — | 11 |
|---|
FAQ
What makes U19 a hybrid clip?
U19 combines the melon-seed outer shape with the internal arch spring geometry — locking via both profile and spring tension.
What is the base width of U19?
The base (widest point of the tail body) is 6.5 mm, while the narrow neck of the melon-seed shape is 2.5 mm.
Is 0.5 mm thickness suitable for spring clips?
Yes. The 2 mm arch is engineered to operate within the elastic range of 0.5 mm steel, ensuring thousands of open-close cycles without fatigue.
Can this machine be customized?
Yes. U19 supports OEM customization including voltage (110V/220V/380V), pneumatic requirements, tooling, and export packaging. Share your moulding profile, daily output target, and destination market — our engineering team will confirm a factory-direct specification and lead time.
Do you provide overseas technical support?
Yes. XKY Framing provides remote commissioning guidance, spare parts supply, and video troubleshooting for hardware installations worldwide. For larger framing lines we can arrange on-site support by appointment. Contact us with your order reference for dedicated after-sales assistance.
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