Direct Factory Metal Zipper Bottom Stop Accessories
Overview
Metal zipper bottom stops are small retaining components installed at the lower end of a zipper chain to prevent the slider from disengaging. They are typically formed from stainless steel, brass, or zinc alloy and are stamped or machined to precise tolerances.
Technical Specifications
| Parameter | Typical Value | Notes |
|---|---|---|
| Material | Stainless Steel 304, Brass C36000, Zinc Alloy Zamak 3 | Selected based on corrosion resistance and cost |
| Thickness | 0.30 mm – 0.60 mm | Depends on zipper gauge |
| Width (across chain) | 2.5 mm – 4.0 mm | Matches standard #3, #5, #8 zipper tapes |
| Tolerance | ±0.02 mm | Ensures consistent engagement |
Material Options
- Stainless Steel 304 – excellent resistance to oxidation, suitable for outdoor gear and marine applications.
- Brass C36000 – good machinability, attractive appearance, used in fashion accessories.
- Zinc Alloy Zamak 3 – cost‑effective, adequate strength for everyday garments.
Dimensional Characteristics
The bottom stop must align with the zipper chain width and provide sufficient retaining force without damaging the tape. Typical dimensions are listed below for common zipper sizes.
| Zipper Size | Stop Width (mm) | Stop Height (mm) |
|---|---|---|
| #3 (light) | 2.5 | 1.2 |
| #5 (medium) | 3.0 | 1.5 |
| #8 (heavy) | 4.0 | 2.0 |
Typical Applications
In heavy‑duty workwear, the bottom stop prevents slider pull‑off under repeated tensile loads, extending service life. In luggage and outdoor equipment, corrosion‑resistant stainless steel stops withstand exposure to moisture and UV without degradation. For fashion garments, brass stops provide a smooth finish that complements decorative tapes while maintaining reliable retention.
Quality Control & Inspection
Each batch undergoes dimensional verification using optical comparators, with acceptance criteria of ±0.02 mm on width and height. Material composition is checked via X‑ray fluorescence for alloy batches, and surface finish is evaluated for burrs under 10× magnification. Functional testing involves sliding a zipper slider 500 cycles to confirm that the stop retains the slider without deformation.
Customization Possibilities
- Alternative materials such as phosphor bronze for high‑fatigue environments.
- Custom widths and heights to match non‑standard zipper tapes.
- Special coatings: nickel‑plated for enhanced corrosion resistance or black oxide for reduced glare.
- Packaging in anti‑static bags or bulk trays per customer specifications.
Packaging & Shipping
Stops are packed in sealed polyethylene bags containing 1,000 pieces, then placed in corrugated cartons with internal dividers to prevent movement. Cartons are labeled with part number, material, and quantity. For export, cartons are palletized and stretch‑wrapped, with humidity indicator cards included to monitor moisture exposure.
Frequently Asked Questions
- Can dimensions be customized?
- Yes. Width, height, and thickness can be adjusted to match specific zipper tapes; provide a drawing or sample for quotation.
- What information is required before quotation?
- Material preference, zipper size, required tolerance, order quantity, and any special coating or packaging needs.
- How is quality inspected?
- Dimensional checks via optical comparators, material verification by XRF, and functional cycling tests as described in the quality control section.
- What packaging methods are available?
- Standard polyethylene bags, anti‑static bags, bulk trays, or custom‑printed cartons upon request.
- What is the typical production lead time?
- Lead time ranges from 2 to 4 weeks depending on material availability and order size; exact schedule confirmed at order.
Request a Quote
To obtain a formal quotation, please share your specifications via the contact form. Our engineering team will review the details and return a detailed quote with lead time and payment terms.
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