Brand:DG Buddy
Compact brass screw-back O-ring stud rivet with smooth rotating pull ring. Ideal for handbags, phone cases and leather accessories. Lightweight 3.45 g, 9 mm base. Nearly 20 years of manufacturing experience, free stock samples available, OEM customization supported.
A brass screw back O-ring stud rivet is a two-piece metal fastener consisting of a circular base with an integrated ball post and a rotating O-ring or pull ring, secured by a matching flat-head screw. It serves as a compact, removable connector for attaching chains, charms, tassels, straps or keyrings to handbags, leather goods and accessories. The brass construction delivers a premium appearance and reliable corrosion resistance, while the screw-back design allows easy installation and removal with a standard Phillips screwdriver. This hardware is widely chosen by bag designers and leathercraft makers who need a clean, low-profile attachment point that rotates freely without binding.
One thing buyers often ask is how this rivet differs from a standard double-cap rivet or a permanent Chicago screw. The defining feature is the ball-post head that holds a free-rotating O-ring. The ring can accept a bag chain, a decorative tassel, a keyring or a phone-case strap without twisting the base. Because the ring sits above the base, the hardware remains low-profile yet fully functional.
In our factory the base is precision-machined from solid brass so the thread pitch matches the screw exactly. This prevents the common problem of a loose fit after a few months of daily use. The O-ring itself is formed from the same brass stock or from a compatible alloy, then polished and plated together with the base to ensure color consistency.
An O-ring is fully circular and allows unrestricted rotation in every direction. A D-ring has a flat side that limits movement and is usually preferred when a strap needs a fixed orientation. For bag charms, phone cases and light chain connectors the O-ring version is more popular because it never binds.
Brass offers better long-term corrosion resistance and a warmer metallic tone that many luxury brands prefer. Zinc alloy is lighter and cheaper but can develop white oxidation or plating wear faster under sweat and humidity. When customers compare suppliers they often test both materials side by side after salt-spray exposure.
| Feature | Brass Screw Back O-Ring Stud Rivet | Zinc Alloy Equivalent |
|---|---|---|
| Density / Weight | 3.45 g (solid feel) | Typically 2.2–2.8 g |
| Corrosion Resistance | Excellent after electroplating | Good, but more prone to white rust |
| Plating Adhesion | Superior on curved ball-post surfaces | Requires extra undercoat |
| Thread Strength | High – resists stripping | Adequate for light duty |
| Color Warmth | Natural golden undertone | Cooler, more neutral |
| Cost Level | Mid to premium | Lower |
| Typical Use | Luxury handbags, leather goods | Fast-fashion or promotional items |
| OEM Tooling Life | Longer die life with proper maintenance | Shorter under high-volume runs |
The technical drawing of this rivet highlights several critical measurements that affect both aesthetics and function. The 9 mm base diameter is the most searched size for medium-weight fashion bags; it sits flush without looking oversized. The 7 mm screw head provides enough surface area to distribute pressure and prevent the leather from tearing. The 5 mm overall height keeps the hardware from catching on clothing or other bag surfaces.
Ring inner diameter is sized to accept standard 3–4 mm chain links or charm jump rings. Wire diameter of the O-ring itself is kept consistent so the ring does not deform under normal pull force. Weight is controlled at 3.45 g so a set of four or six pieces does not add noticeable bulk to a lightweight cross-body bag.
Raw brass rod or billet is first cut to length, then die-cast or CNC-machined into the ball-post base and the matching screw. After trimming, every piece goes through multiple grinding and polishing stages. The ball surface and the recessed areas around the ring attachment receive extra attention because these zones are the first to show plating defects.
Electroplating follows a multi-bath sequence: copper undercoat for adhesion, nickel intermediate layer for hardness, and the final color layer (gold, antique brass, gunmetal, etc.). Salt-spray testing is performed on every production batch to verify plating integrity. Final 100 % visual and thread inspection catches any incomplete threads or surface marks before packing in pearl foam and OPP bags inside export cartons.
This brass screw back O-ring stud rivet suits luxury and contemporary fashion brands that need a refined attachment point for charms or removable chains. It is also ideal for leathercraft workshops and small OEM factories producing phone cases or key fobs. Fast-fashion brands focused only on lowest cost may prefer a zinc version. Designers who frequently change hardware configurations appreciate the removable screw-back design because it supports product iterations without discarding the bag body.
Custom mold development is available for non-standard base diameters or special ring shapes. Laser or embossed logos can be added on the flat underside of the screw or on the base. Oil-filling, private labeling, custom hang tags, barcodes and retail packaging boxes are all supported. Electroplating can be matched to existing hardware sets using physical samples or Pantone references. Nearly 20 years of manufacturing experience means tooling and process adjustments are handled efficiently, with sample lead times of 5–7 days for most modifications.
During prototype development for a European handbag line, the client needed a discreet connector that would accept both a short tassel and a longer chain without looking bulky. The 9 mm brass screw back O-ring stud rivet solved the problem: the ring rotated freely, the gold finish matched their existing hardware, and the low weight kept the overall bag under the target. Another common use is on phone cases where the same rivet secures a short strap or charm loop. In both cases the screw-back design allowed the brand to replace a damaged piece in the field without specialized tools.
Brass with quality electroplating resists normal humidity and light sweat. Avoid prolonged contact with strong acids or chlorinated water. After exposure to salt air or heavy rain, wipe the hardware dry. Store finished bags in a dry environment; excess moisture trapped against the metal can eventually affect the plating. Cleaning with a soft dry cloth is usually sufficient; avoid abrasive polishes that can remove the top plating layer.
What is the MOQ for the brass screw back O-ring stud rivet?
2000 pcs (negotiable based on order details). Mixed finishes within the same order are often possible once the total reaches the MOQ.
How long does sampling take?
Stock samples ship in 1–3 days. Custom samples requiring new finish or minor tooling changes take 5–7 days. Custom sample fees are fully deductible from bulk orders.
Can you match an existing hardware finish?
Yes. Send a physical sample or a clear photo with lighting notes. We adjust the plating bath parameters and confirm with a small batch before full production.
Is the ring fixed or does it rotate?
The O-ring rotates freely 360°. This is intentional so chains and charms do not twist the base or stress the leather.
What packaging do you use?
Standard is pearl foam + OPP bag + export carton. Customized packaging, hang tags and retail boxes are available on request.
Do you provide quality certification documents?
We maintain quality certification documentation and are happy to provide the current valid certificates upon request during your sourcing evaluation.
Can the size be customized?
Yes. Non-standard base diameters or ring sizes require a custom mold. Tooling cost and lead time are confirmed after drawing review.
What is the typical production and delivery time?
Production time is 10–15 days after sample approval and deposit. Delivery time is also 10–15 days depending on shipping method.
Nearly 20 years of focused hardware manufacturing gives our team deep experience with brass die-casting, multi-stage polishing and consistent electroplating. Engineering support is available from the first drawing review through final QC. Fast sampling, responsive communication and transparent process control help buyers move from prototype to bulk order with fewer surprises. Long-term partners value the ability to lock finishes and tolerances across seasons.
If you already have technical drawings or a physical sample, send them over and we will review feasibility, finish matching and lead time. If you are still evaluating suppliers, we can prepare free stock samples of the current 9 mm brass screw back O-ring stud rivet so you can test ring rotation, weight and plating on your own materials. Looking forward to supporting your next hardware project.
| Field | Specification |
|---|---|
| Product Name | Brass Screw Back O-Ring Stud Rivet |
| Model | DG-RV009 |
| Material | Brass (copper alloy) |
| Weight | 3.45 g |
| Structure | Ball-post head + O-ring / pull ring + matching screw |
| Finish Options | Gold, Antique Brass, Gunmetal, Silver, Black (custom available) |
| Size / Dimensions | Base Ø 9 mm; Screw head Ø 7 mm; Height 5 mm |
| Application | Handbags, purses, wallets, phone cases, leather straps, charms, key fobs |
| Installation Method | Punch hole → insert screw from reverse side → tighten with Phillips screwdriver |
| Manufacturing Process | Die casting / precision machining + polishing |
| Surface Treatment | Electroplating |
| Customization | OEM / ODM – size, finish, logo, packaging |
| Packaging | Pearl Foam + OPP Bag + Export Carton or Customized Packaging |
| MOQ | 2000 pcs (negotiable based on order details) |
| Sample Time | 5–7 Days |
| Production Time | 10–15 Days |
| Delivery Time | 10–15 Days |
