This is the BQUQ Stamped Metal Hooks Latches Clasps Collection: a family of precision-stamped fastening components produced on 25-ton to 160-ton CNC-controlled presses. You get dimensional repeatabil
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This is the BQUQ Stamped Metal Hooks Latches Clasps Collection: a family of precision-stamped fastening components produced on 25-ton to 160-ton CNC-controlled presses. You get dimensional repeatabil
This is the BQUQ Stamped Metal Hooks Latches Clasps Collection: a family of precision-stamped fastening components produced on 25-ton to 160-ton CNC-controlled presses. You get dimensional repeatability at ±0.05 mm, surface finish down to Ra 0.8 µm, and a standard lead time of 10–15 days from drawing approval to shipment—no tooling surprises, no hidden MOQ.
Stamping thin metal without warping is a geometry problem, not just a force problem. Our dies use hardened D2 tool steel with precision ground pilots, and we run progressive dies at 60–120 strokes per minute. This gives you hook openings, latch slots, and clasp fingers that stay within ±0.05 mm across a 10,000-piece batch. For critical features like a latch's return spring tang, we add a secondary coining step to eliminate spring-back—a real issue with 301 stainless at 0.4 mm thickness.
You will not find mystery alloys here. We stock and certify: AISI 301 full-hard stainless (yield 1,200 MPa), AISI 1075 spring steel (hardened to 45–48 HRC), C2680 brass for corrosion-resistant clasps, and 5052 aluminum for lightweight latches. For spring steel parts, we austenitize at 830°C, oil quench, then temper at 350°C to achieve a spring temper of 44–47 HRC with zero decarburization—verified by microhardness testing on every heat lot. If you need a different alloy, we source certified coils within 3 days.
Hooks and clasps see high annual volumes. Our dies are built for 2–5 million hits before regrinding. We use CNC wire-cut inserts for the cutting edges and apply a titanium nitride coating on forming punches. This means your per-piece price does not drift after the first year—we quote a fixed cost per thousand for the life of the die. Tooling maintenance is scheduled every 200,000 strokes, and we keep a spare set of critical punch inserts in-house to avoid downtime.
Raw stamping leaves a burr on the break edge. For user-facing hooks and clasps—think backpack buckles or cabinet latches—that burr is unacceptable. We use a fine-blanking process for edges above 0.8 mm thick, giving a 100% sheared surface with a maximum burr of 0.03 mm. For thin parts, we tumble with ceramic media for 45 minutes, then passivate stainless parts to remove free iron. Final surface finish is Ra 0.8 µm on mating surfaces, Ra 1.6 µm on non-critical faces. No sharp edges, no plating adhesion failures.
Every lot, regardless of size, goes through the same gate. We check: dimensional profile on a CMM (Zeiss Contura) with a 0.001 mm resolution, hardness on a Rockwell tester (HRC scale) for every 500 pieces, and surface finish with a Mitutoyo profilometer. We also test hook opening force with a digital pull gauge—for example, a latch must open at 5.0 N ± 0.5 N and close without play. You receive a full inspection report (PDF) with each shipment, including material certificates and heat treatment curves.
We are a made in China factory that does not force you into a 50,000-piece commitment. You can order 200 pieces for a field trial, or 200,000 for full production. Our die costs are transparent: a simple hook die starts at $800, a multi-stage progressive die for a complex clasp at $3,500. Amortized tooling is optional—many customers prefer to own the die and take it to any future supplier. We quote both ways, and the difference is usually 10–15% on piece price.
| Specification | Value / Range |
|---|---|
| Material options | 301 SS, 1075 spring steel, C2680 brass, 5052 Al |
| Thickness range | 0.2 mm – 3.0 mm (fine-blanking up to 6.0 mm) |
| Hardness (spring steel) | 44–48 HRC (tempered) |
| Hardness (stainless) | As-rolled 380 HV or annealed 180 HV |
| Dimensional tolerance | ±0.05 mm on critical features, ±0.10 mm general |
| Surface finish Ra | 0.8 µm (mating), 1.6 µm (cosmetic) |
| Maximum burr | 0.03 mm (fine-blanked) |
| Flatness | 0.02 mm per 25 mm length |
| Lead time (prototype) | 5–7 days (no tooling) |
| Lead time (production) | 10–15 days after drawing approval |
| MOQ | No MOQ—200 pieces accepted |
| Packaging | Anti-corrosion VCI paper, export carton |
No MOQ—we accept 200 pieces for prototypes or field testing, and scale to 200,000+ with the same tolerance and lead time.
Yes, we source certified coils for any alloy specified—including 17-7 PH, Inconel, and beryllium copper—with a 3-day material procurement lead time.
We use SPC on every press stroke, checking critical dimensions every 200 pieces, and a final CMM audit on 5 random samples per 1,000 pieces before shipment.
With an existing die, we ship in 7 days; with a new simple die, 12 days total—including tooling, sampling, and your approval.
Do not leave bend radius to us. For a 90° hook in 1.0 mm 301 stainless, the minimum inside radius is 0.5 mm—anything sharper causes micro-cracks. Specify the grain direction if the hook takes side loads; we roll the coil so grains run along the stress axis. Also, state whether the latch is spring-loaded or gravity-driven—this changes the temper requirement. If you are unsure about tolerances, our CNC machining tolerances guide explains what is achievable in stamping vs. machining. For cutting tools used in any secondary operations, refer to our CNC cutting tool selection guide.
Send your drawing (PDF, STEP, or IGES) with material and quantity. We reply with a firm piece price, die cost (if any), and a confirmed delivery date—within 12 hours on business days. No vague estimates, no "call us" games. Email sc@bquq.com or WhatsApp +86 13713157787. Your Stamped Metal Hooks Latches Clasps Collection order starts with a single message.
| Parameter | Capability |
|---|---|
| Materials | SPCC, SGCC, SUS301/304/316, brass, copper, beryllium copper, phosphor bronze |
| Process | Progressive die stamping, fine blanking, deep drawing, bending, tapping |
| Tolerance | ±0.01mm standard, ±0.005mm on request |
| Surface | Zinc plating, nickel, tin, gold, powder coating, passivation, anodizing |
| Die Size | Up to 1200 x 800 mm, 16-250 ton presses |
| Thickness | 0.05 - 6.0 mm sheet metal, wire 0.1 - 8.0 mm |
| Prototype | 7-15 days tooling, no MOQ on samples |
| Inspection | Full report per batch, CMM and optical measurement |
