This is a custom metal stamping service for shrapnel contacts, spring clips, and precision brackets—produced in our Dongguan factory. You get stamped parts with a tolerance of ±0.01 mm, a standard 15-
This is a custom metal stamping service for shrapnel contacts, spring clips, and precision brackets—produced in our Dongguan factory. You get stamped parts with a tolerance of ±0.01 mm, a standard 15-day lead time, and a hardness range of HV 200–500 depending on material and heat treatment. This is precision manufacturing made in China, without the usual minimum order barrier.
Our high-speed presses (25 to 200 tons) hold a die tolerance of ±0.005 mm during tooling, with production parts at ±0.01 mm for critical dimensions. For shrapnel arms that must deflect consistently, we control the bend radius to within ±0.03 mm. This ensures the contact force stays within 5% of your design value across 1 million cycles. We measure every critical dimension with a CMM and a 2.5D optical projector—reports are included with each batch.
We stock 304 and 301 stainless steel, C17200 beryllium copper, phosphor bronze (C5210), and SPCC/SECC cold-rolled steel. For shrapnel that must survive high temperatures or repeated bending, we recommend 301 stainless in full-hard temper (HV 480–520). Beryllium copper offers HV 360–420 with excellent conductivity. If you need a softer touch, we anneal after stamping to HV 200–250. Raw material thickness ranges from 0.05 mm to 6.0 mm, with a maximum part size of 500 mm × 300 mm.
Stamping alone is rarely enough for a finished shrapnel. We perform stress-relief annealing in a vacuum furnace to prevent springback drift. For surface finish, we offer nickel plating (2–5 µm), gold flash (0.5–1 µm), and tin plating for solderability. Our in-house wire EDM and CNC milling handle any post-stamping features like slots or holes that cannot be punched in one pass. We also offer coining to flatten critical surfaces to a flatness of 0.02 mm over 10 mm length.
For progressive dies, we use tungsten carbide inserts on wear zones—this gives 10–15 million strokes before resharpening. For short-run prototypes, we use a simplified punch-and-die set with a tooling cost of $800–$1,500 and a lead time of 5–7 days. This is the fastest way to test your shrapnel design without committing to a full production die. When you are ready for mass production, we amortize the die cost into the unit price—no upfront tooling charge for orders above 100,000 pieces.
Every lot gets a first-article inspection (FAI) before production runs. We check 4 points on every shrapnel: material thickness, bend angle, surface roughness (Ra 0.4–0.8 µm), and contact force (measured with a load cell). In-process checks happen every 30 minutes on the press line. We provide a full dimensional report in PDF or Excel format with each shipment. For automotive or medical customers, we can include PPAP Level 3 documents at no extra charge.
Parts are packed in anti-rust VCI paper and then placed in corrugated boxes or custom trays to prevent bending during transit. Standard export packing takes 24 hours after QC. From our Dongguan factory, air freight to the US West Coast takes 3–5 days; sea freight to Hamburg or Los Angeles takes 18–25 days. We handle all export documentation, including CO, FTA, and commercial invoices. For urgent orders, we can ship a 500-piece sample batch by DHL Express within 48 hours of your drawing approval.
Here is the honest pricing structure: tooling cost is separate from piece price. For a simple shrapnel (2 bends, 1 hole), the piece price is $0.02–$0.08 at 50,000 pieces. At 500,000 pieces, it drops to $0.01–$0.03. We do not enforce an MOQ—you can order 100 pieces for testing at a slightly higher unit price. This no MOQ policy lets you validate your design with real production tooling before scaling up. We also offer a 3% discount on annual blanket orders with scheduled releases.
| Specification | Value / Range | Notes |
|---|---|---|
| Material thickness | 0.05 – 6.0 mm | 304 SS, C17200 BeCu, C5210, SPCC |
| Part size (max) | 500 × 300 mm | Larger parts via progressive die |
| Dimensional tolerance | ±0.01 mm | Critical dimensions, CMM verified |
| Bend radius tolerance | ±0.03 mm | For shrapnel deflection consistency |
| Surface roughness (Ra) | 0.4 – 0.8 µm | As-stamped; polishing available |
| Hardness (after heat treat) | HV 200 – 520 | 301 full-hard or annealed |
| Plating options | Ni 2–5 µm, Au 0.5–1 µm, Sn | RoHS compliant |
| Standard lead time | 15 days | From drawing approval to shipment |
| Prototype tooling | 5 – 7 days | $800 – $1,500 tooling cost |
| MOQ | No minimum | 100-piece test orders accepted |
For 301 stainless in half-hard temper, the minimum bend radius is 1× material thickness; for beryllium copper, it is 0.5× thickness.
Yes, we regularly stamp 0.05 mm phosphor bronze for contact springs, but we recommend a relief anneal to prevent edge fractures.
We over-bend by 2–5 degrees in the die and then use coining on the bend line to set the final angle within ±0.5 degrees.
DHL Express from Dongguan to most countries takes 2–4 days; we ship 500 pieces or less within 48 hours of drawing approval.
Send your STEP, IGES, or PDF drawing to sc@bquq.com, or message us on WhatsApp at +86 13713157787. Include the material grade, required hardness, and annual volume. We will reply with a firm quote within 12 hours (during working days). If you need a sample, we can make a single-piece prototype in 3 days. Do not forget to review our CNC cutting tool selection guide and CNC machining tolerances guide for related precision insights. For China Dongguan Hardware Stamping Parts and Shrapnel, BQUQ is your direct factory source—no middlemen, no MOQ.
| 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 |
