Reference illustration — produced to your drawing
Screws
Captive Screws
A captive screw stays attached to its panel or bracket even when fully loosened, through a shoulder, retainer ring or grommet behind the panel. It cannot be dropped or lost during servicing.
It holds removable covers, front panels and rack hardware in electronics and telecom equipment. Enclosure builders and equipment makers specify it where a loose fastener would fall into the machine.
Standard
To your drawing
Size range
M2 – M6 · #2 – #12
MOQ
From 50 pcs
Lead time
Samples 5–10 days
What we produce
- Retainer ring or shoulder keeps screw captive
- Stainless 304 or carbon steel body
- Knurled head for hand-tight service access
- Thread length sized to the mating standoff
- Zinc or black oxide finish options
Specification notes
- Panel thickness stated with each order
- Retainer style chosen per panel material
- Captive assembly supplied complete
Specifications
Every line below is a starting point, not a limit. Non-standard sizes, special threads and unusual materials are what we do — send the drawing and we confirm what fits.
| Size range | M2 – M6 · #2 – #12 |
|---|---|
| Threads | Metric coarse and fine · UNC · UNF |
| Head / geometry | Pan, flat or knurled head; cross recess, six-lobe or knurled finger drive |
| Materials | Stainless steel 301 / 303 / 304 / 304L / 316 / 316L / 410 / 416 / 17-4PH · carbon steel 1045 / 1215 / 12L14 · alloy steel 4130 / 4140 · aluminium 2024 / 5052 / 6061 / 7075 · brass · bronze · copper · titanium |
| Finishes | As machined · black oxide · zinc plating · nickel plating · chrome plating · anodizing · passivation (through our vetted partner network) |
| Precision | ±0.01 mm on features that locate, seal or fit; ISO 2768-m for general dimensions |
| Marking | Head marking, grade marking or your own identification mark per drawing |
| Documents | Material certificate (MTR) with every batch, plus pre-shipment photos before dispatch |
| MOQ | From 50 pieces per type and material · samples from 1 piece |
| Sample lead time | 5–10 days |
| Production lead time | 25–35 days after sample approval |
| Quote | Within 24 hours, with DFM feedback |
Other screws we manufacture
See all 179 part types →
Send us the drawing
We reply within 24 hours with DFM feedback, a process route and a price. Samples from 1 piece, production from 50 pieces, shipped from Qidong City, Jiangsu Province, China.
Request a quote