RUI’AN / SPRING CONTACTSSpring contacts
4 mm Drum spring contacts · P21-11
Spring insert dimensions from the catalog specification table.
Request a quotationInclude your drawing and quantity for a product-specific quotation.
Product details
- Catalog reference
- P21-11
- Mating pin diameter
- 4 mm
- Opening diameter
- 3.15 mm
- Drum diameter
- 4.6 mm
- Length
- 12 mm
- Material thickness
- 0.2 mm
Configurations & dimensions.
| Catalog reference | Mating pin diameter | Opening diameter | Drum diameter | Length | Material thickness |
|---|---|---|---|---|---|
| P21-01 | 1.5 mm | 1.2 mm | 1.78 mm | 8 mm | 0.1 mm |
| P21-02 | 2 mm | 1.6 mm | 2.3 mm | 6 mm | 0.1 mm |
| P21-03 | 2.5 mm | 2.2 mm | 2.8 mm | 8 mm | 0.15 mm |
| P21-04 | 2.5 mm | 2.2 mm | 3 mm | 8 mm | 0.15 mm |
| P21-05 | 2.5 mm | 2.2 mm | 2.8 mm | 6.5 mm | 0.15 mm |
| P21-06 | 2.9 mm | 2.7 mm | 3.3 mm | 8 mm | 0.15 mm |
| P21-07 | 3 mm | 2.7 mm | 3.45 mm | 8 mm | 0.15 mm |
| P21-08 | 3.5 mm | 3.2 mm | 4 mm | 5 mm | 0.15 mm |
| P21-09 | 3.5 mm | 3.2 mm | 4 mm | 5.6 mm | 0.15 mm |
| P21-10 | 4 mm | 3.15 mm | 4.8 mm | 12 mm | 0.2 mm |
| P21-11 | 4 mm | 3.15 mm | 4.6 mm | 12 mm | 0.2 mm |
| P21-12 | 4 mm | 3.15 mm | 4.5 mm | 8 mm | 0.2 mm |
APPLICATIONS
Applications
- Electronics
- Power connections
- Test equipment
START A QUOTATION
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Share a dimensioned drawing, material, finish, required quantity and any critical features. For connector contacts, include the mating interface and electrical requirements.
Samples typically take 7–10 days and production 10–15 days, subject to the final specification and order.
EXPLORE THE RANGE
Configurations & dimensions.
Compare the configurations below, then send your selected part and requirements for a quotation. Select a product image to enlarge it.
View original dimension sheets & reference pages
Original reference documents retain their source language.
Check the units shown on each drawing. Our team will confirm the dimensions, material and finish for your selected part before production.
Open the full catalog (original PDF, 12 MB) ↗CUSTOM PART QUOTATIONS





