ICT/FCT Spring Test Probes · F723, F733, F734, F735, F737
F737 ICT/FCT Test Probe
F737 is an ICT/FCT test probe series in the EMSGLOB range, listed under F723, F733, F734, F735, F737. It suits a minimum pitch of 4.00 mm / 157 mil, measures 57.3 mm in total length and offers 12 mm of working travel.
Electrically it is specified for a rated current of 10 A, a typical resistance of 25 mΩ and an operating range of -45 °C to +100 °C. There are 5 catalogue part numbers in this series, covering 2 tip or head styles such as 06, 16. The plunger is beryllium copper with gold plating, and the barrel is brass with gold plating.

Specifications
| Structure | Basic Contact Probe |
|---|---|
| Pitch | 4.00 mm / 157 mil |
| Operating temperature | -45 °C to +100 °C |
| Total length | 57.3 mm |
| Protrusion height | 19.3 mm |
| Barrel diameter | 2.65 mm |
| Press ring diameter | 3.6 mm |
| Collar diameter | 3.6 mm |
| Plunger material | Beryllium copper |
| Plunger plating | Gold |
| Barrel material | Brass |
| Barrel plating | Gold |
| Spring material | Spring steel |
| Spring plating | Silver |
| Nominal travel | 12 mm |
| Maximum travel | 14.3 mm |
| Pointing accuracy | ± 0.15 mm |
| Continuous current | 10 A |
| Typical contact resistance | 25 mΩ |
| Thread | M2 |
| Tool size | 3.0 mm |
| Tip style diameter (range) | 1.8 – 4 mm |
| Preload (range) | 60 – 80 cN |
| Spring force (range) | 150 – 300 cN |
Values as listed for this series. Confirm the exact data for your part number with your quotation.
Applications
- In-circuit testing (ICT) of assembled PCBs
- Functional testing (FCT) of modules and finished boards
- Bed-of-nails test fixtures and adapters
- Contacting pads, vias, pins and wire-wrap posts
- Threaded, push-back and anti-rotation designs for special fixture layouts

Part numbers (5)
| Part number | Tip style | Tip style diameter | Spring force | Preload |
|---|---|---|---|---|
| F73706B180G300 | 06 | 1.8 mm | 300 cN | 80 cN |
| F73706B300G150 | 06 | 3 mm | 150 cN | 60 cN |
| F73706B300G300 | 06 | 3 mm | 300 cN | 80 cN |
| F73706B400G300 | 06 | 4 mm | 300 cN | 80 cN |
| F73716B180G300 | 16 | 1.8 mm | 300 cN | 80 cN |
FAQ
What pitch and length is F737?
F737 has a pitch of 4.00 mm / 157 mil, total length of 57.3 mm and protrusion height of 19.3 mm. The full dimension list is in the specification table on this page.
How much current can F737 carry?
The rated continuous current is 10 A, with a typical resistance of 25 mΩ.
Which part numbers and tip styles are available for F737?
5 part numbers are listed, for example F73706B180G300, F73706B300G150, F73706B300G300. Tip or head styles include 06, 16. The table on this page lists every part number with its tip and spring data.
What temperature range is F737 rated for?
F737 is specified for -45 °C to +100 °C.
How do I get a price or sample for F737?
Send the part number, quantity and your application to sales@emsglob.com or call +91-7383235369, or use the enquiry form on the contact page. Prices are quoted per enquiry.
More ict/fct spring test probes
Enquire / Request a quote
Tell us the F737 part number, the quantity and your pitch, travel and current requirements, and the EMSGLOB team will reply with availability and a quotation. Drawings in STEP, IGES, PDF, DWG, DXF or ZIP are welcome.