Grabber makes a self tapping high/low thread screw which I recommend for wire lathe...should be fine for vinyl siding. It is 1 5/8" with a large flat head and utilizes their LOX series drivers.

Wwe have had success using these available from Best Materials LLC.  Go to http://www.bestmaterials.com/detail.aspx?ID=10007 to view the web page.

#8 X 1-5/8" RWH TEK, LATH SCREW (1000) TEK8X158RWH $39.78 SALE $28.85 (Savings: $10.93)

#8 X 1-5/8" RWH (Modified Truss Head) TEK ( LATH SCREW). ZINC PLATED. PRICE PER 1000. Similar terms: K-lath, wafer k-lath, round washer head, rwh tek, tek

I like the look of Spencer's screws. A non-tapered head is a must. Vinyl siding needs to be "hung" not fastened. The plastic expands and contracts so the siding needs to be able to slide in the slots.

Hello I am new to this great forum. I found a product that does not use screws or nails to attach vinyl siding. It is a steel vertical strip that the siding clips onto. Has anybody ever heard of a product like this. It also I believe has a 1/4 drainage plane (rainscreen) to drain the moisture.

Not that I do siding, but I am interested in the knowing more about this product...and how it attaches to the ICF

Attaching vinyl too tightly leads to popping noises when it expands.  Maybe this new attachment system will allow the vinyl to float with expansion and contraction.  However, I would have some concern with having only 1/4" space for a rainscreen.  I believe a rainscreen should be at least 1/2".

I believe that the steel strips are attached with screws

 " However, I would have some concern with having only 1/4" space for a rainscreen.  I believe a rainscreen should be at least 1/2"." According to building science experts such as (Joseph Lstiburek) 1/4" is the minimum required for a capillary break. Plus the hollow back siding creates a larger airspace.

Here is a problem with the lath screws. THEY RUST.
I have located stainless steel lath screws but they are $400.00 per 1,500
Not my house not my money but I still cannot spend that much for screws. I have experimented today with ring shank ALUMINUM roofing nails today and they grab very well. At the moment I plan to use a combo of those nails and a few stainless sheetmetal screws ($14.00 per 100). The sheetmetal screws have a smaller head but still work. They do not self tap very well but pre drilling with 1/8 bit has not been too bad so far.
I will update as I really get into it.