snap head
pan head
counter sunk head
conical head
single
double
triple
none of these
18% nickel and 8% chromium
18% chromium and 8% nickel
18% nickel and 8% vanadium
18% vanadium and 8% nickel
Yes
No
Unknown
None
10 m/s
12.5 m/s
15 m/s
20 m/s