IFI 148 Threaded Projection Weld Studs
IFI-148 covers threaded projection weld studs in several configurations. Drawing shows threaded shank and integral weld projections.
Selected Type U3 dimensions (in)
| Thread | TPI | dk max | dk min | k max | k min | h max | h min |
|---|---|---|---|---|---|---|---|
| #6 | 32 | .323 | .303 | .052 | .042 | .022 | .018 |
| 1/4 | 20 | .575 | .550 | .083 | .073 | .042 | .038 |
| 3/8 | 16 | .880 | .850 | .114 | .104 | .052 | .048 |
| 1/2 | 13 | 1.005 | .975 | .146 | .136 | .062 | .058 |
Selected Type U3 values only. IFI-148 also covers other types; do not use this schedule for T3, TD or another projection pattern.