NPT Square-Head Plug — Class 150 (304 & 316 Stainless Steel)
Square-head male NPT pipe plug for closing female-threaded ports in low- to medium-pressure stainless steel piping. Offered in Class 150 304 and 316 stainless steel across nominal pipe sizes from 1/8" to 4".
Material options | 304 / 316 |
|---|---|
Connection | Male NPT Thread with Square Drive Head |
Pressure class | Class 150 |
Nominal size range | 1/8"–4" |
Construction | Cast stainless steel male-threaded plug with square drive post (Class 150) |
Size
Product overview
Construction, Pressure Class & Material Grades
Designed with Male NPT Thread with Square Drive Head geometry (Cast stainless steel male-threaded plug with square drive post (Class 150)), this threaded stainless steel fitting joins mating tapered NPT pipe threads along metal-to-metal thread flanks. Manufactured as a 150 lb investment-cast stainless steel fitting series in 304 / 316 stainless steel.
Series Size Coverage & Thread Make-Up
Nominal pipe thread sizes span 1/8"–4" across the series; available size options and envelope dimensions vary by stainless steel grade. Verify mating NPT thread specifications and consult the dimensional table for the selected size row before ordering.
Technical specifications
Dimensional Reference · Class 150 · 304 & 316 Stainless Steel (1/8"–4")
Class 150 · 304 & 316 stainless steel · 1/8"–4"
Units: inches
| Specification reference | Nominal Size | F (IN) | G (IN) |
|---|---|---|---|
| CH-F108-013 | 1/8" | 0.71" | 0.28" |
| CH-F108-014 | 1/4" | 0.75" | 0.35" |
| CH-F108-015 | 3/8" | 0.79" | 0.39" |
| CH-F108-016 | 1/2" | 0.91" | 0.51 |
| CH-F108-017 | 3/4" | 1.18" | 0.71 |
| CH-F108-018 | 1" | 1.3" | 0.75" |
| CH-F108-019 | 1-1/4" | 1.54" | 0.91 |
| CH-F108-020 | 1-1/2" | 1.58" | 1.02 |
| CH-F108-021 | 2" | 1.77" | 1.14" |
| CH-F108-022 | 2-1/2" | 1.89 | 1.58 |
| CH-F108-023 | 3" | 2.13" | 1.73" |
| CH-F108-024 | 4" | 2.32 | 2.32 |
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