NPT Countersunk Hex-Socket Plug — Class 150, 316 Stainless Steel
Countersunk internal hex-socket male NPT pipe plug for flush port closure where external wrench clearance is restricted. Supplied in Class 150 316 stainless steel across nominal sizes from 1/8" to 2".
Material options | 316 stainless steel |
|---|---|
Connection | Male NPT Thread with Internal Hex Socket (Allen Drive) |
Pressure class | Class 150 |
Nominal size range | 1/8"–2" |
Construction | Flush-seating cast 316 stainless steel plug with countersunk hex socket (Class 150) |
Size
Product overview
Construction, Pressure Class & Material Grades
Designed with Male NPT Thread with Internal Hex Socket (Allen Drive) geometry (Flush-seating cast 316 stainless steel plug with countersunk hex socket (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 316 stainless steel stainless steel.
Series Size Coverage & Thread Make-Up
Nominal pipe thread sizes span 1/8"–2" 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 · 316 Stainless Steel (1/8"–2")
Class 150 · 316 stainless steel · 1/8"–2"
Units: inches
| Specification reference | Size | Countersunk Length (J) | Countersunk Hex Socket (K) |
|---|---|---|---|
| CH-F090-001 | 1/8" | 0.280"/0.260" | 0.193"/0.188" |
| CH-F090-002 | 1/4" | 0.425"/0.395" | 0.255"/0.250" |
| CH-F090-003 | 3/8" | 0.425"/0.395" | 0.318"/0.313" |
| CH-F090-004 | 1/2" | 0.560"/0.520" | 0.380"/0.375" |
| CH-F090-005 | 3/4" | 0.570"/0.530" | 0.568"/0.563" |
| CH-F090-006 | 1" | 0.710"/0.670" | 0.630"/0.625" |
| CH-F090-007 | 1-1/4" | 0.730"/0.690" | 0.755"/0.750" |
| CH-F090-008 | 1-1/2" | 0.840"/0.800" | 1.005"/1.000" |
| CH-F090-009 | 2" | 0.90"/0.870" | 1.005"/1.000" |
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