ASME B1.20.1 Stainless Steel Pipe Fittings Hexagon Head Threaded Plug ASTM A351
ASME B1.20.1 ASTM A351 Stainless Steel Hexagon Head Threaded Plug
Stainless Steel Casting Screw Fittings
A Hexagon Head Threaded Plug is a type of pipe fitting used to seal the end of a pipe or fitting in plumbing and piping systems.The hexagon head threaded plug is designed to close off the end of a pipe or fitting securely in a threaded system.Widely used in plumbing, industrial, and commercial systems where temporary or permanent closure of threaded openings is needed.
Secure Closure: Provides a tight and leak-free seal when properly installed.
Product Information
| Product Name | ASME B1.20.1 ASTM A351 Stainless Steel Hexagon Head Threaded Plug |
| Thread Types | ASME B1.20.1(NPT), BS 21 (NSPT), DIN2999/259 |
| Dimensions | ISO 49-1994(E), MSS SP-114, ANSI B16.3 |
| Size Range | 1/8” to 4” |
| Pressure Class | Class 150, 1000, 2000, 3000, 6000 and 9000 |
| Materials | ASTM A351 (CF8, CF8M), JIS(SCS13, SCS14), AISI (304/L,316/L), ASTM A182/A276 (304/L, 316/L), |
ASTM A351 CF8 and CF8M
ASTM A351 CF8 and CF8M are austenitic stainless steel, exhibit good strength and ductility. CF8/CF8M are widely applied in pump and valve, marine, chemical processing, food processing industries, CF8 is also be applied in nuclear and defense industries.
ASTM A351 CF8/CF8M Chemical Composition (%)
| Grade | C | Mn | Cr | Mo | Ni | Fe | Cu |
| CF8 | 0-0.08 | 0-1.5 | 18-21 | 0-0.5 | 9-11 | Bal | 0.00-0.00 |
| CF8M | 0-0.08 | 0-1.5 | 18-21 | 2-3 | 9-12 | Bal | 0.00-0.00 |
ASTM A351 CF8/CF8M Mechanical Properties
| Grade |
Tensile Strength (ksi) |
Yield Strength (ksi) |
Elongation (%) |
Hardness (Brinell) |
| CF8 | 0.00-70 | 30 | 35 | 134-196 |
| CF8M | 0.00-70 | 30 | 30 | 146-212 |
ISO 49-1994(E) dimensions of Caps and Plugs (mm)
| Fitting Sizes (inch) | Dimensions (mm) | ||||||
| T1 | T8 | T9 | T11 |
a min |
b min |
c min |
d min |
| (⅛) | ⅛ | ⅛ | — | 13 | 11 | 20 | — |
| ¼ | ¼ | ¼ | — | 15 | 14 | 22 | — |
| ⅜ | ⅜ | ⅜ | (⅜) | 17 | 15 | 24 | 11 |
| ½ | ½ | ½ | (½) | 19 | 18 | 26 | 15 |
| ¾ | ¾ | ¾ | (¾) | 22 | 20 | 32 | 16 |
| 1 | 1 | 1 | (1) | 24 | 23 | 36 | 19 |
| 1¼ | 1¼ | 1¼ | — | 27 | 29 | 39 | — |
| 1½ | 1½ | 1½ | — | 27 | 30 | 41 | — |
| 2 | 2 | 2 | — | 32 | 36 | 48 | — |
| 2½ | 2½ | 2½ | — | 35 | 39 | 54 | — |
| 3 | 3 | 3 | — | 38 | 44 | 60 | — |
| 4 | 4 | 4 | — | 45 | 58 | 70 | — |
Benefits of Stainless Steel Casting Screw Fittings
- Stainless steel casting combines good corrosion resistance and high strength, which allows the reduction in wall thickness and weight of pipe fittings. Besides, it can withstand very high flow rates, making it capable to withstand long-term exposure to the elements in almost any environment.
- Cast stainless steel pipe fittings can be used in all types of water, including drinking water in public supply. They have an excellent resistance to the full range of potable waters, including various chloride levels. At the end of its useful life, cast stainless steel is fully recyclable and retains a higher residual scrap value than ordinary cast steel.
- Stainless steel casting of pipe fittings requires low maintenance and does not need an additional coating, in both indoor and outdoor applications. The expected lifetime of a stainless steel pipe fitting is more than 50 years, reducing system down time, replacement and maintenance costs over the life of the installation.
- Last but not the least, stainless steel casting is afforable to produce any type of pipe fittings, and it can produce pipe fittings in both high and small volumes.
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