ASTM B366 Forged Alloy Steel Hex Head Plug Male Thread 1/4"–1" Fitting
Product Description
These hex head pipe plugs are forged from high-quality alloy steel in strict compliance with ASTM B366 standard. Available in sizes 1/4 inch, 3/8 inch, 1/2 inch and 1 inch with male threaded connection, they feature high strength, good pressure resistance and reliable sealing performance. Widely used for pipe end sealing, pressure testing and system maintenance in petroleum, chemical, oil and gas and high-pressure industrial piping systems.
Key Parameters
- Material: Alloy Steel
- Standard: ASTM B366
- Type: Forged Hex Head Pipe Plug
- Connection: Male Threaded
- Size: 1/4", 3/8", 1/2", 1"
- Features: Forged, high strength, male thread, hex head, good sealing
- Application: Industrial piping, pressure test, pipe end sealing
Application
Widely applied in petrochemical plants, refineries, natural gas pipelines, offshore platforms, pressure equipment and high-pressure piping systems. Suitable for threaded port sealing and temporary or permanent plugging in various industrial process pipelines.
Product Advantages
- Comply with ASTM B366 standard, stable material properties and reliable quality
- Forged process ensures compact structure, high pressure bearing and long service life
- Male thread design for easy installation, firm connection and good sealing
- Hex head allows convenient installation and disassembly with standard tools
- Complete sizes 1/4", 3/8", 1/2", 1" to meet different pipeline requirements
- Excellent corrosion and high temperature resistance for harsh working conditions
Installation & Use
Check thread and surface condition before installation; clean the thread and apply sealant; use a hex wrench to tighten the plug into the matching female port; ensure proper torque to achieve reliable sealing.
Precautions
Avoid collision and thread damage during transportation; store in dry and ventilated environment; use within rated pressure and temperature; select correct thread size and standard.
Delivery
Ship within 7–15 working days after order confirmation; by sea, air or express; tracking number provided.
Payment Terms
T/T, L/C, Western Union, PayPal; 30% deposit, balance before shipment.
Packing
Plastic bag + carton / wooden case; anti-rust, shockproof and suitable for long-distance transportation.
Product Description
| Type |
Plug |
| Brand |
TOBO |
| Head Code |
Hexagon |
| Size |
1/2'~50'(DN10~DN1200), Customized size accepted |
| Material |
Carbon steel: 10#, 20#, 45#, ASTM A105 etc. |
| Alloy steel: ASTM A234 GR.WPB,ASTM A182 GR.F22/F11 CL2/CL3, ASTM A234 GR.WP11/WP22 CL.2/CL.1 |
| Stainless steel: SS304, SS304L, SS304H, SS321, SS316, SS316L, SS310S, 904L, 254SMO , 253MA etc. |
| Duplex: 2205, 2507, F55 etc. |
| Nickle Alloy:Hastelloy C276, Inconel 601,Inconel 625, Inconel 718, Monel 400, Monel K500 etc. |
| Copper Nickel: CuNi 90/10, CuNi 70/30 |
| Standard |
AASME,ASTM,MSS,JIS,DIN,EN |
| Connection |
Male |
| Wall Thickness |
Sch5X~SchXXS |
| Technics |
Forged |
| Surface treatment |
Transparent oil, rust-proof black oil or hot galvanized Packing wooden case, pallet or as customers' requirement |
| Applications |
Petroleum, chemical, power, gas, metallurgy, shipbuilding, construction, etc |
| Advantages |
1. 20 + years of production experience at your service.
2. The fastest delivery
3. The lowest price
4. Most comprehensive standards and materials for your choice.
5. 100% export.
6. Our products EXPORT to Africa, Oceania, mid east, eastern Asia, Western Europe etc. |
Product show

Why Choose Us?
1. 20 + years of production experience at your service.
2. The fastest delivery
3. The lowest price
4. Most comprehensive standards and materials for your choice.
5. 100% export.
6. Our products export to Africa, Oceania, mid east, eastern Asia, Western Europe etc.
Packing & Shipping
Packaging Details: Pallet/Wooden Case or as per your Specification
Delivery Detail: Shipped in 30 days after payment
FAQ
Q: Are you trading company or manufacturer ?
A: We are factory.
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=10000USD, 100% in advance. Payment>=10000USD, 50% T/T in advance ,balance before shippment.