
Square Head Plug
‘Teshi Fittings’ Square Head Plugs, meticulously engineered for a diverse range of industries, including Petroleum, Chemical, Hydraulic, Food, and beyond. With precision craftsmanship and adherence to rigorous international quality standards, our Square Head Plugs ensure reliable sealing and effortless integration within piping systems. Committed to excellence and surpassing customer expectations, Teshi Fittings delivers superior performance and durability in every fitting, providing bespoke solutions to meet unique project demands. Count on Teshi Fittings’ expertise for all your piping requirements and encounter the unparalleled quality of our Square Head Plugs.
Standard Specification of Square Head Plug
Square Head Plug Dimensions | ASME 16.11, MSS SP-79, MSS SP-95, 83, 95, 97, BS 3799 |
Square Head Plug Size | 1/8″ NB TO 4″ NB |
Square Head Plug Type | Socket Weld (S/W) & SCREWED (SCRD) – NPT, BSP, BSPT |
DIN | DIN2605, DIN2615, DIN2616, DIN2617, DIN28011 |
EN | EN10253-1, EN10253-2 |
Square Head Plug Production Grades | Stainless Steel, Alloy Steel, Duplex, Nickel Alloys, Low temperature Steel, Carbon Steel, Cupro Nickel |
Square Head Plug Form | Forged Threaded / Screwed Plug, Square Head Plug |
Material & Grades of Square Head Plug
Stainless Steel Square Head Plug | ASTM / ASME A/SA 182 – F 304, 304L, 304H, 309S, 309H, 310S, 310H, 316, 316TI, 316H, 316L, 316LN, 317, 317L, 321, 321H, 347, 347H, 904L. |
Duplex & Super Duplex Steel Square Head Plug | ASTM / ASME A/SA 182 – F44, F45, F51, F53, F55, F60, F61. |
Carbon Steel Square Head Plug | ASTM/ ASME A 105, ASTM/ ASME A 350 LF 2, ASTM / ASME A 53 GR. A & B, ASTM A 106 GR. A, B & C. API 5L GR. B, API 5L X 42, X 46, X 52, X 60, X 65 & X 70. ASTM / ASME A 691 GR A, B & C |
Nickel Alloy Square Head Plug | ASTM / ASME SB 564 / 160 / 472 – UNS 2200 (NICKEL 200), UNS 4400 (MONEL 400), UNS 8825 INCONEL (825), UNS 6600(INCONEL 600), UNS 6601 (INCONEL 601), UNS 6625 (INCONEL 625), UNS 10276 (HASTELLOY C 276), UNS 2201 (NICKEL 201), (ALLOY 20 / 20 CB 3) |
Alloy Steel Square Head Plug | ASTM A182 – F1, F5, F9, F11, F22, F91 |
Copper Alloy Steel Square Head Plug | ASTMA 105/A694/ A350 LF3/A350 LF2 – F42, F46, F52, F56, F60, F65, F70 |
Brass Threaded Square Head Plug | Brass CA 360, CA 345 and CA 377 / SAE J530, SAE J531 and ASA |
Dimension of Square Head Plug

Square Head Plug | ||||
DN | Nom. Pipe Size | A (Min) | B (Min) | C (Min) |
6 | 1/8 | 10 | 6 | 7.15 |
8 | 1/4 | 11 | 6 | 9.55 |
10 | 3/8 | 13 | 8 | 11.11 |
15 | 1/2 | 14 | 10 | 14.29 |
20 | 3/4 | 16 | 11 | 15.88 |
25 | 1 | 19 | 13 | 20.64 |
32 | 1-1/4 | 21 | 14 | 23.81 |
40 | 1-1/2 | 21 | 16 | 28.58 |
50 | 2 | 22 | 18 | 33.27 |
65 | 2-1/2 | 27 | 19 | 38.10 |
80 | 3 | 28 | 21 | 42.86 |
100 | 4 | 32 | 25 | 63.50 |
Manufacturing process and features of Square Head Plug
A square head plug is a type of pipe fitting used in plumbing systems. It’s typically made of materials such as brass, stainless steel, or carbon steel. Here’s an overview of its manufacturing process and features:
Manufacturing Process:
- Material Selection: The manufacturing process begins with selecting the appropriate material based on the application requirements. Common materials include brass, stainless steel, or carbon steel.
- Material Preparation: The selected material is then prepared for the manufacturing process. This may involve cutting the material into the desired size and shape.
- Machining: The machining process shapes the material into the final square head plug design. This involves processes such as turning, milling, drilling, and tapping to create the threads and square head.
- Heat Treatment (Optional): Depending on the material and the desired properties of the square head plug, heat treatment may be applied to improve its strength, hardness, or other characteristics.
- Surface Finishing: After machining, the square head plug may undergo surface finishing processes such as polishing, grinding, or coating to improve its appearance and corrosion resistance.
- Quality Control: Throughout the manufacturing process, quality control measures are implemented to ensure that the square head plugs meet the required specifications and standards.
Features of Square Head Plug :
- Square Head: The distinctive feature of a square head plug is its square-shaped head, which provides a convenient surface for tightening or loosening the plug using a wrench.
- Threaded Ends: Square head plugs typically have threaded ends, allowing them to be easily installed into threaded pipe fittings or openings.
- Variety of Sizes: Square head plugs are available in various sizes to accommodate different pipe diameters and thread specifications.
- Corrosion Resistance: Depending on the material used, square head plugs can offer excellent corrosion resistance, making them suitable for use in diverse environments, including those with exposure to moisture or corrosive substances.
- Versatility: Square head plugs are versatile fittings used in a wide range of applications, including plumbing systems, hydraulic systems, and industrial equipment.
- Durability: Manufactured from robust materials and often designed to withstand high pressure and temperature conditions, square head plugs are durable and long-lasting.
Square head plugs offer seamless integration, leak resistance, high strength, versatility, and compliance with standards, making them essential for various piping applications.
Application Of Square Head Plug
Oil and Gas | Seal pipe ends in pipelines, enhancing safety and preventing leaks. |
Chemical Industry | Ensure safety by sealing pipe ends, reducing the risk of leaks or contamination. |
Plumbing | Prevent blockages by sealing off pipe ends in plumbing systems. |
Heating Systems | Optimize heat transfer and energy efficiency. |
Water Supply | Maintain leak-proof connections in water supply networks. |
Power Plants | Ensure efficient operation and minimize disruptions. |
Paper & Pulp | Maintain efficiency and prevent contamination. |
Food Processing: | Ensure hygiene standards and prevent contamination. |
Structural Pipes: | Secure closures, ensuring structural integrity. |
General Use/Fabrication | Provide versatile sealing solutions for various application |
Square Head Plug Available Types
6000# Threaded Pipe Plug | 3000# Threaded Square Plug |
Threaded Square Head Plug | Forged Square Head Plug NPT |
Stainless Steel Square Head Plug | BS 3799 Threaded Square Plug |
ASTM A182 Threaded SS Square Plug | Duplex Steel Threaded Square Plug |
Titanium Forged Threaded Square Head Plugs | Inconel Threaded Square Head Plugs |
High Nickel Alloy Forged Square Plug | Hastelloy Screwed Square Head Plug |
Super Duplex Steel Screwed Square Plug | Copper Nickel Threaded Square Head Plug |
Carbon Steel Threaded Square Head Plugs | High Pressure Threaded Square Head Plug |
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