For a contemporary look, the combination of an AMPG button head barrel with a button head screw delivers a stylish look in applications where both heads are exposed.
These mating components provide both strength and versatility, and are used in construction, marine and transportation. They consist of a socket drive barrel and a socket drive screw with complimentary sized heads engineered to spread the load across a wide area. The screws are available with or without a shoulder.
Accurate Manufactured Products Group offers stock button head sex bolts made from durable and corrosion-resistant stainless steel. Stock parts are readily available in Type 303 and 316 stainless steel. Custom lengths and diameters as well as other materials are always available.
All AMPG button heads have a beautiful machined finish and are USA made in the heart of Indiana.
The following charts show readily available stock parts in 18-8 stainless steel. Custom lengths and diameters as well as other materials are always available.
Size Chart Button Head Socket Drive—Male Mating ScrewsShoulder Dia
Length Under HeadSholder LengthThread SizeHead DiaHead HtHex Key SizeOrder #1/41/4None10-241/41/85/32Z18381/21/410-241/41/85/32Z176811/210-241/21/85/32Z17693/83/8None1/4-203/83/167/32Z18403/41/41/4-201/23/167/32Z162411/21/4-201/23/167/32Z17701/21/2None3/8-161/21/45/16Z184211/23/8-161/21/45/16Z17721-1/213/8-161/21/45/16Z177421 1/23/8-161/21/45/16Z17765/81/2None1/2-131/25/163/8Z184411/21/2-131/25/163/8Z17781-1/211/2-131/25/163/8Z178021 1/21/2-131/25/163/8Z17823/41/2None5/8-111/23/83/8Z184611/25/8-111/23/83/8Z17841-1/215/8-111/23/83/8Z178621 1/25/8-111/23/83/8Z17887/81/2None5/8-111/23/83/8Z184811/25/8-111/23/83/8Z17901-1/215/8-111/23/83/8Z179221 1/25/8-111/23/83/8Z1794
- Type 303, 316, and 17-4 PH Stainless Steel, Type 6061-T6 Aluminum, Grade 405 Monel, Grade 2 Titanium, Brass, Alloy A286, Alloy Steel 4140
MATERIAL Minimum Rockwell Hardness Typical Tensile Strength (PSI) Magnetic? Typical Yield Strength (PSI) Reasons to Use Type 303 Stainless Steel (also known as 18-8) B83 85,000 Mildly 30,000 Type 303 (18-8) stainless steel offers excellent corrosion resistance. The most widely used stainless steel used in chemical and food processing equipment. Type 316 Stainless Steel B83 70,000 Mildly 25,000 Type 316 stainless steel offers more corrosion resistance than 303 stainless steel. Widely used in chemical processing and marine enviroments, as the molybdenum in 316 stainless steel has higher resistance to chlorides. Type 17-4 PH Stainless Steel C28 135,000 Yes 100,000 Type 17-4 PH stainless steel alloy combines the high strength of alloy steel with the corrosion resistance of 18-8 stainless steel. Maintains corrosion resistance at high temperatures. Commonly used material for pump shafts, oil patch, mechanical components and seals. Type 6061-T6 Aluminum B40 42,000 No 37,000 Aluminum has the strength of mild steel with one third the weight. Alloy 6061 offers the combination of strength and atmospheric corrosion resistance. It is the most widely used aluminum alloy material. Commonly used for fittings, hardware, fasteners and many other products used in transportation and construction. Grade 405 Monel B60 70,000 No 25,000 Monel also known as nickel-copper alloy 400 is resistant to corrosion and acids. It is commonly used in applications with highly corrosive conditions. Best for use in sea water and high temperature applications. Monel’s corrosion resistance makes it ideal for marine applications such as propeller shafts, piping systems, pump shafts, seawater valves, trolling wire, fuel tanks and strainer baskets. Monel is a popular marine industry material. Grade 2 Titanium B80 45,000 No 40,000 Titanium is used mostly for it’s high strength to weight ratios. It is significantly lighter than steel yet offers equivalent strength properties. It is highly resistant to chemical environments, and it’s capable of withstanding attack by dilute sulfuric acid, hydrochloric acid, chlorine gas, chloride solutions, and most organic acids. Industrially, titanium is often the material of choice for heat exchangers, tanks, process vessels and valves. It is a material commonly used by the marine, aerospace and auto racing markets. Brass B55 55,000 No 40,000 Brass is made from approximately two-thirds copper and one-third zinc. It offers good resistance to rust and atmopheric corrosion. Brass is a softer material than stainless steel and is often used for decoration for its bright gold color appearance. Brass is selected for applications where low friction is required such as locks, gears, bearings, doorknobs, ammunition casings and valves. Alloy A286 C31 140,000 No 90,000 Super Alloy A286 is approximately 26% nickel and 15% chrome; this iron-based super alloy provides the strength of alloy steel with corrosion resistance of stainless steel. It is heat treatable. Annealed cold rolled A286 has a Rockwell hardness of B85, minimum tensile strength of 85,000 psi and minimum yield strength of 35,000 psi. When heat-treated A286 alloy can achieve higher strength properties. Such as high-strength bolts that meet ASTM A453 Grade 660 that can provide minimum tensile strength of 140,000 psi, minimum yields of and minimum Rockwell of C31. Alloy Steel 4140 C39 100,000 Yes 90,000 Alloy Steel 4140 is a “primary” fastener material selected for screws and bolts designed for highly-stressed applications. High-strength screws such as socket head cap screws made to ASTM A574 and metric class 12.9 material property standards provide strength properties comparable to Grade 8steel, but only after heat treatment. Most standard alloy steel fasteners are used primarily in machine tools and similar applications and are generally not selected for use in corrosive environments-they are better suited for in-doors use.
- Platings of all types, laser marking on exposed heads with logos, lettering, designs, etc.