UNS Bolts | McMaster-Carr

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274 Products

Screws and Bolts

High-Strength Grade 8 Steel Hex Head Screws

Made from Grade 8 steel, these screws can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. They are at least 25% stronger than medium-strength steel screws.

Medium-Strength Grade 5 Steel Hex Head Screws

Twice as strong as low-strength steel screws, these screws are suitable for fastening most machinery and equipment.

18-8 Stainless Steel Hex Head Screws

Use these general purpose 18-8 stainless steel screws for a variety of fastening applications. They have good chemical resistance.

18-8 Stainless Steel Button Head Hex Drive Screws

18-8 stainless steel button head screws have good chemical resistance and may be mildly magnetic.

Brass Decorative Round Head Slotted Screws

Made from brass, these screws are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.

18-8 Stainless Steel High-Profile
Narrow Fillister Head Slotted Screws

These screws have good chemical resistance.

18-8 Stainless Steel Button Head Torx Screws

Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. Torx and Torx-Plus drives have more points of contact than other drives, allowing you to tighten the screw without damaging the recess.

Steel Pan Head Torx Screws

These screws have a Torx or Torx-Plus drive for more points of contact than other drives, allowing you to tighten the screw without damaging the recess.

Stainless Steel Pan Head Torx Screws

Alloy Steel Hex Drive Flat Head Screws

18-8 Stainless Steel Slotted Flat Head Screws

These 18-8 stainless steel screws have good chemical resistance and may be mildly magnetic.

Narrow Knurled-Head Thumb Screws

Use these slim thumb screws in tight spaces.

Slotted Narrow Knurled-Head Thumb Screws

These slotted thumb screws are slim to fit in tight spaces.

Ultra-Fine-Thread Plastic-Head Thumb Screws

Fine threads give you precise control.

Alloy Steel Cup-Point Set Screws

Made from alloy steel, these inch size set screws have a thin edge that digs into hard surfaces for a secure hold.

Ultra-Fine-Thread Ball-Point Set Screws

Fine threads give you precise control.

Alloy Steel Hollow-Lock Set Screws

Also known as jam set screws, these lock other screws in place, hold pins, and adjust spring tension. A black-oxide finish provides corrosion resistance in dry environments.

Threaded Rods

Medium-Strength Steel Threaded Rods—Grade B7

Grade B7, these threaded rods have a tensile strength about one and a half times stronger than low-strength steel rods. They meet the pressure and temperature requirements of ASTM A193 and are often used to secure pressure tanks, valves, and flanges.

Left-Hand Threaded Medium-Strength
Steel Threaded Rods—Grade B7

Tighten these threaded rods by turning them to the left; once fastened, they resist loosening from counterclockwise motion. Made from Grade B7 steel, their tensile strength is one and a half times higher than low-strength steel rods.

High-Strength Steel Threaded Rods

Comparable to Grade 8 steel, these threaded rods have a tensile strength of 150,000 psi, making them about 25% stronger than medium-strength steel rods.

Low-Strength Steel Threaded Rods

About half the strength of medium-strength steel threaded rods, use these for light duty hanging, mounting, and fastening.

18-8 Stainless Steel Threaded Rods

18-8 stainless steel threaded rods have good chemical resistance.

18-8 Stainless Steel Threaded Rods—Grade B8

Grade B8 threaded rods meet the pressure and temperature requirements of ASTM A193 and are often used to secure pressure tanks, valves, and flanges. They have good chemical resistance.