Hex Cap Screws

Hex cap screws are a six-sided fastener with a washer face under the head and a chamfered point. RC Fasteners offers zinc plated cap screws in a variety of grades, including low carbon grade 2, medium carbon grade 5, and alloy steel grade 8, as well as A2 (18-8) and A4 (316) stainless steel. Each variation is available in a range of imperial and metric sizes, including DIN931 partial thread and DIN933 full thread. Our selection also includes certified B1821, MS90727, and MS90728 alloy hex cap screws for the aerospace industry.

RC Fasteners & Components is your #1 source for premium quality hex cap screws. We can have your fasteners special ordered in small or high volumes, with the quickest lead times and most competitive prices in the industry. All orders are available with FREE SHIPPING to anywhere in the continental U.S. Order online or request a quote today. Contact us to find the size, material, or finish best suited to your requirements.

Hex Head Screw Material Options

We offer cap screws in a wide range of materials to suit your specific environmental needs. Options include:
  • Low Carbon Steel Grade 2
  • Medium Carbon Steel Grade 5
  • Alloy Steel Grade 8
  • A2 18-8 Stainless Steel
  • A4 316 Stainless Steel

Socket Head Cap Screw Finishes

Platings and finishes will alter the appearance of the screw and enhance certain properties, namely corrosion resistance. Zinc plated hex head screws possess good rust resistance qualities at a low cost. Yellow zinc provides a higher level of corrosion resistance compared to the standard zinc finish. Can also do black oxide or black zinc, inquire within.
  • Plain Finish
  • Zinc CR+3
  • Zinc Yellow CR+3
  • Zinc Yellow CR+6

Hex Cap Screws Tensile Strength Grades

Fasteners are often classified into different grades based off the amount of force they can withstand before breaking. Our selection of cap screws are categorized in either the U.S. SAE system or the metric class system.
  • U.S. Grade 2: Tensile strength between 60,000 psi and 74,000 psi
  • U.S. Grade 5: Tensile strength between 10-5,000 and 120,000 psi
  • U.S. Grade 8: Most reliable & durable grade with a tensile strength of 150,000 psi
  • Metric Class 8.8: Tensile strength most comparable to U.S. Grade 5 cap screws
  • Metric Class 10.9: Tensile strength most comparable to U.S. Grade 8 cap screws
  • 18-8 Stainless Steel: Used in products that require general atmospheric corrosion resistance, such as chemical and food-processing equipment. Some chemical environments may require special corrosion resistant materials and precautions.
  • 316 Stainless Steel: The molybdenum content gives this type of stainless even greater corrosion resistance than 18-8, as well as superior strength at high temperatures.

Hex Head Cap Screws vs Hex Bolts

While these terms are often used interchangeably, these two products should not be confused with one another. The most basic difference between a cap screw and a hex bolt is the way in which they’re installed. Generally, bolts are tightened using a nut, whereas cap screws are tightened using the head of the bolt.

You will commonly see hex cap screws used in precision applications due to their tight dimensional tolerances. Hex bolts, on the other hand, are used in applications where the fasteners’ mechanical properties outweigh dimensional tolerances, like is often the case in the construction industry.

Find the Wholesale Hex Cap Screws You Need at RC Fasteners & Components

RC Fasteners offers an extensive selection of premium quality hex cap screws, hex tap bolts, hex lag bolts, and more. We offer international fast drop shipping and wholesale, factory-direct pricing on all in-stock fastener products. Request a quote today to receive hex head cap screws in bulk. Call us at (623) 516-1551 to speak to an expert.