Grade 5 Steel Hex Head Screws
Description
Technical Parameters
Product Description
These hex head screws boast of medium-strength grade 5 steel, making them the ideal choice for securing machinery and equipment. Their dimensions adhere to ASME B18.2.1 specifications. Be on the lookout for the tell-tale sign of grade 5 steel screws—the presence of three radial lines etched onto their surface. To determine the overall length, measure from the bottom of the head. With these screws in hand, you can be confident that your equipment will stay in place.

Steel screws come in different types, each with varying levels of corrosion resistance. Black-oxide steel screws are an ideal choice for use in dry environments as they provide some level of protection against corrosion. For wet environments, zinc-plated steel screws are a better option. They have increased resistance to corrosion and can withstand exposure to moisture and water.
If you need screws that can withstand chemical exposure, then black ultra-corrosion-resistant-coated steel screws are the best choice. These screws have been tested and found to resist chemical corrosion and are capable of withstanding up to 1,000 hours of salt spray as per ASTM B117. To get the most out of these screws, it is best to use them alongside black ultra-corrosion-resistant-coated nuts and washers.
By selecting the right screws for the job, you can ensure that your project is durable and long-lasting. Consider the environment in which the screws will be used and select the type that is best suited for that application. Whether it's black-oxide steel, zinc-plated steel, or ultra-corrosion-resistant-coated steel screws, each can provide superior performance in the right conditions.
When selecting screws for mating components, it's important to match the thread spacing correctly. In general, the industry standard is coarse threads. These are a safe choice when you're not sure how many threads per inch you need. However, if you need to prevent loosening from vibration, fine and extra-fine threads are the way to go. These threads are spaced more closely together, and the finer the thread, the better the resistance to vibration. So, choose the right thread spacing for your application to ensure a secure connection.
ASTM A449 or SAE J429 screws are subjected to rigorous testing and material quality requirements to ensure compliance with set specifications. These screws are manufactured to meet the highest standards of quality and reliability. As a result, users of these screws can be confident that they are getting products that are of superior quality and performance. Whether for industrial or commercial use, these screws are ideal for applications where durability and reliability are highly sought after.
Mechanical Properties:
Mechanical Properties | Grade 5 |
Tensile Load | 120000psi |
Yield strength | 92000psi |
Hardness | Rockwell 25-34 |
Elongation in 4D min. | 14% |
Reduction of area min. | 35% |


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