System of Measurement
Length
Length
3/32"
1/8"
3/16"
1/4"
9/32"
5/16"
3/8"
7/16"
1/2"
17/32"
9/16"
5/8"
21/32"
3/4"
25/32"
53/64"
27/32"
7/8"
1"
1 1/32"
1 5/64"
1 3/32"
1 1/8"
1 1/4"
1 9/32"
1 21/64"
1 11/32"
1 3/8"
1 1/2"
1 17/32"
1 37/64"
1 19/32"
1 5/8"
1 3/4"
1 53/64"
1 27/32"
1 7/8"
2"
2 1/32"
2 5/64"
2 3/32"
2 1/4"
2 3/8"
2 1/2"
2 37/64"
2 19/32"
2 5/8"
2 3/4"
3"
3 5/64"
3 3/32"
3 1/4"
3 1/2"
3 19/32"
3 3/4"
4"
4 3/32"
4 1/4"
4 3/8"
4 1/2"
4 3/4"
4 7/8"
5"
5 1/4"
5 1/2"
5 3/4"
6"
6 1/4"
6 1/2"
7"
7 1/2"
8"
8 1/2"
9"
9 1/2"
10"
10 1/2"
11"
11 1/2"
12"
12 1/2"
13"
13 1/2"
14"
14 1/2"
15"
16"
18"
20"
6 mm
8 mm
10 mm
12 mm
14 mm
15 mm
16 mm
18 mm
20 mm
22 mm
25 mm
28 mm
30 mm
35 mm
40 mm
45 mm
50 mm
55 mm
60 mm
65 mm
70 mm
75 mm
80 mm
85 mm
90 mm
95 mm
100 mm
105 mm
110 mm
115 mm
120 mm
125 mm
130 mm
135 mm
140 mm
145 mm
150 mm
155 mm
160 mm
165 mm
170 mm
175 mm
180 mm
185 mm
190 mm
195 mm
200 mm
205 mm
210 mm
215 mm
220 mm
230 mm
240 mm
260 mm
280 mm
300 mm
35 ft.
91 ft.
Thread Direction
Product Categories Screws and Bolts / Hex Head Screws

Hex Head Screws

8946 Products
High-Strength Grade 8Steel Hex Head Screws
High-Strength Grade 8Steel 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.
High-Strength Metric Class10.9 Steel Hex Head Screws
High-Strength Metric Class10.9 Steel Hex Head Screws
Choose these metric screws for high-strength fastening. Often used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems, these screws are at least 25% stronger than medium-strength steel screws.
High-Strength Steel Hex HeadScrews with Material Certification
High-Strength Steel Hex HeadScrews with Material Certification
These screws come with a traceable lot number and a physical and chemical test report. Use them for high-strength fastening.
High-Strength Steel Hex HeadScrews with Phillips Drive
High-Strength Steel Hex HeadScrews with Phillips Drive
When clearance for a wrench is limited, these screws have a Phillips drive so you can install them with a screwdriver. They are used for high-strength fastening.
Mil. Spec. High-StrengthSteel Hex Head Screws
Mil. Spec. High-StrengthSteel Hex Head Screws
Choose these screws for their adherence to strict military standards for material and construction. Their high tensile strength means they can be used in demanding, high-stress applications.
Left-Hand Threaded High-StrengthSteel Hex Head Screws
Left-Hand Threaded High-StrengthSteel Hex Head Screws
Tighten these screws by turning them to the left; once fastened, they prevent counterclockwise-moving parts from loosening. For use in high-strength fastening applications.
Medium-Strength Grade5 Steel Hex Head Screws
Medium-Strength Grade5 Steel Hex Head Screws
Twice as strong as low-strength steel screws, these screws are suitable for fastening most machinery and equipment.
Medium-Strength Metric Class8.8 Steel Hex Head Screws
Medium-Strength Metric Class8.8 Steel Hex Head Screws
Choose these metric screws for fastening most machinery and equipment. They are twice as strong as low-strength steel screws.
Mil. Spec. Medium-StrengthSteel Hex Head Screws
Mil. Spec. Medium-StrengthSteel Hex Head Screws
Choose these screws for their adherence to strict military standards for material and construction. Use them to fasten most machinery and equipment.
Army-Navy Medium-StrengthSteel Hex Head Screws
Army-Navy Medium-StrengthSteel Hex Head Screws
These screws are made to stringent Army-Navy specifications that ensure performance and reliability. They're comparable in strength to Grade 5 steel screws.
JIS Medium-StrengthSteel Hex Head Screws
JIS Medium-StrengthSteel Hex Head Screws
These screws are made to Japanese Industrial Standards. They are suitable for fastening most machinery and equipment.
Left-Hand Threaded Medium-StrengthMetric Class 8.8 Steel Hex Head Screws
Left-Hand Threaded Medium-StrengthMetric Class 8.8 Steel Hex Head Screws
These metric screws help prevent counterclockwise-moving parts from loosening. Use them for medium-strength fastening.
Left-Hand Threaded Medium-StrengthGrade 5 Steel Hex Head Screws
Left-Hand Threaded Medium-StrengthGrade 5 Steel Hex Head Screws
Tighten these screws by turning them to the left; once fastened, they prevent counterclockwise-moving parts from loosening. For use in medium-strength fastening applications.
Low-Strength Steel Hex Head Screws
Low-Strength Steel Hex Head Screws
About half as strong as medium-strength steel screws, these screws can be used for light duty fastening applications, such as securing access panels.
Extreme-Strength Grade9 Steel Hex Head Screws
Extreme-Strength Grade9 Steel Hex Head Screws
These screws are the strongest we offer. They are about 20% stronger than high-strength steel screws and are often used in heavy duty applications such as stamping and earth-moving equipment.
Extreme-Strength Metric Class12.9 Steel Hex Head Screws
Extreme-Strength Metric Class12.9 Steel Hex Head Screws
Choose these metric screws for heavy duty stamping applications as well as earth-moving machinery such as bulldozers and excavators. These screws are 10% stronger than our high-strength metric steel screws.
18-8 Stainless Steel Hex Head Screws
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.
Mil. Spec. 18-8 StainlessSteel Hex Head Screws
Mil. Spec. 18-8 StainlessSteel Hex Head Screws
Choose these screws for their adherence to strict military standards for material and construction. Screws are 18-8 stainless steel for good chemical resistance.
Left-Hand Threaded 18-8Stainless Steel Hex Head Screws
Left-Hand Threaded 18-8Stainless Steel Hex Head Screws
Tighten these screws by turning them to the left; once fastened, they prevent counterclockwise-moving parts from loosening. Made from 18-8 stainless steel, these screws have good chemical resistance.
Super-Corrosion-Resistant 316Stainless Steel Hex Head Screws
Super-Corrosion-Resistant 316Stainless Steel Hex Head Screws
More corrosion resistant than 18-8 stainless steel screws, these 316 stainless steel screws have excellent resistance to chemicals and salt water.
Super-Corrosion-Resistant High-StrengthBumax 88 Hex Head Screws
Super-Corrosion-Resistant High-StrengthBumax 88 Hex Head Screws
Choose these screws for their excellent corrosion resistance—comparable to 316 stainless steel—and the strength of steel. Use them for high-strength fastening in chemical and marine applications.
High-Strength 17-4 PH StainlessSteel Hex Head Screws
High-Strength 17-4 PH StainlessSteel Hex Head Screws
With the strength of steel and the corrosion resistance of 18-8 stainless steel, these 17-4 PH stainless steel screws are suitable for high-strength fastening in corrosive environments.
Stainless Steel Hex Screwand Nut Kits for Pipe Flanges
Stainless Steel Hex Screwand Nut Kits for Pipe Flanges
Use these kits to connect standard-size stainless steel pipe flanges for ANSI Class 150 or 300.
Plastic Hex Head Screws
Plastic Hex Head Screws
Plastic screws are chemical and oil resistant, nonconductive, and lightweight.
Brass Hex Head Screws
Brass Hex Head Screws
Brass screws are electrically conductive, nonmagnetic, and have good corrosion resistance.
Aluminum Hex Head Screws
Aluminum Hex Head Screws
Aluminum screws are one-third the weight of steel and have good corrosion resistance.
Titanium Hex Head Screws
Titanium Hex Head Screws
Our most corrosion-resistant metal screws, titanium screws withstand salt water, acids, and chemicals. They have a high strength-to-weight ratio—stronger than medium-strength steel screws and about 40% lighter.
Bronze Hex Head Screws
Bronze Hex Head Screws
Bronze screws are 30% stronger than brass screws and provide more corrosion resistance to salt water, gases, and sewage. They are nonmagnetic and electrically conductive.
Ceramic Hex Head Screws
Ceramic Hex Head Screws
Ceramic screws won't melt, rust, seize, or become brittle—even at extreme temperatures. They are nonconductive and highly resistant to corrosive gases.
Fiberglass Hex Head Screws
Fiberglass Hex Head Screws
Fiberglass screws are stronger than plastic screws, chemical and oil resistant, nonconductive, and lightweight.
Nickel Alloy Hex Head Screws
Nickel Alloy Hex Head Screws
More corrosion resistant than 316 stainless steel, nickel alloy screws have excellent resistance to salt water and some acids.
Medium-Strength Steel Heavy HexHead Screws for Structural Applications
Medium-Strength Steel Heavy HexHead Screws for Structural Applications
The most common heavy hex head screw, these steel screws meet ASTM A325 regulations for structural joints, such as mating I-beams and scaffolding.
Metric High-Strength Steel Heavy HexHead Screws for Structural Applications
Metric High-Strength Steel Heavy HexHead Screws for Structural Applications
Designed for construction and exterior building applications, these metric screws are often used to join I-beams and scaffolding. Their partial threading leaves an unthreaded portion that is strong enough to stand up to the sideways forces of joints.
High-Strength Steel Heavy Hex HeadScrews for Structural Applications
High-Strength Steel Heavy Hex HeadScrews for Structural Applications
50% stronger than our medium-strength steel heavy hex head screws, these screws meet ASTM A490 specifications for structural applications. Use them in joints that require more tensile strength than ASTM A325 screws.
18-8 Stainless Steel Heavy Hex HeadScrews for High-Pressure Applications
18-8 Stainless Steel Heavy Hex HeadScrews for High-Pressure Applications
These Grade B8 screws are made from 18-8 stainless steel and have good chemical resistance. Also known as pressure bolts, they meet the high-pressure and high-temperature regulations of ASTM A193 and are used to secure pressure tanks, valves, and flanges.
Super-Corrosion-Resistant 316Stainless Steel Heavy Hex Head Screws for High-Pressure Applications
Super-Corrosion-Resistant 316Stainless Steel Heavy Hex Head Screws for High-Pressure Applications
Made from 316 stainless steel, these Grade B8M screws are more corrosion resistant than 18-8 stainless steel screws and have excellent resistance to chemicals and salt water. Screws meet ASTM A193 regulations, so they can be used in high-pressure and high-temperature applications. Also known as pressure bolts.
Steel Heavy Hex Head Screwsfor High-Pressure Applications
Steel Heavy Hex Head Screwsfor High-Pressure Applications
These Grade B7 steel screws are nearly twice as strong as our stainless steel screws for high-pressure applications. Also known as pressure bolts, they meet the high-pressure, high-temperature regulations of ASTM A193 and are used to secure pressure tanks, valves, and flanges.
High-Strength Grade 8 SteelFlanged Hex Head Screws
High-Strength Grade 8 SteelFlanged 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. The flange distributes pressure over the surface, eliminating the need for a washer.
High-Strength Metric Class 10.9Steel Flanged Hex Head Screws
High-Strength Metric Class 10.9Steel Flanged Hex Head Screws
These metric screws are at least 25% stronger than medium-strength steel screws. Use them in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. The flange distributes pressure where the screw meets the surface, so there's no need for a washer.
JIS High-Strength SteelFlanged Hex Head Screws
JIS High-Strength SteelFlanged Hex Head Screws
Made to Japanese Industrial Standards, these Class 10.9 steel 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. The flange eliminates the need for a washer.
Medium-Strength Metric Class 8.8Steel Flanged Hex Head Screws
Medium-Strength Metric Class 8.8Steel Flanged Hex Head Screws
Choose these metric screws for fastening most machinery and equipment. With a flange distributing pressure where the screw meets the surface, there is no need for a separate washer.
Medium-Strength Grade 5 SteelFlanged Hex Head Screws
Medium-Strength Grade 5 SteelFlanged Hex Head Screws
Made from Grade 5 steel, these screws are suitable for fastening most machinery and equipment. The flange distributes pressure where the screw meets the surface, eliminating the need for a washer.
Extreme-Strength SteelFlanged Hex Head Screws
Extreme-Strength SteelFlanged Hex Head Screws
Comparable in strength to Grade 9 screws, these are about 20% stronger than high-strength steel screws and often used in heavy duty applications, such as stamping and earth-moving equipment. The flange eliminates the need for a washer.
Stainless Steel Flanged Hex Head Screws
Stainless Steel Flanged Hex Head Screws
Made from 18-8 stainless steel, these screws have good chemical resistance. A flange under the head distributes pressure over the surface, eliminating the need for a washer.
Stainless Steel Flanged HexHead Screws with Slotted Drive
Stainless Steel Flanged HexHead Screws with Slotted Drive
Install these screws with a wrench or a screwdriver. Made from stainless steel, they have good corrosion resistance. A flange under the head means a separate washer is not necessary.
Extreme-Strength StainlessSteel Flanged Hex Head Screws
Extreme-Strength StainlessSteel Flanged Hex Head Screws
For strength comparable to that of Grade 9 steel and the corrosion resistance of stainless steel, choose these screws. They are work-hardened for extreme strength. The flange eliminates the need for a separate washer.
Fiberglass Flanged Hex Head Screws
Fiberglass Flanged Hex Head Screws
These screws are chemical and oil resistant, nonconductive, and lightweight. The flange eliminates the need for a washer, distributing pressure where the screw meets the surface.
Medium-Strength Grade 5 SteelSerrated-Flange Hex Head Screws
Medium-Strength Grade 5 SteelSerrated-Flange Hex Head Screws
Made from Grade 5 steel, these screws are suitable for fastening most machinery and equipment. Serrations under the flange provide mild vibration resistance.
Medium-Strength Metric Class 8.8 SteelSerrated-Flange Hex Head Screws
Medium-Strength Metric Class 8.8 SteelSerrated-Flange Hex Head Screws
These metric screws are suitable for fastening most machinery and equipment. They have a serrated flange that helps prevent loosening from vibration.
High-Strength Metric SteelSerrated-Flange Hex Head Screws
High-Strength Metric SteelSerrated-Flange Hex Head Screws
About 20% stronger than medium-strength steel screws, these Grade 8 steel screws can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. Serrations under the flange provide mild vibration resistance.
High-Strength Grade 8 SteelSerrated-Flange Hex Head Screws
High-Strength Grade 8 SteelSerrated-Flange Hex Head Screws
Choose these metric screws for high-stress applications, such as valves, pumps, motors, and automotive suspension systems. They are about 10% stronger than medium-strength steel screws. Their serrated flange helps to resist vibration.
18-8 Stainless SteelSerrated-Flange Hex Head Screws
18-8 Stainless SteelSerrated-Flange Hex Head Screws
Made from 18-8 stainless steel, these screws have good chemical resistance. Their flange is serrated to help prevent loosening from vibration.
Super-Corrosion-Resistant 316 StainlessSteel Serrated-Flange Hex Head Screws
Super-Corrosion-Resistant 316 StainlessSteel Serrated-Flange Hex Head Screws
More corrosion resistant than 18-8 stainless steel screws, these 316 stainless steel screws have excellent resistance to chemicals and salt water. A serrated flange provides mild vibration resistance.
Extra-Wide Serrated-FlangeHex Head Screws
Extra-Wide Serrated-FlangeHex Head Screws
These screws have a flange that's at least 10% larger than a standard flange for more gripping power. Serrations under the head provide mild vibration resistance.
Steel Wire-Lockable Hex Head Screws
Steel Wire-Lockable Hex Head Screws
These Grade 5 steel screws are over 70% stronger than our stainless steel wire-lockable hex head screws. Wire these screws together through the hole in the head to get more vibration resistance than any other screw.
Stainless Steel Wire-LockableHex Head Screws
Stainless Steel Wire-LockableHex Head Screws
Made from 18-8 stainless steel, these screws have the best chemical and corrosion resistance of our wire-lockable screws. Wire these screws together for more vibration resistance than other types of hex head screws.
Cotter Pin-Lockable Hex Head Screws
Cotter Pin-Lockable Hex Head Screws
Place a cotter pin through the hole in the shank to keep a nut from loosening. These screws have a stronger hold than screws with thread lockers or lock washers.
High-Strength Grade 8 SteelThread-Locking Hex Head Screws
High-Strength Grade 8 SteelThread-Locking 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 more than twice as strong as our stainless steel thread-locking screws. The thread locker helps resist loosening from vibration.
Medium-Strength Metric Class 8.8 SteelThread-Locking Hex Head Screws
Medium-Strength Metric Class 8.8 SteelThread-Locking Hex Head Screws
These Class 8.8 steel screws are suitable for fastening most machinery and equipment. They are over 50% stronger than stainless steel thread-locking screws. For vibration resistance, they have a thread locker bonded to the threads.
Stainless Steel Thread-LockingHex Head Screws
Stainless Steel Thread-LockingHex Head Screws
Made from 18-8 stainless steel, these screws have good chemical resistance. They have a thread locker to prevent loosening from vibration.
Hex Head Screws with Lock Washer
Hex Head Screws with Lock Washer
Also known as Sems screws, these screws have a permanently attached but freely rotating tooth lock washer that bites into the mating surface for vibration resistance.
Hex Head Screws with Flat Washer
Hex Head Screws with Flat Washer
A freely rotating but permanently attached washer distributes pressure over a wider area than a flange, preventing damage to your material's surface.
Sealing Hex Head Screws
Sealing Hex Head Screws
An O-ring under the head prevents leaks and seals out contaminants.
Sanitary Hex Head Screws
Sanitary Hex Head Screws
Bolt down equipment in food processing or sanitary areas while sealing out contaminants.
Vented Hex Head Screws
Vented Hex Head Screws
Drilled through the head and shaft, these screws vent fluid and gases trapped below the screw, making them good for vacuum applications.
Tension-Indicating Hex Head Screws
Tension-Indicating Hex Head Screws
An indicator dot changes from red to black when the screw is properly tightened. If it comes loose, the dot changes back to red.
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