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System of Measurement

Inch
Metric

Material

Steel is an alloy made up of iron with typically a few tenths of a percent of carbon to improve its strength and fracture resistance compared to other forms of iron.
Alloy Steel has iron, carbon, and other elements added to it during smelting. Alloy steel is stronger and more corrosion resistant than plain steel
Stainless Steel is a group of ferrous alloys that contains a minimum of approximately 11% chromium, a composition that prevents the iron from rusting and also provides heat-resistant properties.
Brass is an electrically conductive material that is corrosion resistant and not megnetic
Bronze is stronger than brass; bronze fasteners are corrosion resistant to saltwater, gases and sewage; they are nonmagnetic and electrically conductive.
Aluminum is one-third the weight of steel, aluminum is corrosion resistant and reflects light
Nylon is a lightweight, light-duty synthetic plastic that is chemical and oil resistant

Steel
Alloy Steel
Stainless Steel
Brass
Bronze
Aluminum
Nylon

Material Grade/Class

Describes the grade or classification of the bolt

Grade 2 is about half as strong as medium-strength grades or classes and is used for light-duty fastening.
A307A is heat-treated. medium-strength carbon steel.
Grade 5 is suitable for fastening most machinery and equipment; this grade is marked with three radial lines
Grade 8 is used in high-stress applications, is 25% stronger than medium-strength steel screws, and is marked with six radial lines.
Grade 9 is the heaviest-duty, strongest steel marked with nine radial lines.
A325 Type 1 is strong, heavy-duty fastening material containing two types of quenched and tempered steel for structural steel-to-steel connections.
A490 Type 1 is similar to A325 but is made from alloy steel creating a higher strength fastener.
Class 4.6 is low or medium carbon steel used in light-duty automotive applications.
Class 8.8 is medium-strength steel with high ductility and workability, and is used on most types of equipment
Class 10.9 is stronger than medium-strength steel; this grade is used for high-stress applications or materials.
18-8 is magnetic with natural chemical resistance; this grade is also known as metric A2
316 is more corrosion resistant than 18-8 and is chemical and saltwater resistant
A2 is metric stainless steel akin to 18-8, and is magnetic with natural chemical resistance.
A4 is more corrosion resistant than A2 stainless steel, and is chemical and saltwater resistant
A307B is medium-strength heat-treated carbon steel
A394 Type 0 is used for steel tower bolts, is corrosion resistant and chemical resistant, and is made to withstand environmental pressures.
A394 Type 1 is used for steel transmission tower bolts, is corrosion resistant and chemical resistant, and is made to withstand environment pressures
Grade E9 is stronger than Grade 8 fasteners, and is made to withstand rough conditions. Fasteners made of this material may be used more than once.
Not Graded is a designation given to many bolts and screws, especially smaller sizes, that are not graded,. This means their strength is not specified.

Grade 2
A307A
Grade 5
Grade 8
Grade 9
A325 Type 1
A490 Type 1
Class 4.6
Class 8.8
Class 10.9
18-8
316
A2
A4
A307B
A394 Type 0
A394 Type 1
Grade E9
Not Graded

Finish

Describes what type of finish is on the bolt

Plain does not have a finish or treatment applied
Black Oxide is corrosion resistant in dry environments
Phosphate and Oil is a zinc or manganese coating used with a rust-inhibiting oil dip. This low-cost coating serves as a rust inhibitor and a lubricant. The addition of oil offers some corrosion protection, added lubricity, and can prevent galling.
Zinc Plated is corrosion resistant in wet environments
Blue Phosphate is a blue-dyed zinc plate finish designed to easily identify metric-sized items.
Zinc Yellow is corrosion resistant in wet environments and gives screws a golden sheen
Hot Dipped Galvanized is a thick coating that is more corrosion resistant than using zinc alone. Screws dipped in this finish require matching nuts
Chrome Plated is a highly corrosion-resistant finish that extends wear and resilience. Chrome plating provides protection in environments where fasteners are exposed to high friction and wet conditions.
Armor Coat is a proprietary coating that imparts high corrosion resistance in harsh or saltwater environments. It adds strength and chemical resistance to fasteners.
NL-19 is a proprietary finish that brightens stainless steel screws and increases strength and corrosion resistance without changing the size of the screw

Plain
Black Oxide
Phosphate and Oil
Zinc Plated
Blue Phosphate
Zinc Yellow
Hot Dipped Galvanized
Chrome Plated
Armor Coat
NL-19

Thread Size

Imperial or inch thread sizes of bolts are specified by diameter and threads per inch. Diameter is also known as screw size. For those with a diameter smaller than 1/4", screw size is indicated by a number (e.g., #10 or No. 10). Metric thread sizes are specified by diameter and pitch, which is the space between threads. For the size M6 × 1 mm, the pitch is coarse; while the size M6 × 0.75 mm has a fine pitch.

#6-32
#8-32
#10-24
1/4"-20
1/4"-28
5/16"-18
5/16"-24
3/8"-16
3/8"-24
7/16"-14
7/16"-20
1/2"-13
1/2"-20
9/16"-12
9/16"-18
5/8"-11
5/8"-18
3/4"-10
3/4"-16
7/8"-9
7/8"-14
1"-8
1"-14
1-1/8"-7
1-1/8"-12
1-1/4"-7
1-1/4"-12
1-1/2"-6
1-1/2"-12
1-1/2"-18
1-3/4"-5
2"-4-1/2
2"-11
2-1/2"-4
1-1/8"-7
1-1/4"-7
1-1/2"-6
M3-0.50
M4-0.70
M5-0.80
M6-1.00
M7-1.00
M8-1.00
M8-1.25
M10-1.00
M10-1.25
M10-1.50
M12-1.25
M12-1.50
M12-1.75
M14-1.50
M14-2.00
M16-1.50
M16-2.00
M18-1.50
M18-2.50
M20-1.50
M20-2.50
M22-2.50
M24-1.50
M24-2.00
M24-3.00
M27-3.00
M30-3.50
M33-3.50
M36-4.00
M39-4.00
M42-4.50
M45-4.50
M48-5.00
M52-5.00
M56-5.50
M60-5.50
M64-6.00
M72-6.00
Unthreaded
5/8"- 11

Fastener Length

3/8 in
1/2 in
5/8 in
3/4 in
7/8 in
15/16 in
1 in
1-1/16 in
1-1/8 in
1-3/16 in
1-1/4 in
1-3/8 in
1-1/2 in
1-19/32 in
1-5/8 in
1-3/4 in
1-7/8 in
1-15/16 in
2 in
2-1/16 in
2-1/8 in
2-7/32 in
2-1/4 in
2-5/16 in
2-3/8 in
2-25/64 in
2-7/16 in
2-15/32 in
2-1/2 in
2-17/32 in
2-19/32 in
2-5/8 in
2-21/32 in
2-3/4 in
2-13/16 in
2-27/32 in
2-63/64 in
3 in
3-1/32 in
3-1/16 in
3-3/32 in
3-1/8 in
3-3/16 in
3-13/64 in
3-7/32 in
3-15/64 in
3-1/4 in
3-9/32 in
3-5/16 in
3-3/8 in
3-13/32 in
3-31/64 in
3-1/2 in
3-17/32 in
3-9/16 in
3-37/64 in
3-5/8 in
3-11/16 in
3-3/4 in
3-49/64 in
3-25/32 in
3-13/16 in
3-7/8 in
3-57/64 in
3-15/16 in
4 in
4-1/64 in
4-1/32 in
4-1/16 in
4-1/8 in
4-3/16 in
4-13/64 in
4-1/4 in
4-19/64 in
4-5/16 in
4-11/32 in
4-3/8 in
4-31/64 in
4-1/2 in
4-17/32 in
4-9/16 in
4-19/32 in
4-11/16 in
4-3/4 in
4-25/32 in
4-13/16 in
4-27/32 in
4-7/8 in
4-57/64 in
4-15/16 in
5 in
5-1/32 in
5-1/16 in
5-3/32 in
5-1/8 in
5-3/16 in
5-7/32 in
5-15/64 in
5-1/4 in
5-17/64 in
5-5/16 in
5-21/64 in
5-3/8 in
5-7/16 in
5-31/64 in
5-1/2 in
5-17/32 in
5-9/16 in
5-37/64 in
5-11/16 in
5-45/64 in
5-3/4 in
5-49/64 in
5-25/32 in
5-51/64 in
5-13/16 in
5-7/8 in
5-57/64 in
5-15/16 in
6 in
6-1/64 in
6-1/32 in
6-1/16 in
6-3/32 in
6-13/64 in
6-1/4 in
6-17/64 in
6-9/32 in
6-19/64 in
6-5/16 in
6-3/8 in
6-25/64 in
6-7/16 in
6-1/2 in
6-33/64 in
6-17/32 in
6-37/64 in
6-19/32 in
6-5/8 in
6-11/16 in
6-23/32 in
6-49/64 in
6-51/64 in
6-7/8 in
6-57/64 in
7 in
7-1/32 in
7-1/16 in
7-3/16 in
7-13/64 in
7-9/32 in
7-19/64 in
7-5/16 in
7-3/8 in
7-25/64 in
7-1/2 in
7-33/64 in
7-17/32 in
7-9/16 in
7-5/8 in
7-45/64 in
7-3/4 in
7-25/32 in
7-51/64 in
7-13/16 in
7-7/8 in
8 in
8-1/64 in
8-1/32 in
8-1/4 in
8-17/64 in
8-9/32 in
8-5/16 in
8-29/64 in
8-1/2 in
8-33/64 in
8-9/16 in
8-37/64 in
8-11/16 in
8-3/4 in
8-51/64 in
8-13/16 in
8-15/16 in
8-61/64 in
9 in
9-1/16 in
9-7/32 in
9-5/16 in
9-3/8 in
9-25/64 in
9-1/2 in
9-33/64 in
9-17/32 in
9-9/16 in
9-47/64 in
9-13/16 in
9-63/64 in
10 in
10-1/64 in
10-1/16 in
10-1/8 in
10-17/64 in
10-13/32 in
10-27/64 in
10-31/64 in
10-1/2 in
10-9/16 in
10-47/64 in
10-51/64 in
10-13/16 in
11 in
11-1/8 in
11-3/16 in
11-13/64 in
11-9/32 in
11-3/8 in
11-29/64 in
11-1/2 in
11-33/64 in
11-17/32 in
11-51/64 in
11-13/16 in
11-7/8 in
11-63/64 in
12 in
12-1/64 in
12-3/64 in
12-1/16 in
12-15/64 in
12-5/16 in
12-13/32 in
12-1/2 in
12-51/64 in
12-13/16 in
13 in
13-3/16 in
13-9/32 in
13-3/8 in
13-33/64 in
13-5/8 in
13-47/64 in
13-63/64 in
14 in
14-1/64 in
14-1/32 in
14-1/16 in
14-5/16 in
14-1/2 in
14-19/32 in
14-51/64 in
14-13/16 in
14-7/8 in
14-63/64 in
15 in
15-1/8 in
15-3/8 in
15-25/64 in
15-13/32 in
15-33/64 in
15-17/32 in
15-63/64 in
16 in
16-1/16 in
16-13/32 in
16-27/64 in
16-47/64 in
17-3/16 in
17-13/64 in
17-9/32 in
17-1/2 in
17-51/64 in
18 in
18-3/64 in
18-1/16 in
18-3/8 in
18-25/32 in
18-63/64 in
20-1/2 in
20-51/64 in
21 in
21-3/8 in
21-33/64 in
21-63/64 in
22-13/32 in
23-3/16 in
26-1/2 in
26-51/64 in
27 in
27-3/8 in
27-33/64 in
27-63/64 in
28-1/16 in
28-13/32 in
28-47/64 in
29-3/16 in
29-9/32 in
30-3/64 in
6 mm
8 mm
10 mm
12 mm
14 mm
16 mm
18 mm
20 mm
22 mm
25 mm
30 mm
35 mm
40 mm
45 mm
49 mm
50 mm
55 mm
56.4 mm
60 mm
62 mm
64.3 mm
65 mm
70 mm
74.5 mm
75 mm
75.4 mm
78.5 mm
80 mm
85 mm
86.6 mm
88.1 mm
89 mm
90 mm
95 mm
96 mm
96.8 mm
100 mm
102 mm
105 mm
106.4 mm
110 mm
115 mm
115.8 mm
115.9 mm
120 mm
125 mm
125.4 mm
126 mm
128.5 mm
130 mm
139.7 mm
140 mm
146.1 mm
150 mm
153 mm
157.2 mm
160 mm
163.6 mm
170 mm
174.6 mm
180 mm
182 mm
190 mm
196.9 mm
200 mm
210 mm
214.3 mm
220 mm
230 mm
236 mm
240 mm
246.9 mm
250 mm
260 mm
280 mm
282.6 mm
298 mm
300 mm
310.4 mm
320 mm
340 mm
360 mm
380 mm
391.2 mm
400 mm
420 mm
440 mm
460 mm
480 mm
500 mm

Thread Style

Describes the style of the bolt thread

Fully Threaded has threads that run the entire length of the screw body.
Partially Threaded has an unthreaded area just beneath the head and then has partial threading along the rest of the fastener body. The part that is not threaded is known as the grip length.

Thread Type

Coarse has fewer threads per inch than fine threads and requires fewer turns to tighten fully. Coarse-threaded fasteners are more common than other types and are less likely to cross-strip or jam.
Fine has threads that are more closely spaced making them easier to tap than coarse threads. Fine-threaded fasteners have reduced tapping torque and are less likely to loosen or break when threaded into moving or vibrating materials.
Extra Fine has threads that are more closely spaced than fine threads. Extra fine threaded fasteners are used in areas where precise, small adjustments must be made as the fastener is tightened.

Coarse
Fine
Extra Fine

Price

Min

Only digits are allowed. Maximum amount of digits: 6.

to

Max

Only digits are allowed. Maximum amount of digits: 6.

Country of Origin: US

22,673 products

Bolts secure materials together by applying pressure that tightens the head of the bolt to the nut. They fit with corresponding tapped holes and nuts to create bolted joints. Their externally threaded design makes them easy to tighten with wrenches or pliers. Bolts vary in use depending on their shape, head type and size. The most common types of bolts include hex head, U-bolts, eye bolts, carriage, elevator, plow and flange.

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