About Flat Head Screws
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About Rounded Head Screws
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About Hex Head Screws and Bolts
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18-8 Stainless Steel Pan Head Phillips Screws
18-8 stainless steel pan head screws have good chemical resistance and may be mildly magnetic. Length is measured from under the head. For partially threaded screws thread length may vary from the minimum thread length published to fully threaded.
PTFE-coated stainless steel screws won’t stick or bind as you thread them into a hole.
| Lg. | Threading | Head Dia. | Head Ht. | Drive Size | Tensile Strength, psi  | Specifications Met | Pkg. Qty. | Pkg. | |
PTFE-Coated 18-8 Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
6-32 | |||||||||
| 1/4" | Fully Threaded | 0.270" | 0.097" | No. 2 | 70,000 | ASME B18.6.3 | 50 | 000000000 | 000000 |
| 3/8" | Fully Threaded | 0.270" | 0.097" | No. 2 | 70,000 | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 1/2" | Fully Threaded | 0.270" | 0.097" | No. 2 | 70,000 | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 3/4" | Fully Threaded | 0.270" | 0.097" | No. 2 | 70,000 | ASME B18.6.3 | 50 | 000000000 | 00000 |
8-32 | |||||||||
| 1/4" | Fully Threaded | 0.322" | 0.115" | No. 2 | 70,000 | ASME B18.6.3 | 50 | 000000000 | 0000 |
| 3/8" | Fully Threaded | 0.322" | 0.115" | No. 2 | 70,000 | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 1/2" | Fully Threaded | 0.322" | 0.115" | No. 2 | 70,000 | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 3/4" | Fully Threaded | 0.322" | 0.115" | No. 2 | 70,000 | ASME B18.6.3 | 25 | 000000000 | 00000 |
10-32 | |||||||||
| 3/8" | Fully Threaded | 0.373" | 0.133" | No. 2 | 70,000 | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 1/2" | Fully Threaded | 0.373" | 0.133" | No. 2 | 70,000 | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 3/4" | Fully Threaded | 0.373" | 0.133" | No. 2 | 70,000 | ASME B18.6.3 | 25 | 000000000 | 00000 |
| 1" | Fully Threaded | 0.373" | 0.133" | No. 2 | 70,000 | ASME B18.6.3 | 25 | 000000000 | 00000 |
1/4"-20 | |||||||||
| 1/2" | Fully Threaded | 0.492" | 0.175" | No. 3 | 70,000 | ASME B18.6.3 | 25 | 000000000 | 00000 |
| 3/4" | Fully Threaded | 0.492" | 0.175" | No. 3 | 70,000 | ASME B18.6.3 | 10 | 000000000 | 0000 |
| 1" | Fully Threaded | 0.492" | 0.175" | No. 3 | 70,000 | ASME B18.6.3 | 10 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | 0.492" | 0.175" | No. 3 | 70,000 | ASME B18.6.3 | 10 | 000000000 | 00000 |
18-8 Stainless Steel Phillips Flat Head Screws
These screws have good chemical resistance and may be mildly magnetic. They’re angled under the head to sit flush within countersunk holes. Length is measured from the top of the head.
Screws with an undercut profile have a shallow head for use in thin materials.
PTFE-coated stainless steel screws won’t stick or bind as you thread them into a hole.
| Lg. | Threading | Flat Head Profile | Head Dia. | Head Ht. | Drive Size | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
PTFE Coated 18-8 Stainless Steel—82° Countersink Angle | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
6-32 | ||||||||||
| 1/4" | Fully Threaded | Standard | 0.262" | 0.083" | No. 2 | 80,000 | ASME B18.6.3 | 50 | 000000000 | 000000 |
| 3/8" | Fully Threaded | Standard | 0.262" | 0.083" | No. 2 | 80,000 | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 1/2" | Fully Threaded | Standard | 0.262" | 0.083" | No. 2 | 80,000 | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 3/4" | Fully Threaded | Standard | 0.262" | 0.083" | No. 2 | 80,000 | ASME B18.6.3 | 50 | 000000000 | 00000 |
8-32 | ||||||||||
| 1/4" | Fully Threaded | Undercut | 0.312" | 0.1" | No. 2 | 80,000 | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 3/8" | Fully Threaded | Standard | 0.312" | 0.1" | No. 2 | 80,000 | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 1/2" | Fully Threaded | Standard | 0.312" | 0.1" | No. 2 | 80,000 | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 3/4" | Fully Threaded | Standard | 0.312" | 0.1" | No. 2 | 80,000 | ASME B18.6.3 | 50 | 000000000 | 00000 |
10-32 | ||||||||||
| 3/8" | Fully Threaded | Standard | 0.362" | 0.116" | No. 2 | 80,000 | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 1/2" | Fully Threaded | Standard | 0.362" | 0.116" | No. 2 | 80,000 | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 3/4" | Fully Threaded | Standard | 0.362" | 0.116" | No. 2 | 80,000 | ASME B18.6.3 | 50 | 000000000 | 00000 |
| 1" | Fully Threaded | Standard | 0.362" | 0.116" | No. 2 | 80,000 | ASME B18.6.3 | 25 | 000000000 | 00000 |
1/4"-20 | ||||||||||
| 3/8" | Fully Threaded | Undercut | 0.477" | 0.153" | No. 3 | 80,000 | ASME B18.6.3 | 25 | 000000000 | 00000 |
| 1/2" | Fully Threaded | Standard | 0.477" | 0.153" | No. 3 | 80,000 | ASME B18.6.3 | 25 | 000000000 | 00000 |
| 3/4" | Fully Threaded | Standard | 0.477" | 0.153" | No. 3 | 80,000 | ASME B18.6.3 | 25 | 000000000 | 00000 |
| 1" | Fully Threaded | Standard | 0.477" | 0.153" | No. 3 | 80,000 | ASME B18.6.3 | 10 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | Standard | 0.477" | 0.153" | No. 3 | 80,000 | ASME B18.6.3 | 10 | 000000000 | 00000 |
Stainless Steel Hex Screw and Nut Kits for Pipe Flanges
Join standard-sized stainless steel and aluminum pipe flanges in corrosive conditions. These kits come with the right size and number of screws and nuts for the bolt holes in each pipe size. For a tight seal, you’ll also need a gasket between the flanges. All screws and nuts meet ASTM and ASME standards or DIN standards for material quality and dimensions. They may be mildly magnetic. Screw length is measured from under the head.
316 stainless steel fasteners are more corrosion resistant than 18-8 stainless steel fasteners and have excellent resistance to chemicals and salt water.
Kits with blue PTFE-coated nuts thread together with the screws smoothly thanks to the slippery coating on the nut. The coating also resists chemicals, so it doesn't compromise their corrosion resistance.
Screw | Nut | 316 Stainless Steel with Blue PTFE-Coated Nuts | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| For Pipe Size | Lg. | Min. Thread Lg. | Head Wd. | Head Ht. | Tensile Strength, psi | Wd. | Ht. | No. of Screws Included | No. of Nuts Included | Each | |
1/2"-13 | |||||||||||
| 1/2, 3/4 | 2" | 1 1/4" | 3/4" | 11/32" | 80,000 | 3/4" | 7/16" | 4 | 4 | 000000000 | 000000 |
| 1, 1 1/4 | 2 1/4" | 1 1/4" | 3/4" | 11/32" | 80,000 | 3/4" | 7/16" | 4 | 4 | 000000000 | 00000 |
| 1 1/2 | 2 1/2" | 1 1/4" | 3/4" | 11/32" | 80,000 | 3/4" | 7/16" | 4 | 4 | 000000000 | 00000 |
5/8"-11 | |||||||||||
| 2 | 2 3/4" | 1 1/2" | 15/16" | 27/64" | 80,000 | 15/16" | 35/64" | 4 | 4 | 000000000 | 00000 |
| 2 1/2, 3 | 3" | 1 1/2" | 15/16" | 27/64" | 80,000 | 15/16" | 35/64" | 4 | 4 | 000000000 | 00000 |
| 4 | 3" | 1 1/2" | 15/16" | 27/64" | 80,000 | 15/16" | 35/64" | 8 | 8 | 000000000 | 00000 |
3/4"-10 | |||||||||||
| 6 | 3 1/4" | 1 3/4" | 1 1/8" | 1/2" | 80,000 | 1 1/8" | 41/64" | 8 | 8 | 000000000 | 00000 |
| 8 | 3 1/2" | 1 3/4" | 1 1/8" | 1/2" | 80,000 | 1 1/8" | 41/64" | 8 | 8 | 000000000 | 00000 |
7/8"-9 | |||||||||||
| 10, 12 | 4" | 2" | 1 5/16" | 37/64" | 80,000 | 1 5/16" | 3/4" | 12 | 12 | 000000000 | 000000 |
Screw | Nut | 316 Stainless Steel with Blue PTFE-Coated Nuts | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| For Pipe Size | Lg. | Min. Thread Lg. | Head Wd. | Head Ht. | Tensile Strength, psi | Wd. | Ht. | No. of Screws Included | No. of Nuts Included | Each | |
1/2"-13 | |||||||||||
| 1/2 | 2 1/4" | 1 1/4" | 3/4" | 11/32" | 80,000 | 3/4" | 7/16" | 4 | 4 | 000000000 | 000000 |
5/8"-11 | |||||||||||
| 3/4, 1 | 2 1/2" | 1 1/2" | 15/16" | 27/64" | 80,000 | 15/16" | 35/64" | 4 | 4 | 000000000 | 00000 |
| 1 1/4 | 2 3/4" | 1 1/2" | 15/16" | 27/64" | 80,000 | 15/16" | 35/64" | 4 | 4 | 000000000 | 00000 |
| 2 | 3" | 1 1/2" | 15/16" | 27/64" | 80,000 | 15/16" | 35/64" | 8 | 8 | 000000000 | 00000 |
3/4"-10 | |||||||||||
| 1 1/2 | 3" | 1 3/4" | 1 1/8" | 1/2" | 80,000 | 1 1/8" | 41/64" | 4 | 4 | 000000000 | 00000 |
| 3 1/2, 4 | 3 3/4" | 1 3/4" | 1 1/8" | 1/2" | 80,000 | 1 1/8" | 41/64" | 8 | 8 | 000000000 | 000000 |