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About Hex Head Screws and Bolts
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Choose a hex head fastener with the right threading, thread size, material, and strength for your equipment.
Venting Stainless Steel Hex Head Screws
 |  |
Fully Threaded | Partially Threaded |
Prevent the buildup of pressure or vacuum in sealed spaces. The hole in the center of these corrosion-resistant screws allows air, gas, and fluid to escape. They are often used to equalize pressure from high temperatures during coating, curing, and heating. The head's six flat sides keep wrenches and sockets from slipping and rounding off the drive.
Length is measured from under the head.
18-8 Stainless Steel—The choice for wet and outdoor environments, these screws won't rust. However, they don't hold up to the harsh chemicals that 316 stainless steel screws can.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Wd. | Ht. | Vent Dia. | Threading | Thread Spacing | Tensile Strength, psi | Each | |||
18-8 Stainless Steel | ||||||||||
1/4"-20 | ||||||||||
| 1/2" | 7/16" | 5/32" | 0.062" | Fully Threaded | Coarse | 70,000 | 90220A110 | 00000 | ||
| 3/4" | 7/16" | 5/32" | 0.062" | Fully Threaded | Coarse | 70,000 | 90220A120 | 0000 | ||
| 1" | 7/16" | 5/32" | 0.062" | Fully Threaded | Coarse | 70,000 | 90220A130 | 0000 | ||
5/16"-18 | ||||||||||
| 3/4" | 1/2" | 13/64" | 0.078" | Fully Threaded | Coarse | 70,000 | 90220A140 | 0000 | ||
| 1" | 1/2" | 13/64" | 0.078" | Fully Threaded | Coarse | 70,000 | 90220A150 | 0000 | ||
| 1 1/2" | 1/2" | 13/64" | 0.078" | Partially Threaded | Coarse | 70,000 | 90220A160 | 00000 | ||
3/8"-16 | ||||||||||
| 3/4" | 9/16" | 15/64" | 0.093" | Fully Threaded | Coarse | 70,000 | 90220A170 | 0000 | ||
| 1" | 9/16" | 15/64" | 0.093" | Fully Threaded | Coarse | 70,000 | 90220A180 | 0000 | ||
| 1 1/2" | 9/16" | 15/64" | 0.093" | Partially Threaded | Coarse | 70,000 | 90220A190 | 00000 | ||
1/2"-13 | ||||||||||
| 1" | 3/4" | 5/16" | 1/8" | Fully Threaded | Coarse | 70,000 | 90220A210 | 00000 | ||
| 1 1/2" | 3/4" | 5/16" | 1/8" | Fully Threaded | Coarse | 70,000 | 90220A220 | 00000 | ||
| 2" | 3/4" | 5/16" | 1/8" | Partially Threaded | Coarse | 70,000 | 90220A230 | 00000 | ||
