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Stainless Hex Head Vented Machine Screw: 5/16-18 x 1-1/4
SKU
J30-764-49020
Special Price $3.09 $ 3.09 Regular Price $4.41 $ 4.41
The J30-764-49020 from Industrial Hardware and Specialties is a chemically cleaned, stainless type 18-8, vented hex head machine screw. The vented machine screw is 1-1/4" ( 1.25 ) long with a diameter thread pitch of 5/16-18 ( UNC-2A ). The Stainless Hex Head Vented Machine Screw: 5/16-18 x 1-1/4 requires a 1/2" hex (external) for installation. The hex head vented machine screw is drilled with a 0.078" hole to allow for trapped gases to escape. It meets fastener standard ANSI/ASME B18.6.3, and thread standard ANSI/ASME B1.1.
Industrial Hardware and Specialties vented caps screws are ideally suited for fastening inside high vacuum (UV), or ultra high vacuum (UHV) equipment as well as other high pressure environments. The Stainless Hex Head Vented Machine Screw: 5/16-18 x 1-1/4 comes with a 0.078" hole drilled through it's head. This feature helps to eliminate the possibility of virtual leaks as the hole allows gas molecules to vent into the vacuum system through the top of fastener and out of the system. This vented machine screw is made from stainless steel type 18-8 with a chemically cleaned finish. The J30-764-49020 has a hex head, is 1-1/4" ( 1.25 ) long with a diameter thread pitch of 5/16-18 ( UNC-2A ). The Stainless Hex Head Vented Machine Screw: 5/16-18 x 1-1/4 requires a 1/2" hex (external) for installation.
| Vendor | InSpec |
|---|---|
| Fastener Type | Vented Machine Screw |
| Fastener Standard | ANSI/ASME B18.6.3 |
| Drive Type | Hex (External) |
| Head Style | Hex Head |
| Diameter Thread Pitch (in) | 5/16-18 |
| Thread Class Fit | UNC-2A |
| Length (in.) | 1-1/4 |
| Point Type | Flat or Slightly Concave & Chamfered |
| Material | Stainless Type 18-8 |
| Finish | Chemically Cleaned |
| Thread Standard | ANSI/ASME B1.1 |
| Vent Hole Dia. (Nominal) (in.) | 0.078 |
| Hole Tolerance (in.) | +0.003 / -0.010 |
| Drive Size | 1/2 |
| Head Height (in.) | 0.230 / 0.208 |
| Width Across Flats (in.) | 0.500 / 0.489 |
| Width Across Corners (in.) | 0.545 |
