This is a demo store. No orders will be fulfilled.

Industrial Hardware and Specialties is classified as an ESSENTIAL business and is fully operational.

Please read our COVID-19 Message To Our Customers.

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

‎â€â€â€Ž ‎

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.

Attributes

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.

More Information
VendorInSpec
Fastener Type Vented Machine Screw
Fastener StandardANSI/ASME B18.6.3
Drive TypeHex (External)
Head StyleHex Head
Diameter Thread Pitch (in)5/16-18
Thread Class FitUNC-2A
Length (in.)1-1/4
Point TypeFlat or Slightly Concave & Chamfered
MaterialStainless Type 18-8
FinishChemically Cleaned
Thread Standard ANSI/ASME B1.1
Vent Hole Dia. (Nominal) (in.)0.078
Hole Tolerance (in.)+0.003 / -0.010
Drive Size1/2
Head Height (in.)0.230 / 0.208
Width Across Flats (in.)0.500 / 0.489
Width Across Corners (in.)0.545