Stainless Slotted Flat Head Vented Machine Screw: 1/4-20 x 1/2

SKU
J30-762-44008
Special Price $ 1.22 Regular Price $ 1.74

The J30-762-44008 from Industrial Hardware and Specialties is a chemically cleaned, stainless type 18-8, vented flat head machine screw. The vented machine screw is 1/2" ( 0.5 ) long with a diameter thread pitch of 1/4-20 ( UNC-2A ). The Stainless Slotted Flat Head Vented Machine Screw: 1/4-20 x 1/2 requires a slotted drive for installation. The slotted flat head vented machine screw is drilled with a 0.063" 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 Slotted Flat Head Vented Machine Screw: 1/4-20 x 1/2 comes with a 0.063" 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 J30-762-44008 has a flat head, is 1/2" ( 0.5 ) long with a diameter thread pitch of 1/4-20 ( UNC-2A ). The Stainless Slotted Flat Head Vented Machine Screw: 1/4-20 x 1/2 requires a slotted drive for installation.

More Information
VendorInSpec
Fastener Type Vented Machine Screw
Fastener StandardANSI/ASME B18.6.3
Drive TypeSlotted
Head StyleFlat Head
Diameter Thread Pitch (in)1/4-20
Thread Class FitUNC-2A
Length (in.)1/2
Point TypeFlat or Slightly Concave & Chamfered
MaterialStainless Type 18-8
FinishChemically Cleaned
Thread Standard ANSI/ASME B1.1
Vent Hole Dia. (Nominal) (in.)0.063
Hole Tolerance (in.)+0.003 / -0.010
Slot Width Range (in.)0.075 /0.064
Slot Depth (in.)0.070 / 0.046
Head Height (in.)0.153
Head Diameter ⌀0.507 / 0.452