Stainless Phillips Pan Head Vented Machine Screw: 4-40 x 1/2

SKU
J30-756-15008
Special Price $ 2.23 Regular Price $ 3.07

The J30-756-15008 from Industrial Hardware and Specialties is a chemically cleaned, stainless type 18-8, vented pan head machine screw. The vented machine screw is 1/2" ( 0.5 ) long with a diameter thread pitch of 4-40 ( UNC-2A ). The Stainless Phillips Pan Head Vented Machine Screw: 4-40 x 1/2 requires a #1 phillips ( cross recessed type 1 ) drive for installation. The phillips pan head vented machine screw is drilled with 0.039 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 Phillips Pan Head Vented Machine Screw: 4-40 x 1/2 comes with a 0.039 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 J30-756-15008 has a pan head, is 1/2" ( 0.5 ) long with a diameter thread pitch of 4-40 ( UNC-2A ). The Stainless Phillips Pan Head Vented Machine Screw: 4-40 x 1/2 requires a #1 phillips ( cross recessed type 1 ) drive for installation.

More Information
VendorInSpec
Fastener Type Vented Machine Screw
Fastener StandardANSI/ASME B18.6.3
Drive TypePhillips ( Cross Recessed Type 1 )
Head StylePan Head
Diameter Thread Pitch (in)4-40
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.)0.039
Hole Tolerance (in.)+0.005 / -0.005
Drive Size#1
Head Height (in.)0.068 / 0.058
Head Diameter ⌀0.219 / 0.205