Blog Fasteners101 FAQ's Reviews About Us Sign In / Create an Account
Go to homepage
Shipping Info
Request A Quote
Live Chat
CONTACT US
866-573-0445
Mon-Fri 8am-5pm EST
0
Shopping cart
0 / $0.00*
Orders & Buy Again
Skip image gallery
Print this page

Tamper Proof Machine Screws, Star Pin-In Button Head, Stainless Steel 18-8, (T-8) #4-40 x 1/4

Diameter - Thread Pitch: #4-40

  • Tamper Proof Star Drive Size - T-8
  • Torx styled Star (with pin) drive add security to machine screws by using an uncommon drive
  • Less likely to strip than Phillips when installed correctly
  • Primarily for metal to metal applications
  • A machine screw is commonly identified by its small size
  • 18-8 Stainless steel is the fastener industry standard adding rust and corrosion resistance to an assembly

#4-40 Star with pin button head security machine screws are available in grade 18-8 stainless steel.

Product number: 840002
Print this page
Click on a size/sku in the table to view product-specific details and specifications.

Specifications

  • Color: Silver
  • Condition: New
  • Corrosion Resistant: Yes
  • Diameter: #4
  • Drive Style: Star (with Pin)
  • Head Type: Button Head
  • Tamper Proof: Yes
  • Thread Direction: Right Hand
  • Thread Type: Coarse
  • Fit: 2A
  • Grade: 18-8
  • Head Height Max: 0.06
  • Head Diameter: Max 0.208 - Min 0.200
  • Head Style: Button
  • Length: 1/4
  • Material: Stainless Steel
  • Overall Head Height: Max 0.060 - Min 0.055
  • Part Number: 618930280296
  • Product Type: Tamper Proof Machine Screws
  • Size Type: Regular
  • System of Measurement: Inch
  • Thread Direction: Right Hand
  • Thread Pitch: 40 Per Inch
  • Thread Size: #4-40
  • Thread Standard: UNC
  • Thread Type: Coarse
  • Tolerance (IFI): Actual measurements may vary slightly +/- depending on production run within IFI Tolerances
  • Star TP Drive: T-8
  • Weight: 1 lb
Select Size/SKU & Quantity
3 Available Sizes
SIZE/SKU Review Volume Pricing* Enter Any Qty
#4-40 x 1/4"
840002
1
$0.53 ($0.53/ea)
100
$48.00 ($0.48/ea)
1000
$450.00 ($0.45/ea)
$0.00
#4-40 x 3/8"
840012
1
$0.59 ($0.59/ea)
100
$56.00 ($0.56/ea)
1000
$520.00 ($0.52/ea)
$0.00
#4-40 x 1/2"
840022
1
$0.65 ($0.65/ea)
100
$59.00 ($0.59/ea)
1000
$580.00 ($0.58/ea)
$0.00

Frequently Used With

Flat Washers, Stainless Steel 304, #4 (.125 ID x .312 OD x .031 Thick) Flat Washers, Stainless Steel 304, #4 (.125 ID x .312 OD x .031 Thick)
Volume Pricing*
1
$0.07
($0.07/ea)
100
$2.00
($0.02/ea)
1000
$10.00
($0.01/ea)
$0.00
Lock Washers, Split Ring, Stainless Steel 304, #4 (.114 ID x .209 OD x .025 Thick) Lock Washers, Split Ring, Stainless Steel 304, #4 (.114 ID x .209 OD x .025 Thick)
Volume Pricing*
1
$0.07
($0.07/ea)
100
$3.00
($0.03/ea)
1000
$20.00
($0.02/ea)
$0.00
Hex Machine Nuts, Stainless Steel 304, #4-40 (1/4 Flats x 3/32 Thick) Hex Machine Nuts, Stainless Steel 304, #4-40 (1/4 Flats x 3/32 Thick)
Volume Pricing*
1
$0.07
($0.07/ea)
100
$4.00
($0.04/ea)
1000
$30.00
($0.03/ea)
$0.00
Nylon Lock Nuts, Stainless Steel 304, #4-40 (.251 Flats x .153 Height) Nylon Lock Nuts, Stainless Steel 304, #4-40 (.251 Flats x .153 Height)
Volume Pricing*
1
$0.07
($0.07/ea)
100
$4.00
($0.04/ea)
1000
$30.00
($0.03/ea)
$0.00
Tamper Proof Insert Bits, Star Drive 6-Lobe Torx, T-8 Tamper Proof Insert Bits, Star Drive 6-Lobe Torx, T-8
Volume Pricing*
1
$1.37
($1.37/ea)
100
$115.00
($1.15/ea)
1000
$1,110.00
($1.11/ea)
$0.00
Star Drive Tamper Proof T8 Round Blade Screwdriver Star Drive Tamper Proof T8 Round Blade Screwdriver
Volume Pricing*
$7.80 ea.
$0.00
MRO Solution 2400, Marine Grade Anti-Seize Lubricant, 8 oz. MRO Solution 2400, Marine Grade Anti-Seize Lubricant, 8 oz.
Volume Pricing*
$20.03 ea.
$0.00

*Volume pricing available on select products. Products without quantity breaks are priced per unit.

Page Total: $0.00

Subscribe to our regular newsletter now to stay tuned on the latest products and special offers.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Privacy*
This website uses cookies to ensure the best experience possible. More information...