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

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

Diameter - Thread Pitch: #4-40 | Security Star Drive Size - T-8

  • 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.

Select Products Below See Product Specifications
NA = "Not Sold In Single Quantity"

Size/SKU
Select Package Quantity Price
SubTotal
#4-40 x 1/4"
SKU #840002
#4-40 x 1/4"
SKU #840002
1 $0.53 (0.53/ea)
100 $48.00 (0.48/ea)
1000 $450.00 (0.45/ea)
Subtotal: $0.00 /
#4-40 x 3/8"
SKU #840012
#4-40 x 3/8"
SKU #840012
1 $0.59 (0.59/ea)
100 $56.00 (0.56/ea)
1000 $520.00 (0.52/ea)
Subtotal: $0.00 /
#4-40 x 1/2"
SKU #840022
#4-40 x 1/2"
SKU #840022
1 $0.65 (0.65/ea)
100 $59.00 (0.59/ea)
1000 $580.00 (0.58/ea)
Subtotal: $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) 1000-105092
Flat Washers, Stainless Steel 304, #4 (.125 ID x .312 OD x .031 Thick)
1 $0.07 (0.07/ea)
100 $2.00 (0.02/ea)
1000 $10.00 (0.01/ea)
Subtotal: $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) 108042
Lock Washers, Split Ring, Stainless Steel 304, #4 (.114 ID x .209 OD x .025 Thick)
1 $0.07 (0.07/ea)
100 $3.00 (0.03/ea)
1000 $20.00 (0.02/ea)
Subtotal: $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) 125052
Hex Machine Nuts, Stainless Steel 304, #4-40 (1/4 Flats x 3/32 Thick)
1 $0.07 (0.07/ea)
100 $4.00 (0.04/ea)
1000 $30.00 (0.03/ea)
Subtotal: $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) 128012
Nylon Lock Nuts, Stainless Steel 304, #4-40 (.251 Flats x .153 Height)
1 $0.07 (0.07/ea)
100 $4.00 (0.04/ea)
1000 $30.00 (0.03/ea)
Subtotal: $0.00
Tamper Proof Insert Bits, Star Drive 6-Lobe Torx, T-8
Tamper Proof Insert Bits, Star Drive 6-Lobe Torx, T-8 1011012
Tamper Proof Insert Bits, Star Drive 6-Lobe Torx, T-8
1 $1.37 (1.37/ea)
100 $115.00 (1.15/ea)
1000 $1,110.00 (1.11/ea)
Subtotal: $0.00
Star Drive Tamper Proof T8 Round Blade Screwdriver
Star Drive Tamper Proof T8 Round Blade Screwdriver 10112-0006-0002
Star Drive Tamper Proof T8 Round Blade Screwdriver
1 $7.80 (7.8/ea)
Subtotal: $0.00
MRO Solution 2400, Marine Grade Anti-Seize Lubricant, 8 oz.
MRO Solution 2400, Marine Grade Anti-Seize Lubricant, 8 oz. 1050-106
MRO Solution 2400, Marine Grade Anti-Seize Lubricant, 8 oz.
MRO Solution 2400, Marine Grade Anti-Seize Lubricant, 8 oz. Prevent Fastener Galling & Locking Up with Anti-Seize Lubricants
Our Price: $18.11
Subtotal: $0.00
Product Specifications
Product Specifications
Color
Silver
Corrosion Resistant
Yes
Diameter
#4
Drive Style
Star (with Pin)
Grade
18-8
Head Diameter
Max 0.208 - Min 0.200
Head Height Max
0.06
Head Style
Button
Material
Stainless Steel
Overall Head Height
Max 0.060 - Min 0.055
Product Type
Tamper Proof Machine Screws
System of Measurement (Unit)
Inch
Thread Direction
Right Hand
Thread Pitch (Count)
40 Per Inch
Thread Standard
UNC
Thread Type
Coarse
Tolerance (IFI)
Actual measurements may vary slightly +/- depending on production run within IFI Tolerances
Torx TP Drive
T-8

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Volume Pricing: Buy in volume, get a discount. The larger the pack, the lower the cost per piece. Visit the New Site Features Page for additional details.