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#4-40 Flat Socket Head Screws Black Oxide 18-8 Stainless Steel

#4-40 Black Stainless Steel Flat Head Socket Cap Screws

Screw Diameter - Thread Pitch: #4-40

#4-40 Flat Head Socket Cap Screws are machine screws with a Hex or Allen drive style.

  • Clean and unstamped flat head with a countersunk bottom that runs flush with the installation surface
  • Head height is measured from the bottom of the countersink to the top of the head
  • Cylindrical head and hexagonal drive style
  • Fully threaded up to the countersink
  • Black Oxide adds an extra layer of corrosion and abrasion resistance
  • Creates a sleek black look
Black Oxide 18-8 Stainless Steel is used on black tools, gun builders and car and motorcycles looking for that black sleek look.

These fasteners are chemically treated to create the back oxide finish and are finished with wax.

Sizes Listed As:
Diameter - Thread Pitch x Length from Top of Head

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

Size
Select Package Quantity
SubTotal
Flat Socket Head Screw Black Oxide 18-8 SS - #4-40 x 1/4"
SKU #12232002
Flat Socket Head Screw Black Oxide 18-8 SS - #4-40 x 1/4"
SKU #12232002
1
 $0.20 (0.2/ea)
100
 $14.00 (0.14/ea)
1000
 $130.00 (0.13/ea)
Subtotal: $0.00 /
Flat Socket Head Screw Black Oxide 18-8 SS - #4-40 x 5/16"
SKU #12232014
Flat Socket Head Screw Black Oxide 18-8 SS - #4-40 x 5/16"
SKU #12232014
1
 $0.08 (0.08/ea)
100
 $7.00 (0.07/ea)
1000
 $60.00 (0.06/ea)
Subtotal: $0.00 /
Flat Socket Head Screw Black Oxide 18-8 SS - #4-40 x 3/8"
SKU #12232026
Flat Socket Head Screw Black Oxide 18-8 SS - #4-40 x 3/8"
SKU #12232026
1
 $0.24 (0.24/ea)
100
 $20.00 (0.2/ea)
1000
 $180.00 (0.18/ea)
Subtotal: $0.00 /



FREQUENTLY USED WITH

Hex Socket Head Power Bits - 1/16 - Length 2"
Hex Socket Head Power Bits - 1/16 - Length 2" 1050-800-0006
Hex Socket Head Power Bits - 1/16 - Length 2
1
 $3.35 (3.35/ea)
10
 $29.80 (2.98/ea)
50
 $129.50 (2.59/ea)
Subtotal: $0.00 /
Hex Allen Key Short Arm 1/16 Black Alloy
Hex Allen Key Short Arm 1/16 Black Alloy 1055-20008-0002
Hex Allen Key Short Arm 1/16 Black Alloy
1
 $0.16 (0.16/ea)
100
 $12.00 (0.12/ea)
1000
 $70.00 (0.07/ea)
Subtotal: $0.00 /
Hex Allen Key Long Arm 1/16" Black Alloy
Hex Allen Key Long Arm 1/16" Black Alloy 1055-10008-0002
Hex Allen Key Long Arm 1/16
1
 $0.20 (0.2/ea)
100
 $18.00 (0.18/ea)
1000
 $160.00 (0.16/ea)
Subtotal: $0.00 /
Hex Machine Nuts Black Oxide 18-8 SS - #4-40 (1/4 Flats x 3/32 Thick)
Hex Machine Nuts Black Oxide 18-8 SS - #4-40 (1/4 Flats x 3/32 Thick) 12300014
Hex Machine Nuts Black Oxide 18-8 SS - #4-40 (1/4 Flats x 3/32 Thick)
1
 $0.15 (0.15/ea)
100
 $8.00 (0.08/ea)
1000
 $70.00 (0.07/ea)
Subtotal: $0.00 /
Flat Washer Black Oxide 18-8 SS - #4 (0.125 ID x 0.312 OD x 1/32 Thick)
Flat Washer Black Oxide 18-8 SS - #4 (0.125 ID x 0.312 OD x 1/32 Thick) 12290014
Flat Washer Black Oxide 18-8 SS - #4 (0.125 ID x 0.312 OD x 1/32 Thick)
1
 $0.09 (0.09/ea)
100
 $6.00 (0.06/ea)
1000
 $50.00 (0.05/ea)
Subtotal: $0.00 /
Product Specifications
Color
Black
Corrosion Resistant
Yes
Countersink
82 Degrees
Drive Style
Internal Hex (Allen)
Finish
Black Oxide
Grade
18-8
Head Diameter
Max 0.225 - Min 0.218
Head Style
Flat
Hex Drive
1/16"
Material
Stainless Steel
Product Type
Flat Head Socket Cap Screw
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

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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.