Stainless Steel18-8Passivated
811085-5000
#4-40 x 1/2" Tamper Resistant Socket Head Cap Screws / 18-8 Stainless Steel / Passivated
$296.10 – $4,406.25
Bulk Box (5,000 pcs)
$4,406.25
#4-40 Socket Head Cap Screws
119 products
#4-40 Socket Head Cap Screws in all available lengths, grades, materials, and finishes. This collection covers every #4-40 option in stock — use the filters to narrow by length, grade, material, and finish.
#4-40 Thread Specifications
- Nominal diameter: 0.112"
- Threads per inch: 40
- Tap drill (75% thread): #43 (0.089")
- Clearance hole (close fit): #31 (0.120")
- Clearance hole (free fit): #30 (0.128")
To thread a #4-40 hole, drill with a #43 (0.089") tap drill for a standard 75% thread. For a clearance hole that the #4-40 screw passes through, use #31 (0.120") for a close fit or #30 (0.128") for a free fit. Pair with a matching #4-40 nut or tapped hole.
Orders before 12 PM ET ship same day.
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Stainless Steel18-8Passivated592699-100#4-40 x 1" Socket Head Cap Screws / 18-8 Stainless Steel / Passivated
$20.50Package (100 pcs) $20.50
SteelZinc872617-2500#4-40 x 5/16" Socket Head Cap Screws / Alloy Steel / Zinc Bake
$23.10 – $171.88Bulk Box (2,500 pcs) $171.88
SteelZinc872619-2500#4-40 x 1" Socket Head Cap Screws / Alloy Steel / Zinc Bake
$28.40 – $211.28Bulk Box (2,500 pcs) $211.28
SteelZinc872618-2500#4-40 x 7/8" Socket Head Cap Screws / Alloy Steel / Zinc Bake
$25.30 – $188.28Bulk Box (2,500 pcs) $188.28
SteelZinc872037-2500#4-40 x 1/2" Socket Head Cap Screws, Full Thread / Alloy Steel / Zinc Bake
$25.72 – $191.38Bulk Box (2,500 pcs) $191.38
SteelZinc872035-2500#4-40 x 3/8" Socket Head Cap Screws, Full Thread / Alloy Steel / Zinc Bake
$24.04 – $178.88Bulk Box (2,500 pcs) $178.88
SteelZinc872039-2500#4-40 x 5/8" Socket Head Cap Screws, Full Thread / Alloy Steel / Zinc Bake
$26.43 – $196.69Bulk Box (2,500 pcs) $196.69
SteelZinc872041-2500#4-40 x 3/4" Socket Head Cap Screws, Full Thread / Alloy Steel / Zinc Bake
$27.85 – $207.23Bulk Box (2,500 pcs) $207.23
SteelZinc872033-2500#4-40 x 1/4" Socket Head Cap Screws, Full Thread / Alloy Steel / Zinc Bake
$23.75 – $176.69Bulk Box (2,500 pcs) $176.69
SteelZinc837037-1000#4-40 x 1/2" Socket Head Cap Screws, Full Thread / Alloy Steel / Mechanical Zinc
$139.22 – $414.34Bulk Box (1,000 pcs) $414.34
SteelZinc837041-1000#4-40 x 3/4" Socket Head Cap Screws, Full Thread / Alloy Steel / Mechanical Zinc
$153.70 – $457.43Bulk Box (1,000 pcs) $457.43
SteelZinc837039-1000#4-40 x 5/8" Socket Head Cap Screws, Full Thread / Alloy Steel / Mechanical Zinc
$143.47 – $426.98Bulk Box (1,000 pcs) $426.98
SteelZinc837035-1000#4-40 x 3/8" Socket Head Cap Screws, Full Thread / Alloy Steel / Mechanical Zinc
$133.35 – $396.88Bulk Box (1,000 pcs) $396.88
SteelZinc837033-1000#4-40 x 1/4" Socket Head Cap Screws, Full Thread / Alloy Steel / Mechanical Zinc
$131.50 – $391.37Bulk Box (1,000 pcs) $391.37
SteelThermal Black Oxide430126-100#4-40 x 3" Socket Head Cap Screws, Full Thread / Alloy Steel / Thermal Black Oxide / Made in USA / DFAR Compliant
$1,970.08 – $21,987.50Package (100 pcs) $1,970.08
SteelThermal Black Oxide430114-5600#4-40 x 2 1/4" Socket Head Cap Screws, Partial Thread / Alloy Steel / Thermal Black Oxide / Made in USA / DFAR Compliant
$197.01 – $49,252.00Bulk Box (5,600 pcs) $49,252.00
SteelThermal Black Oxide307040-2500#4-40 x 1/4" Socket Head Cap Screws (1936 Series), Full Thread / Alloy Steel / Thermal Black Oxide
$89.67 – $667.19Bulk Box (2,500 pcs) $667.19
SteelThermal Black Oxide307044-2500#4-40 x 1/2" Socket Head Cap Screws (1936 Series), Full Thread / Alloy Steel / Thermal Black Oxide
$161.67 – $1,202.94Bulk Box (2,500 pcs) $1,202.94
SteelThermal Black Oxide307048-2500#4-40 x 3/4" Socket Head Cap Screws (1936 Series), Full Thread / Alloy Steel / Thermal Black Oxide
$95.52 – $710.75Bulk Box (2,500 pcs) $710.75
SteelThermal Black Oxide307049-100#4-40 x 7/8" Socket Head Cap Screws / Alloy Steel / Black Oxide
$298.83Package (100 pcs) $298.83
SteelThermal Black Oxide307050-2500#4-40 x 1" Socket Head Cap Screws (1936 Series), Partial Thread / Alloy Steel / Thermal Black Oxide
$298.83 – $2,223.44Bulk Box (2,500 pcs) $2,223.44
SteelThermal Black Oxide307046-2500#4-40 x 5/8" Socket Head Cap Screws (1936 Series), Full Thread / Alloy Steel / Thermal Black Oxide
$92.93 – $691.44Bulk Box (2,500 pcs) $691.44
SteelThermal Black Oxide307042-2500#4-40 x 3/8" Socket Head Cap Screws (1936 Series), Full Thread / Alloy Steel / Thermal Black Oxide
$92.03 – $684.75Bulk Box (2,500 pcs) $684.75
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