► Socket Screws

Socket Screws – Fasteners for Precision Assembly & High-Torque Applications Socket screws, also known as Allen screws or hex socket screws, are designed for high-strength, precision fastening in machinery, fabrication, & equipment assembly. With internal hex drives, they enable tight installation in confined spaces & deliver superior torque transfer. Available...

Socket Screws – Fasteners for Precision Assembly & High-Torque Applications

Socket screws, also known as Allen screws or hex socket screws, are designed for high-strength, precision fastening in machinery, fabrication, & equipment assembly. With internal hex drives, they enable tight installation in confined spaces & deliver superior torque transfer. Available in cap head, button head, & countersunk varieties, our socket screws are ideal for mechanical repairs, tooling setups, & metalwork builds.

What’s in This Collection:
► Socket cap screws for strong mechanical joints
► Button head & countersunk options for low-profile assembly
► Metric & imperial sizes in alloy, stainless, & black oxide
► Precision-machined threads for accurate fit
► Bulk packs for manufacturing & repair workshops

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  • BBI - #6-32x3/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11055
    BBI - #6-32x3/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11055
    BBI - #6-32x3/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11055This BBI #6-32x3/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #6-32x3/8" Thread: UNC Grade: Class 12.9 for reliable...
    $0.48
    $0.48
  • BBI - #6-32x1/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11053
    BBI - #6-32x1/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11053
    BBI - #6-32x1/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11053This BBI #6-32x1/4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #6-32x1/4" Thread: UNC Grade: Class 12.9 for reliable...
    $0.41
    $0.41
  • BBI - #5-40x3/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11051
    BBI - #5-40x3/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11051
    BBI - #5-40x3/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11051This BBI #5-40x3/4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #5-40x3/4" Thread: UNC Grade: Class 12.9 for reliable...
    $0.50
    $0.50
  • BBI - #5-40x5/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11049
    BBI - #5-40x5/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11049
    BBI - #5-40x5/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11049This BBI #5-40x5/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #5-40x5/8" Thread: UNC Grade: Class 12.9 for reliable...
    $0.44
    $0.44
  • BBI - #5-40x1/2" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11047
    BBI - #5-40x1/2" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11047
    BBI - #5-40x1/2" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11047This BBI #5-40x1/2" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #5-40x1/2" Thread: UNC Grade: Class 12.9 for reliable...
    $0.42
    $0.42
  • BBI - #5-40x3/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11045
    BBI - #5-40x3/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11045
    BBI - #5-40x3/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11045This BBI #5-40x3/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #5-40x3/8" Thread: UNC Grade: Class 12.9 for reliable...
    $0.38
    $0.38
  • BBI - #5-40x1/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11043
    BBI - #5-40x1/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11043
    BBI - #5-40x1/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11043This BBI #5-40x1/4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #5-40x1/4" Thread: UNC Grade: Class 12.9 for reliable...
    $0.33
    $0.33
  • BBI - #4-40x3/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11041
    BBI - #4-40x3/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11041
    BBI - #4-40x3/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11041This BBI #4-40x3/4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #4-40x3/4" Thread: UNC Grade: Class 12.9 for reliable...
    $1.00
    $1.00
  • BBI - #4-40x5/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11039
    BBI - #4-40x5/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11039
    BBI - #4-40x5/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11039This BBI #4-40x5/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #4-40x5/8" Thread: UNC Grade: Class 12.9 for reliable...
    $0.75
    $0.75
  • BBI - #4-40x1/2" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11037
    BBI - #4-40x1/2" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11037
    BBI - #4-40x1/2" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11037This BBI #4-40x1/2" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #4-40x1/2" Thread: UNC Grade: Class 12.9 for reliable...
    $0.72
    $0.72
  • BBI - #4-40x3/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11035
    BBI - #4-40x3/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11035
    BBI - #4-40x3/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11035This BBI #4-40x3/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #4-40x3/8" Thread: UNC Grade: Class 12.9 for reliable...
    $0.71
    $0.71
  • BBI - #4-40x1/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11033
    BBI - #4-40x1/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11033
    BBI - #4-40x1/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11033This BBI #4-40x1/4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #4-40x1/4" Thread: UNC Grade: Class 12.9 for reliable...
    $0.68
    $0.68
  • BBI - #3-48x1/2" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11031
    BBI - #3-48x1/2" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11031
    BBI - #3-48x1/2" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11031This BBI #3-48x1/2" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #3-48x1/2" Thread: UNC Grade: Class 12.9 for reliable...
    $0.85
    $0.85
  • BBI - #3-48x3/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11029
    BBI - #3-48x3/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11029
    BBI - #3-48x3/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11029This BBI #3-48x3/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #3-48x3/8" Thread: UNC Grade: Class 12.9 for reliable...
    $0.82
    $0.82
  • BBI - #3-48x1/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11027
    BBI - #3-48x1/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11027
    BBI - #3-48x1/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11027This BBI #3-48x1/4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #3-48x1/4" Thread: UNC Grade: Class 12.9 for reliable...
    $0.73
    $0.73
  • BBI - #3-48x3/16" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11025
    BBI - #3-48x3/16" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11025
    BBI - #3-48x3/16" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11025This BBI #3-48x3/16" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #3-48x3/16" Thread: UNC Grade: Class 12.9 for reliable...
    $0.65
    $0.65
  • BBI - #2-56x1/2" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11023
    BBI - #2-56x1/2" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11023
    BBI - #2-56x1/2" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11023This BBI #2-56x1/2" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #2-56x1/2" Thread: UNC Grade: Class 12.9 for reliable...
    $0.90
    $0.90
  • BBI - #2-56x3/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11021
    BBI - #2-56x3/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11021
    BBI - #2-56x3/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11021This BBI #2-56x3/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #2-56x3/8" Thread: UNC Grade: Class 12.9 for reliable...
    $0.86
    $0.86
  • BBI - #2-56x1/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11019
    BBI - #2-56x1/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11019
    BBI - #2-56x1/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11019This BBI #2-56x1/4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #2-56x1/4" Thread: UNC Grade: Class 12.9 for reliable...
    $0.85
    $0.85
  • BBI - #2-56x3/16" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11017
    BBI - #2-56x3/16" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11017
    BBI - #2-56x3/16" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11017This BBI #2-56x3/16" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #2-56x3/16" Thread: UNC Grade: Class 12.9 for reliable...
    $0.77
    $0.77

Precision Fastening That Delivers

From fabrication tables to engine components, our socket screws deliver tight, high-strength fastening in every rotation. Trust them in builds where clearance, durability, & reliability matter.

► High-torque drive for confident, flush installation

► Ideal for machine tools, robotics & structural assemblies

► Available in corrosion-resistant & black finishes

Frequently Asked Questions

Socket screws allow for high clamping force in tighter spaces with internal drive heads, making them ideal for machine assembly & compact builds.

Absolutely. Their high tensile strength & precision fit make them a go-to fastener for tools, engines, & equipment.

Yes. We offer stainless socket screws for corrosion resistance & outdoor use, along with alloy steel options for heavy-duty strength.

Brands

BBI

BBI
Bremick

Bremick
Champion

Champion
EHI

EHI
Excision

Excision
Hobsons

Hobsons
Rally

Rally