► 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 - 1/4"-28x3/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 11177
    BBI - 1/4"-28x3/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 11177
    BBI - 1/4"-28x3/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 11177This BBI 1/4"-28x3/4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/4"-28x3/4" Thread: UNF Grade: Class 12.9 for reliable...
    $0.90
    $0.90
  • BBI - 1/4"-28x5/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 11175
    BBI - 1/4"-28x5/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 11175
    BBI - 1/4"-28x5/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 11175This BBI 1/4"-28x5/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/4"-28x5/8" Thread: UNF Grade: Class 12.9 for reliable...
    $0.85
    $0.85
  • BBI - 1/4"-28x1/2" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 11173
    BBI - 1/4"-28x1/2" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 11173
    BBI - 1/4"-28x1/2" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 11173This BBI 1/4"-28x1/2" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/4"-28x1/2" Thread: UNF Grade: Class 12.9 for reliable...
    $0.79
    $0.79
  • BBI - 1/4"-28x3/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 11171
    BBI - 1/4"-28x3/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 11171
    BBI - 1/4"-28x3/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 11171This BBI 1/4"-28x3/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/4"-28x3/8" Thread: UNF Grade: Class 12.9 for reliable...
    $0.73
    $0.73
  • BBI - 1/4"-20x3" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11169
    BBI - 1/4"-20x3" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11169
    BBI - 1/4"-20x3" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11169This BBI 1/4"-20x3" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/4"-20x3" Thread: UNC Grade: Class 12.9 for reliable...
    $2.08
    $2.08
  • BBI - 1/4"-20x2 3/4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11167
    BBI - 1/4"-20x2 3/4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11167
    BBI - 1/4"-20x2 3/4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11167This BBI 1/4"-20x2 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/4"-20x2 Thread: UNC Grade: Class 12.9 for...
    $1.43
    $1.43
  • BBI - 1/4"-20x2 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11165
    BBI - 1/4"-20x2 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11165
    BBI - 1/4"-20x2 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11165This BBI 1/4"-20x2 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/4"-20x2 Thread: UNC Grade: Class 12.9 for...
    $1.06
    $1.06
  • BBI - 1/4"-20x2 1/4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11163
    BBI - 1/4"-20x2 1/4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11163
    BBI - 1/4"-20x2 1/4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11163This BBI 1/4"-20x2 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/4"-20x2 Thread: UNC Grade: Class 12.9 for...
    $0.98
    $0.98
  • BBI - 1/4"-20x2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11161
    BBI - 1/4"-20x2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11161
    BBI - 1/4"-20x2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11161This BBI 1/4"-20x2" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/4"-20x2" Thread: UNC Grade: Class 12.9 for reliable...
    $0.87
    $0.87
  • BBI - 1/4"-20x1 3/4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11159
    BBI - 1/4"-20x1 3/4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11159
    BBI - 1/4"-20x1 3/4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11159This BBI 1/4"-20x1 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/4"-20x1 Thread: UNC Grade: Class 12.9 for...
    $0.83
    $0.83
  • BBI - 1/4"-20x1 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11157
    BBI - 1/4"-20x1 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11157
    BBI - 1/4"-20x1 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11157This BBI 1/4"-20x1 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/4"-20x1 Thread: UNC Grade: Class 12.9 for...
    $0.71
    $0.71
  • BBI - 1/4"-20x1 1/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11155
    BBI - 1/4"-20x1 1/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11155
    BBI - 1/4"-20x1 1/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11155This BBI 1/4"-20x1 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/4"-20x1 Thread: UNC Grade: Class 12.9 for...
    $0.55
    $0.55
  • BBI - 1/4"-20x1" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11153
    BBI - 1/4"-20x1" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11153
    BBI - 1/4"-20x1" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11153This BBI 1/4"-20x1" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/4"-20x1" Thread: UNC Grade: Class 12.9 for reliable...
    $0.49
    $0.49
  • BBI - 1/4"-20x7/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11151
    BBI - 1/4"-20x7/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11151
    BBI - 1/4"-20x7/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11151This BBI 1/4"-20x7/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/4"-20x7/8" Thread: UNC Grade: Class 12.9 for reliable...
    $0.49
    $0.49
  • BBI - 1/4"-20x3/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11149
    BBI - 1/4"-20x3/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11149
    BBI - 1/4"-20x3/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11149This BBI 1/4"-20x3/4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/4"-20x3/4" Thread: UNC Grade: Class 12.9 for reliable...
    $0.48
    $0.48
  • BBI - 1/4"-20x5/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11147
    BBI - 1/4"-20x5/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11147
    BBI - 1/4"-20x5/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11147This BBI 1/4"-20x5/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/4"-20x5/8" Thread: UNC Grade: Class 12.9 for reliable...
    $0.47
    $0.47
  • BBI - 1/4"-20x1/2" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11145
    BBI - 1/4"-20x1/2" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11145
    BBI - 1/4"-20x1/2" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11145This BBI 1/4"-20x1/2" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/4"-20x1/2" Thread: UNC Grade: Class 12.9 for reliable...
    $0.45
    $0.45
  • BBI - 1/4"-20x3/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11143
    BBI - 1/4"-20x3/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11143
    BBI - 1/4"-20x3/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11143This BBI 1/4"-20x3/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/4"-20x3/8" Thread: UNC Grade: Class 12.9 for reliable...
    $0.43
    $0.43
  • BBI - #10-32x2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 11139
    BBI - #10-32x2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 11139
    BBI - #10-32x2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 11139This BBI #10-32x2" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #10-32x2" Thread: UNF Grade: Class 12.9 for reliable...
    $0.83
    $0.83
  • BBI - #10-32x1 3/4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 11137
    BBI - #10-32x1 3/4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 11137
    BBI - #10-32x1 3/4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 11137This BBI #10-32x1 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #10-32x1 Thread: UNF Grade: Class 12.9 for...
    $0.79
    $0.79

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