► 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 - 9/16"-12x2 3/4" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581620
    BBI - 9/16"-12x2 3/4" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581620
    BBI - 9/16"-12x2 3/4" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581620This BBI 9/16"-12x2 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 9/16"-12x2 Thread: UNC Grade: Class 12.9 for reliable...
    $18.45
    $18.45
  • BBI - 9/16"-12x2 1/2" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581619
    BBI - 9/16"-12x2 1/2" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581619
    BBI - 9/16"-12x2 1/2" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581619This BBI 9/16"-12x2 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 9/16"-12x2 Thread: UNC Grade: Class 12.9 for reliable...
    $15.87
    $15.87
  • BBI - 9/16"-12x2 1/4" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581617
    BBI - 9/16"-12x2 1/4" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581617
    BBI - 9/16"-12x2 1/4" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581617This BBI 9/16"-12x2 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 9/16"-12x2 Thread: UNC Grade: Class 12.9 for reliable...
    $14.91
    $14.91
  • BBI - 9/16"-12x2" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581615
    BBI - 9/16"-12x2" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581615
    BBI - 9/16"-12x2" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581615This BBI 9/16"-12x2" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 9/16"-12x2" Thread: UNC Grade: Class 12.9 for reliable strength...
    $14.73
    $14.73
  • BBI - 9/16"-12x1 3/4" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581613
    BBI - 9/16"-12x1 3/4" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581613
    BBI - 9/16"-12x1 3/4" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581613This BBI 9/16"-12x1 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 9/16"-12x1 Thread: UNC Grade: Class 12.9 for reliable...
    $14.27
    $14.27
  • BBI - 9/16"-12x1 1/2" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581611
    BBI - 9/16"-12x1 1/2" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581611
    BBI - 9/16"-12x1 1/2" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581611This BBI 9/16"-12x1 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 9/16"-12x1 Thread: UNC Grade: Class 12.9 for reliable...
    $12.76
    $12.76
  • BBI - 9/16"-12x1 1/4" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581609
    BBI - 9/16"-12x1 1/4" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581609
    BBI - 9/16"-12x1 1/4" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581609This BBI 9/16"-12x1 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 9/16"-12x1 Thread: UNC Grade: Class 12.9 for reliable...
    $11.30
    $11.30
  • BBI - 9/16"-12x1" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581607
    BBI - 9/16"-12x1" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581607
    BBI - 9/16"-12x1" - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581607This BBI 9/16"-12x1" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 9/16"-12x1" Thread: UNC Grade: Class 12.9 for reliable strength...
    $9.58
    $9.58
  • BBI - 5/8"-11x1 1/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581603
    BBI - 5/8"-11x1 1/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581603
    BBI - 5/8"-11x1 1/8" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 581603This BBI 5/8"-11x1 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 5/8"-11x1 Thread: UNC Grade: Class 12.9 for...
    $7.36
    $7.36
  • BBI - 1/2"-20x8" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581602
    BBI - 1/2"-20x8" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581602
    BBI - 1/2"-20x8" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581602This BBI 1/2"-20x8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/2"-20x8" Thread: UNF Grade: Class 12.9 for reliable...
    $29.25
    $29.25
  • BBI - 1/2"-20x7" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581600
    BBI - 1/2"-20x7" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581600
    BBI - 1/2"-20x7" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581600This BBI 1/2"-20x7" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/2"-20x7" Thread: UNF Grade: Class 12.9 for reliable...
    $20.90
    $20.90
  • BBI - 1/2"-20x6 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581599
    BBI - 1/2"-20x6 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581599
    BBI - 1/2"-20x6 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581599This BBI 1/2"-20x6 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/2"-20x6 Thread: UNF Grade: Class 12.9 for...
    $42.65
    $42.65
  • BBI - 1/2"-20x6" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581598
    BBI - 1/2"-20x6" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581598
    BBI - 1/2"-20x6" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581598This BBI 1/2"-20x6" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/2"-20x6" Thread: UNF Grade: Class 12.9 for reliable...
    $18.81
    $18.81
  • BBI - 1/2"-20x5 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581596
    BBI - 1/2"-20x5 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581596
    BBI - 1/2"-20x5 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581596This BBI 1/2"-20x5 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/2"-20x5 Thread: UNF Grade: Class 12.9 for...
    $16.72
    $16.72
  • BBI - 1/2"-20x5" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581594
    BBI - 1/2"-20x5" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581594
    BBI - 1/2"-20x5" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581594This BBI 1/2"-20x5" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/2"-20x5" Thread: UNF Grade: Class 12.9 for reliable...
    $10.03
    $10.03
  • BBI - 1/2"-20x4 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581592
    BBI - 1/2"-20x4 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581592
    BBI - 1/2"-20x4 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581592This BBI 1/2"-20x4 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/2"-20x4 Thread: UNF Grade: Class 12.9 for...
    $7.94
    $7.94
  • BBI - 1/2"-20x4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581590
    BBI - 1/2"-20x4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581590
    BBI - 1/2"-20x4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581590This BBI 1/2"-20x4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/2"-20x4" Thread: UNF Grade: Class 12.9 for reliable...
    $7.52
    $7.52
  • BBI - 1/2"-20x3 3/4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581589
    BBI - 1/2"-20x3 3/4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581589
    BBI - 1/2"-20x3 3/4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581589This BBI 1/2"-20x3 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/2"-20x3 Thread: UNF Grade: Class 12.9 for...
    $12.20
    $12.20
  • BBI - 1/2"-20x3 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581588
    BBI - 1/2"-20x3 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581588
    BBI - 1/2"-20x3 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581588This BBI 1/2"-20x3 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/2"-20x3 Thread: UNF Grade: Class 12.9 for...
    $5.81
    $5.81
  • BBI - 1/2"-20x3 1/4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581586
    BBI - 1/2"-20x3 1/4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581586
    BBI - 1/2"-20x3 1/4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNF | 581586This BBI 1/2"-20x3 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/2"-20x3 Thread: UNF Grade: Class 12.9 for...
    $7.10
    $7.10

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