► 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 - #4-40x1/4" (Ft) - Imperial 304 Socket Head Cap Screw UNC | 12049
    BBI - #4-40x1/4" (Ft) - Imperial 304 Socket Head Cap Screw UNC | 12049
    BBI - #4-40x1/4" (Ft) - Imperial 304 Socket Head Cap Screw UNC | 12049This 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: Grade 304 for reliable strength Finish:...
    $0.44
    $0.44
  • BBI - #3-48x1/2" (Ft) - Imperial 304 Socket Head Cap Screw UNC | 12046
    BBI - #3-48x1/2" (Ft) - Imperial 304 Socket Head Cap Screw UNC | 12046
    BBI - #3-48x1/2" (Ft) - Imperial 304 Socket Head Cap Screw UNC | 12046This 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: Grade 304 for reliable strength Finish:...
    $0.83
    $0.83
  • BBI - #3-48x3/8" (Ft) - Imperial 304 Socket Head Cap Screw UNC | 12043
    BBI - #3-48x3/8" (Ft) - Imperial 304 Socket Head Cap Screw UNC | 12043
    BBI - #3-48x3/8" (Ft) - Imperial 304 Socket Head Cap Screw UNC | 12043This 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: Grade 304 for reliable strength Finish:...
    $0.82
    $0.82
  • BBI - #3-48x3/16" (Ft) - Imperial 304 Socket Head Cap Screw UNC | 12037
    BBI - #3-48x3/16" (Ft) - Imperial 304 Socket Head Cap Screw UNC | 12037
    BBI - #3-48x3/16" (Ft) - Imperial 304 Socket Head Cap Screw UNC | 12037This 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: Grade 304 for reliable strength Finish:...
    $0.78
    $0.78
  • BBI - #2-56x1/2" (Ft) - Imperial 304 Socket Head Cap Screw UNC | 12034
    BBI - #2-56x1/2" (Ft) - Imperial 304 Socket Head Cap Screw UNC | 12034
    BBI - #2-56x1/2" (Ft) - Imperial 304 Socket Head Cap Screw UNC | 12034This 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: Grade 304 for reliable strength Finish:...
    $1.01
    $1.01
  • BBI - #2-56x1/4" (Ft) - Imperial 304 Socket Head Cap Screw UNC | 12028
    BBI - #2-56x1/4" (Ft) - Imperial 304 Socket Head Cap Screw UNC | 12028
    BBI - #2-56x1/4" (Ft) - Imperial 304 Socket Head Cap Screw UNC | 12028This 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: Grade 304 for reliable strength Finish:...
    $0.63
    $0.63
  • BBI - #1-72x3/8" (Ft) - Imperial 304 Socket Head Cap Screw UNF | 12022
    BBI - #1-72x3/8" (Ft) - Imperial 304 Socket Head Cap Screw UNF | 12022
    BBI - #1-72x3/8" (Ft) - Imperial 304 Socket Head Cap Screw UNF | 12022This BBI #1-72x3/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #1-72x3/8" Thread: UNF Grade: Grade 304 for reliable strength Finish:...
    $1.26
    $1.26
  • BBI - #1-72x1/4" (Ft) - Imperial 304 Socket Head Cap Screw UNF | 12019
    BBI - #1-72x1/4" (Ft) - Imperial 304 Socket Head Cap Screw UNF | 12019
    BBI - #1-72x1/4" (Ft) - Imperial 304 Socket Head Cap Screw UNF | 12019This BBI #1-72x1/4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #1-72x1/4" Thread: UNF Grade: Grade 304 for reliable strength Finish:...
    $1.07
    $1.07
  • BBI - #0-80x1/4" (Ft) - Imperial 304 Socket Head Cap Screw UNF | 12007
    BBI - #0-80x1/4" (Ft) - Imperial 304 Socket Head Cap Screw UNF | 12007
    BBI - #0-80x1/4" (Ft) - Imperial 304 Socket Head Cap Screw UNF | 12007This BBI #0-80x1/4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #0-80x1/4" Thread: UNF Grade: Grade 304 for reliable strength Finish:...
    $0.89
    $0.89
  • BBI - #0-80x3/16" (Ft) - Imperial 304 Socket Head Cap Screw UNF | 12004
    BBI - #0-80x3/16" (Ft) - Imperial 304 Socket Head Cap Screw UNF | 12004
    BBI - #0-80x3/16" (Ft) - Imperial 304 Socket Head Cap Screw UNF | 12004This BBI #0-80x3/16" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #0-80x3/16" Thread: UNF Grade: Grade 304 for reliable strength Finish:...
    $0.86
    $0.86
  • BBI - 2 1/2"-4x9" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11737
    BBI - 2 1/2"-4x9" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11737
    BBI - 2 1/2"-4x9" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11737This BBI 1/2"-4x9" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/2"-4x9" Thread: UNC Grade: Class 12.9 for...
    $1,618.17
    $1,618.17
  • BBI - 1/4"-20x4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11613
    BBI - 1/4"-20x4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11613
    BBI - 1/4"-20x4" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11613This BBI 1/4"-20x4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/4"-20x4" Thread: UNC Grade: Class 12.9 for reliable...
    $3.77
    $3.77
  • BBI - 1/4"-20x3 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11611
    BBI - 1/4"-20x3 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11611
    BBI - 1/4"-20x3 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11611This 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...
    $3.11
    $3.11
  • BBI - 1 1/2"-6x12" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11607
    BBI - 1 1/2"-6x12" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11607
    BBI - 1 1/2"-6x12" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11607This BBI 1/2"-6x12" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/2"-6x12" Thread: UNC Grade: Class 12.9 for...
    $456.47
    $456.47
  • BBI - 1 1/2"-6x10" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11605
    BBI - 1 1/2"-6x10" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11605
    BBI - 1 1/2"-6x10" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11605This BBI 1/2"-6x10" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/2"-6x10" Thread: UNC Grade: Class 12.9 for...
    $277.87
    $277.87
  • BBI - 1 1/2"-6x9" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11603
    BBI - 1 1/2"-6x9" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11603
    BBI - 1 1/2"-6x9" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11603This BBI 1/2"-6x9" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/2"-6x9" Thread: UNC Grade: Class 12.9 for...
    $295.23
    $295.23
  • BBI - 1 1/2"-6x8" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11601
    BBI - 1 1/2"-6x8" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11601
    BBI - 1 1/2"-6x8" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11601This BBI 1/2"-6x8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/2"-6x8" Thread: UNC Grade: Class 12.9 for...
    $275.71
    $275.71
  • BBI - 1 1/2"-6x7" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11599
    BBI - 1 1/2"-6x7" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11599
    BBI - 1 1/2"-6x7" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11599This BBI 1/2"-6x7" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/2"-6x7" Thread: UNC Grade: Class 12.9 for...
    $232.97
    $232.97
  • BBI - 1 1/2"-6x6 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11597
    BBI - 1 1/2"-6x6 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11597
    BBI - 1 1/2"-6x6 1/2" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11597This BBI 1/2"-6x6 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/2"-6x6 Thread: UNC Grade: Class 12.9...
    $216.68
    $216.68
  • BBI - 1 1/2"-6x6" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11595
    BBI - 1 1/2"-6x6" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11595
    BBI - 1 1/2"-6x6" (Pt) - Imperial Socket Head Cap Screw Thermal Black Oxide UNC | 11595This BBI 1/2"-6x6" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/2"-6x6" Thread: UNC Grade: Class 12.9 for...
    $200.53
    $200.53

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