► 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 - 1/2"-13x3/4" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14136
    BBI - 1/2"-13x3/4" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14136
    BBI - 1/2"-13x3/4" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14136This BBI 1/2"-13x3/4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/2"-13x3/4" Thread: UNC Grade: Grade 316 for reliable strength Finish:...
    $6.39
    $6.39
  • BBI - 3/8"-16x2 1/2" (Pt) - Imperial 316 Socket Head Cap Screw UNC | 14134
    BBI - 3/8"-16x2 1/2" (Pt) - Imperial 316 Socket Head Cap Screw UNC | 14134
    BBI - 3/8"-16x2 1/2" (Pt) - Imperial 316 Socket Head Cap Screw UNC | 14134This BBI 3/8"-16x2 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 3/8"-16x2 Thread: UNC Grade: Grade 316 for reliable strength...
    $6.11
    $6.11
  • BBI - 3/8"-16x2" (Pt) - Imperial 316 Socket Head Cap Screw UNC | 14133
    BBI - 3/8"-16x2" (Pt) - Imperial 316 Socket Head Cap Screw UNC | 14133
    BBI - 3/8"-16x2" (Pt) - Imperial 316 Socket Head Cap Screw UNC | 14133This BBI 3/8"-16x2" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 3/8"-16x2" Thread: UNC Grade: Grade 316 for reliable strength Finish:...
    $4.52
    $4.52
  • BBI - 3/8"-16x1 3/4" (Pt) - Imperial 316 Socket Head Cap Screw UNC | 14132
    BBI - 3/8"-16x1 3/4" (Pt) - Imperial 316 Socket Head Cap Screw UNC | 14132
    BBI - 3/8"-16x1 3/4" (Pt) - Imperial 316 Socket Head Cap Screw UNC | 14132This BBI 3/8"-16x1 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 3/8"-16x1 Thread: UNC Grade: Grade 316 for reliable strength...
    $3.78
    $3.78
  • BBI - 3/8"-16x1 1/2" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14131
    BBI - 3/8"-16x1 1/2" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14131
    BBI - 3/8"-16x1 1/2" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14131This BBI 3/8"-16x1 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 3/8"-16x1 Thread: UNC Grade: Grade 316 for reliable strength...
    $3.41
    $3.41
  • BBI - 3/8"-16x1 1/4" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14130
    BBI - 3/8"-16x1 1/4" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14130
    BBI - 3/8"-16x1 1/4" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14130This BBI 3/8"-16x1 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 3/8"-16x1 Thread: UNC Grade: Grade 316 for reliable strength...
    $3.01
    $3.01
  • BBI - 3/8"-16x1" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14129
    BBI - 3/8"-16x1" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14129
    BBI - 3/8"-16x1" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14129This BBI 3/8"-16x1" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 3/8"-16x1" Thread: UNC Grade: Grade 316 for reliable strength Finish:...
    $2.85
    $2.85
  • BBI - 3/8"-16x3/4" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14128
    BBI - 3/8"-16x3/4" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14128
    BBI - 3/8"-16x3/4" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14128This BBI 3/8"-16x3/4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 3/8"-16x3/4" Thread: UNC Grade: Grade 316 for reliable strength Finish:...
    $2.81
    $2.81
  • BBI - 3/8"-16x5/8" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14127
    BBI - 3/8"-16x5/8" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14127
    BBI - 3/8"-16x5/8" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14127This BBI 3/8"-16x5/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 3/8"-16x5/8" Thread: UNC Grade: Grade 316 for reliable strength Finish:...
    $2.65
    $2.65
  • BBI - 3/8"-16x1/2" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14126
    BBI - 3/8"-16x1/2" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14126
    BBI - 3/8"-16x1/2" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14126This BBI 3/8"-16x1/2" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 3/8"-16x1/2" Thread: UNC Grade: Grade 316 for reliable strength Finish:...
    $2.60
    $2.60
  • BBI - 5/16"-18x2 1/2" (Pt) - Imperial 316 Socket Head Cap Screw UNC | 14124
    BBI - 5/16"-18x2 1/2" (Pt) - Imperial 316 Socket Head Cap Screw UNC | 14124
    BBI - 5/16"-18x2 1/2" (Pt) - Imperial 316 Socket Head Cap Screw UNC | 14124This BBI 5/16"-18x2 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 5/16"-18x2 Thread: UNC Grade: Grade 316 for reliable strength...
    $4.47
    $4.47
  • BBI - 5/16"-18x2" (Pt) - Imperial 316 Socket Head Cap Screw UNC | 14123
    BBI - 5/16"-18x2" (Pt) - Imperial 316 Socket Head Cap Screw UNC | 14123
    BBI - 5/16"-18x2" (Pt) - Imperial 316 Socket Head Cap Screw UNC | 14123This BBI 5/16"-18x2" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 5/16"-18x2" Thread: UNC Grade: Grade 316 for reliable strength Finish:...
    $4.45
    $4.45
  • BBI - 5/16"-18x1 3/4" (Pt) - Imperial 316 Socket Head Cap Screw UNC | 14122
    BBI - 5/16"-18x1 3/4" (Pt) - Imperial 316 Socket Head Cap Screw UNC | 14122
    BBI - 5/16"-18x1 3/4" (Pt) - Imperial 316 Socket Head Cap Screw UNC | 14122This BBI 5/16"-18x1 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 5/16"-18x1 Thread: UNC Grade: Grade 316 for reliable strength...
    $2.53
    $2.53
  • BBI - 5/16"-18x1 1/2" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14121
    BBI - 5/16"-18x1 1/2" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14121
    BBI - 5/16"-18x1 1/2" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14121This BBI 5/16"-18x1 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 5/16"-18x1 Thread: UNC Grade: Grade 316 for reliable strength...
    $2.45
    $2.45
  • BBI - 5/16"-18x1 1/4" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14120
    BBI - 5/16"-18x1 1/4" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14120
    BBI - 5/16"-18x1 1/4" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14120This BBI 5/16"-18x1 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 5/16"-18x1 Thread: UNC Grade: Grade 316 for reliable strength...
    $2.02
    $2.02
  • BBI - 5/16"-18x1" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14119
    BBI - 5/16"-18x1" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14119
    BBI - 5/16"-18x1" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14119This BBI 5/16"-18x1" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 5/16"-18x1" Thread: UNC Grade: Grade 316 for reliable strength Finish:...
    $1.90
    $1.90
  • BBI - 5/16"-18x7/8" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14118
    BBI - 5/16"-18x7/8" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14118
    BBI - 5/16"-18x7/8" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14118This BBI 5/16"-18x7/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 5/16"-18x7/8" Thread: UNC Grade: Grade 316 for reliable strength Finish:...
    $1.90
    $1.90
  • BBI - 5/16"-18x3/4" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14117
    BBI - 5/16"-18x3/4" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14117
    BBI - 5/16"-18x3/4" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14117This BBI 5/16"-18x3/4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 5/16"-18x3/4" Thread: UNC Grade: Grade 316 for reliable strength Finish:...
    $1.81
    $1.81
  • BBI - 5/16"-18x5/8" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14116
    BBI - 5/16"-18x5/8" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14116
    BBI - 5/16"-18x5/8" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14116This BBI 5/16"-18x5/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 5/16"-18x5/8" Thread: UNC Grade: Grade 316 for reliable strength Finish:...
    $1.66
    $1.66
  • BBI - 5/16"-18x1/2" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14115
    BBI - 5/16"-18x1/2" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14115
    BBI - 5/16"-18x1/2" (Ft) - Imperial 316 Socket Head Cap Screw UNC | 14115This BBI 5/16"-18x1/2" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 5/16"-18x1/2" Thread: UNC Grade: Grade 316 for reliable strength Finish:...
    $1.64
    $1.64

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