► 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 - #6-32x1/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212022
    BBI - #6-32x1/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212022
    BBI - #6-32x1/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212022This BBI #6-32x1/4" is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: #6-32x1/4" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel...
    $0.34
    $0.34
  • BBI - #4-40x1/2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212019
    BBI - #4-40x1/2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212019
    BBI - #4-40x1/2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212019This BBI #4-40x1/2" is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: #4-40x1/2" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel...
    $0.54
    $0.54
  • BBI - #4-40x3/8" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212018
    BBI - #4-40x3/8" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212018
    BBI - #4-40x3/8" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212018This BBI #4-40x3/8" is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: #4-40x3/8" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel...
    $0.41
    $0.41
  • BBI - #4-40x1/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212017
    BBI - #4-40x1/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212017
    BBI - #4-40x1/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212017This BBI #4-40x1/4" is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: #4-40x1/4" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel...
    $0.18
    $0.18
  • BBI - 5/16"-18x7/8" (Ft) - Imperial 304 Button Socket Screw UNC | 202141
    BBI - 5/16"-18x7/8" (Ft) - Imperial 304 Button Socket Screw UNC | 202141
    BBI - 5/16"-18x7/8" (Ft) - Imperial 304 Button Socket Screw UNC | 202141This BBI 5/16"-18x7/8" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 5/16"-18x7/8" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for...
    $1.60
    $1.60
  • BBI - 1/4"-20x7/8" (Ft) - Imperial 304 Button Socket Screw UNC | 202131
    BBI - 1/4"-20x7/8" (Ft) - Imperial 304 Button Socket Screw UNC | 202131
    BBI - 1/4"-20x7/8" (Ft) - Imperial 304 Button Socket Screw UNC | 202131This BBI 1/4"-20x7/8" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 1/4"-20x7/8" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for...
    $0.96
    $0.96
  • BBI - #10-32x7/8" (Ft) - Imperial 304 Button Socket Screw UNF | 202129
    BBI - #10-32x7/8" (Ft) - Imperial 304 Button Socket Screw UNF | 202129
    BBI - #10-32x7/8" (Ft) - Imperial 304 Button Socket Screw UNF | 202129This BBI #10-32x7/8" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: #10-32x7/8" Thread: UNF Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for...
    $1.11
    $1.11
  • BBI - #10-24x7/8" (Ft) - Imperial 304 Button Socket Screw UNC | 202127
    BBI - #10-24x7/8" (Ft) - Imperial 304 Button Socket Screw UNC | 202127
    BBI - #10-24x7/8" (Ft) - Imperial 304 Button Socket Screw UNC | 202127This BBI #10-24x7/8" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: #10-24x7/8" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for...
    $0.82
    $0.82
  • BBI - 1/2"-13x1 1/2" (Ft) - Imperial 304 Button Socket Screw UNC | 202118
    BBI - 1/2"-13x1 1/2" (Ft) - Imperial 304 Button Socket Screw UNC | 202118
    BBI - 1/2"-13x1 1/2" (Ft) - Imperial 304 Button Socket Screw UNC | 202118This BBI 1/2"-13x1 is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 1/2"-13x1 Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel...
    $9.19
    $9.19
  • BBI - 1/2"-13x1 1/4" (Ft) - Imperial 304 Button Socket Screw UNC | 202117
    BBI - 1/2"-13x1 1/4" (Ft) - Imperial 304 Button Socket Screw UNC | 202117
    BBI - 1/2"-13x1 1/4" (Ft) - Imperial 304 Button Socket Screw UNC | 202117This BBI 1/2"-13x1 is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 1/2"-13x1 Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel...
    $8.23
    $8.23
  • BBI - 1/2"-13x1" (Ft) - Imperial 304 Button Socket Screw UNC | 202116
    BBI - 1/2"-13x1" (Ft) - Imperial 304 Button Socket Screw UNC | 202116
    BBI - 1/2"-13x1" (Ft) - Imperial 304 Button Socket Screw UNC | 202116This BBI 1/2"-13x1" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 1/2"-13x1" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for...
    $6.73
    $6.73
  • BBI - 3/8"-16x1 1/2" (Ft) - Imperial 304 Button Socket Screw UNC | 202114
    BBI - 3/8"-16x1 1/2" (Ft) - Imperial 304 Button Socket Screw UNC | 202114
    BBI - 3/8"-16x1 1/2" (Ft) - Imperial 304 Button Socket Screw UNC | 202114This BBI 3/8"-16x1 is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 3/8"-16x1 Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel...
    $3.06
    $3.06
  • BBI - 1/2"-13x3/4" (Ft) - Imperial 304 Button Socket Screw UNC | 202113
    BBI - 1/2"-13x3/4" (Ft) - Imperial 304 Button Socket Screw UNC | 202113
    BBI - 1/2"-13x3/4" (Ft) - Imperial 304 Button Socket Screw UNC | 202113This BBI 1/2"-13x3/4" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 1/2"-13x3/4" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for...
    $6.37
    $6.37
  • BBI - 3/8"-16x1 1/4" (Ft) - Imperial 304 Button Socket Screw UNC | 202112
    BBI - 3/8"-16x1 1/4" (Ft) - Imperial 304 Button Socket Screw UNC | 202112
    BBI - 3/8"-16x1 1/4" (Ft) - Imperial 304 Button Socket Screw UNC | 202112This BBI 3/8"-16x1 is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 3/8"-16x1 Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel...
    $2.70
    $2.70
  • BBI - 3/8"-16x1" (Ft) - Imperial 304 Button Socket Screw UNC | 202109
    BBI - 3/8"-16x1" (Ft) - Imperial 304 Button Socket Screw UNC | 202109
    BBI - 3/8"-16x1" (Ft) - Imperial 304 Button Socket Screw UNC | 202109This BBI 3/8"-16x1" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 3/8"-16x1" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for...
    $1.67
    $1.67
  • BBI - 3/8"-16x3/4" (Ft) - Imperial 304 Button Socket Screw UNC | 202103
    BBI - 3/8"-16x3/4" (Ft) - Imperial 304 Button Socket Screw UNC | 202103
    BBI - 3/8"-16x3/4" (Ft) - Imperial 304 Button Socket Screw UNC | 202103This BBI 3/8"-16x3/4" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 3/8"-16x3/4" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for...
    $1.50
    $1.50
  • BBI - 5/16"-18x1" (Ft) - Imperial 304 Button Socket Screw UNC | 202094
    BBI - 5/16"-18x1" (Ft) - Imperial 304 Button Socket Screw UNC | 202094
    BBI - 5/16"-18x1" (Ft) - Imperial 304 Button Socket Screw UNC | 202094This BBI 5/16"-18x1" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 5/16"-18x1" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for...
    $1.25
    $1.25
  • BBI - 5/16"-18x3/4" (Ft) - Imperial 304 Button Socket Screw UNC | 202088
    BBI - 5/16"-18x3/4" (Ft) - Imperial 304 Button Socket Screw UNC | 202088
    BBI - 5/16"-18x3/4" (Ft) - Imperial 304 Button Socket Screw UNC | 202088This BBI 5/16"-18x3/4" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 5/16"-18x3/4" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for...
    $1.20
    $1.20
  • BBI - 5/16"-18x5/8" (Ft) - Imperial 304 Button Socket Screw UNC | 202085
    BBI - 5/16"-18x5/8" (Ft) - Imperial 304 Button Socket Screw UNC | 202085
    BBI - 5/16"-18x5/8" (Ft) - Imperial 304 Button Socket Screw UNC | 202085This BBI 5/16"-18x5/8" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 5/16"-18x5/8" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for...
    $1.11
    $1.11
  • BBI - 5/16"-18x1/2" (Ft) - Imperial 304 Button Socket Screw UNC | 202082
    BBI - 5/16"-18x1/2" (Ft) - Imperial 304 Button Socket Screw UNC | 202082
    BBI - 5/16"-18x1/2" (Ft) - Imperial 304 Button Socket Screw UNC | 202082This BBI 5/16"-18x1/2" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 5/16"-18x1/2" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for...
    $1.38
    $1.38

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