► 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 - 5/16"-24x1 1/2" - Imperial 304 Button Socket Screw UNF | 702218
    BBI - 5/16"-24x1 1/2" - Imperial 304 Button Socket Screw UNF | 702218
    BBI - 5/16"-24x1 1/2" - Imperial 304 Button Socket Screw UNF | 702218This BBI 5/16"-24x1 is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 5/16"-24x1 Thread: UNF Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for...
    $4.45
    $4.45
  • BBI - 5/16"-24x1" - Imperial 304 Button Socket Screw UNF | 702217
    BBI - 5/16"-24x1" - Imperial 304 Button Socket Screw UNF | 702217
    BBI - 5/16"-24x1" - Imperial 304 Button Socket Screw UNF | 702217This BBI 5/16"-24x1" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 5/16"-24x1" Thread: UNF Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for corrosion...
    $1.86
    $1.86
  • BBI - 5/16"-24x3/4" - Imperial 304 Button Socket Screw UNF | 702214
    BBI - 5/16"-24x3/4" - Imperial 304 Button Socket Screw UNF | 702214
    BBI - 5/16"-24x3/4" - Imperial 304 Button Socket Screw UNF | 702214This BBI 5/16"-24x3/4" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 5/16"-24x3/4" Thread: UNF Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for corrosion...
    $2.86
    $2.86
  • BBI - 5/16"-18x3" - Imperial 304 Button Socket Screw UNC | 702204
    BBI - 5/16"-18x3" - Imperial 304 Button Socket Screw UNC | 702204
    BBI - 5/16"-18x3" - Imperial 304 Button Socket Screw UNC | 702204This BBI 5/16"-18x3" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 5/16"-18x3" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for corrosion...
    $7.78
    $7.78
  • BBI - 5/16"-18x2 1/2" - Imperial 304 Button Socket Screw UNC | 702203
    BBI - 5/16"-18x2 1/2" - Imperial 304 Button Socket Screw UNC | 702203
    BBI - 5/16"-18x2 1/2" - Imperial 304 Button Socket Screw UNC | 702203This BBI 5/16"-18x2 is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 5/16"-18x2 Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for...
    $5.29
    $5.29
  • BBI - 5/16"-18x2" - Imperial 304 Button Socket Screw UNC | 702202
    BBI - 5/16"-18x2" - Imperial 304 Button Socket Screw UNC | 702202
    BBI - 5/16"-18x2" - Imperial 304 Button Socket Screw UNC | 702202This BBI 5/16"-18x2" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 5/16"-18x2" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for corrosion...
    $1.85
    $1.85
  • BBI - 5/16"-18x1 3/4" - Imperial 304 Button Socket Screw UNC | 702199
    BBI - 5/16"-18x1 3/4" - Imperial 304 Button Socket Screw UNC | 702199
    BBI - 5/16"-18x1 3/4" - Imperial 304 Button Socket Screw UNC | 702199This 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...
    $2.69
    $2.69
  • BBI - 5/16"-18x1 1/2" - Imperial 304 Button Socket Screw UNC | 702196
    BBI - 5/16"-18x1 1/2" - Imperial 304 Button Socket Screw UNC | 702196
    BBI - 5/16"-18x1 1/2" - Imperial 304 Button Socket Screw UNC | 702196This 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...
    $1.35
    $1.35
  • BBI - 5/16"-18x1 1/4" - Imperial 304 Button Socket Screw UNC | 702193
    BBI - 5/16"-18x1 1/4" - Imperial 304 Button Socket Screw UNC | 702193
    BBI - 5/16"-18x1 1/4" - Imperial 304 Button Socket Screw UNC | 702193This 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...
    $1.19
    $1.19
  • BBI - 1/4"-28x2" - Imperial 304 Button Socket Screw UNF | 702186
    BBI - 1/4"-28x2" - Imperial 304 Button Socket Screw UNF | 702186
    BBI - 1/4"-28x2" - Imperial 304 Button Socket Screw UNF | 702186This BBI 1/4"-28x2" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 1/4"-28x2" Thread: UNF Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for corrosion...
    $3.23
    $3.23
  • BBI - 1/4"-28x1 1/4" - Imperial 304 Button Socket Screw UNF | 702185
    BBI - 1/4"-28x1 1/4" - Imperial 304 Button Socket Screw UNF | 702185
    BBI - 1/4"-28x1 1/4" - Imperial 304 Button Socket Screw UNF | 702185This BBI 1/4"-28x1 is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 1/4"-28x1 Thread: UNF Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for...
    $2.86
    $2.86
  • BBI - 1/4"-28x1" - Imperial 304 Button Socket Screw UNF | 702184
    BBI - 1/4"-28x1" - Imperial 304 Button Socket Screw UNF | 702184
    BBI - 1/4"-28x1" - Imperial 304 Button Socket Screw UNF | 702184This BBI 1/4"-28x1" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 1/4"-28x1" Thread: UNF Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for corrosion...
    $2.33
    $2.33
  • BBI - 1/4"-28x3/4" - Imperial 304 Button Socket Screw UNF | 702178
    BBI - 1/4"-28x3/4" - Imperial 304 Button Socket Screw UNF | 702178
    BBI - 1/4"-28x3/4" - Imperial 304 Button Socket Screw UNF | 702178This BBI 1/4"-28x3/4" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 1/4"-28x3/4" Thread: UNF Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for corrosion...
    $1.36
    $1.36
  • BBI - 1/4"-28x5/8" - Imperial 304 Button Socket Screw UNF | 702175
    BBI - 1/4"-28x5/8" - Imperial 304 Button Socket Screw UNF | 702175
    BBI - 1/4"-28x5/8" - Imperial 304 Button Socket Screw UNF | 702175This BBI 1/4"-28x5/8" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 1/4"-28x5/8" Thread: UNF Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for corrosion...
    $1.69
    $1.69
  • BBI - 1/4"-28x1/2" - Imperial 304 Button Socket Screw UNF | 702172
    BBI - 1/4"-28x1/2" - Imperial 304 Button Socket Screw UNF | 702172
    BBI - 1/4"-28x1/2" - Imperial 304 Button Socket Screw UNF | 702172This BBI 1/4"-28x1/2" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 1/4"-28x1/2" Thread: UNF Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for corrosion...
    $1.03
    $1.03
  • BBI - 1/4"-20x3" - Imperial 304 Button Socket Screw UNC | 702170
    BBI - 1/4"-20x3" - Imperial 304 Button Socket Screw UNC | 702170
    BBI - 1/4"-20x3" - Imperial 304 Button Socket Screw UNC | 702170This BBI 1/4"-20x3" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 1/4"-20x3" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for corrosion...
    $6.50
    $6.50
  • BBI - 1/4"-28x3/8" - Imperial 304 Button Socket Screw UNF | 702169
    BBI - 1/4"-28x3/8" - Imperial 304 Button Socket Screw UNF | 702169
    BBI - 1/4"-28x3/8" - Imperial 304 Button Socket Screw UNF | 702169This BBI 1/4"-28x3/8" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 1/4"-28x3/8" Thread: UNF Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for corrosion...
    $1.48
    $1.48
  • BBI - 1/4"-20x2 1/2" - Imperial 304 Button Socket Screw UNC | 702168
    BBI - 1/4"-20x2 1/2" - Imperial 304 Button Socket Screw UNC | 702168
    BBI - 1/4"-20x2 1/2" - Imperial 304 Button Socket Screw UNC | 702168This BBI 1/4"-20x2 is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 1/4"-20x2 Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for...
    $4.36
    $4.36
  • BBI - 1/4"-20x2" - Imperial 304 Button Socket Screw UNC | 702166
    BBI - 1/4"-20x2" - Imperial 304 Button Socket Screw UNC | 702166
    BBI - 1/4"-20x2" - Imperial 304 Button Socket Screw UNC | 702166This BBI 1/4"-20x2" is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 1/4"-20x2" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for corrosion...
    $1.25
    $1.25
  • BBI - 1/4"-20x1 3/4" - Imperial 304 Button Socket Screw UNC | 702163
    BBI - 1/4"-20x1 3/4" - Imperial 304 Button Socket Screw UNC | 702163
    BBI - 1/4"-20x1 3/4" - Imperial 304 Button Socket Screw UNC | 702163This BBI 1/4"-20x1 is a low-profile button head socket screw driven with an Allen key.► Key Features Size: 1/4"-20x1 Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel for...
    $1.73
    $1.73

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