► 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

Sidebar
Filter
  • 10
  • 15
  • 20
  • 25
  • 30
  • 50
  • Featured
  • Most relevant
  • Best selling
  • Alphabetically, A-Z
  • Alphabetically, Z-A
  • Price, low to high
  • Price, high to low
  • Date, old to new
  • Date, new to old
Sort

Sort by:

  • Featured
  • Most relevant
  • Best selling
  • Alphabetically, A-Z
  • Alphabetically, Z-A
  • Price, low to high
  • Price, high to low
  • Date, old to new
  • Date, new to old
  • BBI - #4-40x1/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide (1936 Series) UNC | 307040
    BBI - #4-40x1/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide (1936 Series) UNC | 307040
    BBI - #4-40x1/4" (Ft) - Imperial Socket Head Cap Screw Thermal Black Oxide (1936 Series) UNC | 307040This 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: Class 12.9...
    $0.80
    $0.80
  • BBI - 3/8"-16x1/2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212175
    BBI - 3/8"-16x1/2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212175
    BBI - 3/8"-16x1/2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212175This BBI 3/8"-16x1/2" is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: 3/8"-16x1/2" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel...
    $2.18
    $2.18
  • BBI - #10-24x7/8" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212165
    BBI - #10-24x7/8" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212165
    BBI - #10-24x7/8" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212165This BBI #10-24x7/8" is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: #10-24x7/8" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel...
    $0.69
    $0.69
  • BBI - #8-32x7/8" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212159
    BBI - #8-32x7/8" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212159
    BBI - #8-32x7/8" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212159This BBI #8-32x7/8" is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: #8-32x7/8" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel...
    $0.95
    $0.95
  • BBI - 5/8"-11x3" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212153
    BBI - 5/8"-11x3" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212153
    BBI - 5/8"-11x3" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212153This BBI 5/8"-11x3" is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: 5/8"-11x3" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel...
    $31.12
    $31.12
  • BBI - 5/8"-11x2 1/2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212152
    BBI - 5/8"-11x2 1/2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212152
    BBI - 5/8"-11x2 1/2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212152This BBI 5/8"-11x2 is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: 5/8"-11x2 Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless...
    $30.11
    $30.11
  • BBI - 5/8"-11x2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212151
    BBI - 5/8"-11x2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212151
    BBI - 5/8"-11x2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212151This BBI 5/8"-11x2" is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: 5/8"-11x2" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel...
    $29.11
    $29.11
  • BBI - 5/8"-11x1 1/2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212150
    BBI - 5/8"-11x1 1/2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212150
    BBI - 5/8"-11x1 1/2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212150This BBI 5/8"-11x1 is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: 5/8"-11x1 Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless...
    $35.34
    $35.34
  • BBI - 5/8"-11x1 1/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212149
    BBI - 5/8"-11x1 1/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212149
    BBI - 5/8"-11x1 1/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212149This BBI 5/8"-11x1 is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: 5/8"-11x1 Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless...
    $21.12
    $21.12
  • BBI - 5/8"-11x1" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212148
    BBI - 5/8"-11x1" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212148
    BBI - 5/8"-11x1" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212148This BBI 5/8"-11x1" is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: 5/8"-11x1" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel...
    $19.57
    $19.57
  • BBI - 1/2"-13x2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212146
    BBI - 1/2"-13x2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212146
    BBI - 1/2"-13x2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212146This BBI 1/2"-13x2" is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: 1/2"-13x2" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel...
    $9.84
    $9.84
  • BBI - 1/2"-13x1 3/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212145
    BBI - 1/2"-13x1 3/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212145
    BBI - 1/2"-13x1 3/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212145This BBI 1/2"-13x1 is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: 1/2"-13x1 Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless...
    $8.21
    $8.21
  • BBI - 1/2"-13x1 1/2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212144
    BBI - 1/2"-13x1 1/2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212144
    BBI - 1/2"-13x1 1/2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212144This BBI 1/2"-13x1 is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: 1/2"-13x1 Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless...
    $7.13
    $7.13
  • BBI - 1/2"-13x1 1/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212143
    BBI - 1/2"-13x1 1/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212143
    BBI - 1/2"-13x1 1/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212143This BBI 1/2"-13x1 is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: 1/2"-13x1 Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless...
    $4.64
    $4.64
  • BBI - 1/2"-13x1" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212142
    BBI - 1/2"-13x1" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212142
    BBI - 1/2"-13x1" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212142This BBI 1/2"-13x1" is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: 1/2"-13x1" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel...
    $3.34
    $3.34
  • BBI - 1/2"-13x3/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212141
    BBI - 1/2"-13x3/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212141
    BBI - 1/2"-13x3/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212141This BBI 1/2"-13x3/4" is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: 1/2"-13x3/4" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel...
    $3.22
    $3.22
  • BBI - 3/8"-16x2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212133
    BBI - 3/8"-16x2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212133
    BBI - 3/8"-16x2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212133This BBI 3/8"-16x2" is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: 3/8"-16x2" Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless Steel...
    $3.89
    $3.89
  • BBI - 3/8"-16x1 3/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212130
    BBI - 3/8"-16x1 3/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212130
    BBI - 3/8"-16x1 3/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212130This BBI 3/8"-16x1 is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: 3/8"-16x1 Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless...
    $3.22
    $3.22
  • BBI - 3/8"-16x1 1/2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212127
    BBI - 3/8"-16x1 1/2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212127
    BBI - 3/8"-16x1 1/2" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212127This BBI 3/8"-16x1 is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: 3/8"-16x1 Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless...
    $2.74
    $2.74
  • BBI - 3/8"-16x1 1/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212124
    BBI - 3/8"-16x1 1/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212124
    BBI - 3/8"-16x1 1/4" (Ft) - Imperial 304 Countersunk Socket Screw UNC | 212124This BBI 3/8"-16x1 is a countersunk socket screw that sits flush, driven with an Allen key.► Key Features Size: 3/8"-16x1 Thread: UNC Grade: Grade 304 for reliable strength Finish: 304 Stainless...
    $2.31
    $2.31

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