► 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 - #4-48x3/8" UNF - Imperial 304 Socket Head Cap Screw UNF | 592089
    BBI - #4-48x3/8" UNF - Imperial 304 Socket Head Cap Screw UNF | 592089
    BBI - #4-48x3/8" UNF - Imperial 304 Socket Head Cap Screw UNF | 592089This BBI #4-48x3/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #4-48x3/8" Thread: UNF Grade: Grade 304 for reliable strength Finish:...
    $0.78
    $0.78
  • BBI - #4-48x1/4" UNF - Imperial 304 Socket Head Cap Screw UNF | 592087
    BBI - #4-48x1/4" UNF - Imperial 304 Socket Head Cap Screw UNF | 592087
    BBI - #4-48x1/4" UNF - Imperial 304 Socket Head Cap Screw UNF | 592087This BBI #4-48x1/4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #4-48x1/4" Thread: UNF Grade: Grade 304 for reliable strength Finish:...
    $0.76
    $0.76
  • BBI - #4-40x2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592086
    BBI - #4-40x2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592086
    BBI - #4-40x2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592086This BBI #4-40x2" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #4-40x2" Thread: UNC Grade: Grade 304 for reliable strength Finish:...
    $2.90
    $2.90
  • BBI - #4-48x3/16" UNF - Imperial 304 Socket Head Cap Screw UNF | 592085
    BBI - #4-48x3/16" UNF - Imperial 304 Socket Head Cap Screw UNF | 592085
    BBI - #4-48x3/16" UNF - Imperial 304 Socket Head Cap Screw UNF | 592085This BBI #4-48x3/16" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #4-48x3/16" Thread: UNF Grade: Grade 304 for reliable strength Finish:...
    $0.74
    $0.74
  • BBI - #4-40x1 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592083
    BBI - #4-40x1 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592083
    BBI - #4-40x1 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592083This BBI #4-40x1 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #4-40x1 Thread: UNC Grade: Grade 304 for reliable strength...
    $1.45
    $1.45
  • BBI - #4-40x1 1/4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592081
    BBI - #4-40x1 1/4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592081
    BBI - #4-40x1 1/4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592081This BBI #4-40x1 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #4-40x1 Thread: UNC Grade: Grade 304 for reliable strength...
    $1.61
    $1.61
  • BBI - #10-32x4" UNF - Imperial 304 Socket Head Cap Screw UNF | 592080
    BBI - #10-32x4" UNF - Imperial 304 Socket Head Cap Screw UNF | 592080
    BBI - #10-32x4" UNF - Imperial 304 Socket Head Cap Screw UNF | 592080This BBI #10-32x4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #10-32x4" Thread: UNF Grade: Grade 304 for reliable strength Finish:...
    $5.37
    $5.37
  • BBI - #4-40x1" UNC - Imperial 304 Socket Head Cap Screw UNC | 592079
    BBI - #4-40x1" UNC - Imperial 304 Socket Head Cap Screw UNC | 592079
    BBI - #4-40x1" UNC - Imperial 304 Socket Head Cap Screw UNC | 592079This BBI #4-40x1" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #4-40x1" Thread: UNC Grade: Grade 304 for reliable strength Finish:...
    $0.33
    $0.33
  • BBI - #4-40x7/8" UNC - Imperial 304 Socket Head Cap Screw UNC | 592077
    BBI - #4-40x7/8" UNC - Imperial 304 Socket Head Cap Screw UNC | 592077
    BBI - #4-40x7/8" UNC - Imperial 304 Socket Head Cap Screw UNC | 592077This BBI #4-40x7/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #4-40x7/8" Thread: UNC Grade: Grade 304 for reliable strength Finish:...
    $1.23
    $1.23
  • BBI - #4-40x3/4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592075
    BBI - #4-40x3/4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592075
    BBI - #4-40x3/4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592075This BBI #4-40x3/4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #4-40x3/4" Thread: UNC Grade: Grade 304 for reliable strength Finish:...
    $0.56
    $0.56
  • BBI - #4-40x5/8" UNC - Imperial 304 Socket Head Cap Screw UNC | 592073
    BBI - #4-40x5/8" UNC - Imperial 304 Socket Head Cap Screw UNC | 592073
    BBI - #4-40x5/8" UNC - Imperial 304 Socket Head Cap Screw UNC | 592073This BBI #4-40x5/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #4-40x5/8" Thread: UNC Grade: Grade 304 for reliable strength Finish:...
    $0.59
    $0.59
  • BBI - #4-40x7/16" UNC - Imperial 304 Socket Head Cap Screw UNC | 592071
    BBI - #4-40x7/16" UNC - Imperial 304 Socket Head Cap Screw UNC | 592071
    BBI - #4-40x7/16" UNC - Imperial 304 Socket Head Cap Screw UNC | 592071This BBI #4-40x7/16" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #4-40x7/16" Thread: UNC Grade: Grade 304 for reliable strength Finish:...
    $0.57
    $0.57
  • BBI - #4-40x5/16" UNC - Imperial 304 Socket Head Cap Screw UNC | 592069
    BBI - #4-40x5/16" UNC - Imperial 304 Socket Head Cap Screw UNC | 592069
    BBI - #4-40x5/16" UNC - Imperial 304 Socket Head Cap Screw UNC | 592069This BBI #4-40x5/16" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #4-40x5/16" Thread: UNC Grade: Grade 304 for reliable strength Finish:...
    $0.22
    $0.22
  • BBI - #4-40x3/16" UNC - Imperial 304 Socket Head Cap Screw UNC | 592067
    BBI - #4-40x3/16" UNC - Imperial 304 Socket Head Cap Screw UNC | 592067
    BBI - #4-40x3/16" UNC - Imperial 304 Socket Head Cap Screw UNC | 592067This BBI #4-40x3/16" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #4-40x3/16" Thread: UNC Grade: Grade 304 for reliable strength Finish:...
    $0.45
    $0.45
  • BBI - #4-40x1/8" UNC - Imperial 304 Socket Head Cap Screw UNC | 592065
    BBI - #4-40x1/8" UNC - Imperial 304 Socket Head Cap Screw UNC | 592065
    BBI - #4-40x1/8" UNC - Imperial 304 Socket Head Cap Screw UNC | 592065This BBI #4-40x1/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #4-40x1/8" Thread: UNC Grade: Grade 304 for reliable strength Finish:...
    $0.42
    $0.42
  • BBI - #3-56x1" UNF - Imperial 304 Socket Head Cap Screw UNF | 592064
    BBI - #3-56x1" UNF - Imperial 304 Socket Head Cap Screw UNF | 592064
    BBI - #3-56x1" UNF - Imperial 304 Socket Head Cap Screw UNF | 592064This BBI #3-56x1" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #3-56x1" Thread: UNF Grade: Grade 304 for reliable strength Finish:...
    $3.12
    $3.12
  • BBI - #3-56x3/4" UNF - Imperial 304 Socket Head Cap Screw UNF | 592063
    BBI - #3-56x3/4" UNF - Imperial 304 Socket Head Cap Screw UNF | 592063
    BBI - #3-56x3/4" UNF - Imperial 304 Socket Head Cap Screw UNF | 592063This BBI #3-56x3/4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #3-56x3/4" Thread: UNF Grade: Grade 304 for reliable strength Finish:...
    $2.73
    $2.73
  • BBI - #2-64x5/8" UNF - Imperial 304 Socket Head Cap Screw UNF | 592062
    BBI - #2-64x5/8" UNF - Imperial 304 Socket Head Cap Screw UNF | 592062
    BBI - #2-64x5/8" UNF - Imperial 304 Socket Head Cap Screw UNF | 592062This BBI #2-64x5/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #2-64x5/8" Thread: UNF Grade: Grade 304 for reliable strength Finish:...
    $1.69
    $1.69
  • BBI - #3-56x5/8" UNF - Imperial 304 Socket Head Cap Screw UNF | 592061
    BBI - #3-56x5/8" UNF - Imperial 304 Socket Head Cap Screw UNF | 592061
    BBI - #3-56x5/8" UNF - Imperial 304 Socket Head Cap Screw UNF | 592061This BBI #3-56x5/8" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #3-56x5/8" Thread: UNF Grade: Grade 304 for reliable strength Finish:...
    $2.54
    $2.54
  • BBI - #1-64x3/4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592060
    BBI - #1-64x3/4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592060
    BBI - #1-64x3/4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592060This BBI #1-64x3/4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: #1-64x3/4" Thread: UNC Grade: Grade 304 for reliable strength Finish:...
    $1.83
    $1.83

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