► 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 - 1/4"-20x3 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592655
    BBI - 1/4"-20x3 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592655
    BBI - 1/4"-20x3 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592655This BBI 1/4"-20x3 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/4"-20x3 Thread: UNC Grade: Grade 304 for reliable strength...
    $3.12
    $3.12
  • BBI - 1/4"-20x3 1/4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592650
    BBI - 1/4"-20x3 1/4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592650
    BBI - 1/4"-20x3 1/4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592650This BBI 1/4"-20x3 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1/4"-20x3 Thread: UNC Grade: Grade 304 for reliable strength...
    $2.60
    $2.60
  • BBI - 1"-8x6" UNC - Imperial 304 Socket Head Cap Screw UNC | 592509
    BBI - 1"-8x6" UNC - Imperial 304 Socket Head Cap Screw UNC | 592509
    BBI - 1"-8x6" UNC - Imperial 304 Socket Head Cap Screw UNC | 592509This BBI is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1x6 Thread: UNC Grade: Grade 304 for reliable strength Finish: 304...
    $196.56
    $196.56
  • BBI - 1"-8x5" UNC - Imperial 304 Socket Head Cap Screw UNC | 592507
    BBI - 1"-8x5" UNC - Imperial 304 Socket Head Cap Screw UNC | 592507
    BBI - 1"-8x5" UNC - Imperial 304 Socket Head Cap Screw UNC | 592507This BBI is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1x5 Thread: UNC Grade: Grade 304 for reliable strength Finish: 304...
    $195.50
    $195.50
  • BBI - 1"-8x4 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592505
    BBI - 1"-8x4 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592505
    BBI - 1"-8x4 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592505This BBI is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1x4-1/2 Thread: UNC Grade: Grade 304 for reliable strength Finish:...
    $152.65
    $152.65
  • BBI - 1"-8x4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592503
    BBI - 1"-8x4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592503
    BBI - 1"-8x4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592503This BBI is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1x4 Thread: UNC Grade: Grade 304 for reliable strength Finish: 304...
    $148.30
    $148.30
  • BBI - 1"-8x3 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592501
    BBI - 1"-8x3 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592501
    BBI - 1"-8x3 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592501This BBI is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1x3-1/2 Thread: UNC Grade: Grade 304 for reliable strength Finish:...
    $129.86
    $129.86
  • BBI - 1"-8x3" UNC - Imperial 304 Socket Head Cap Screw UNC | 592499
    BBI - 1"-8x3" UNC - Imperial 304 Socket Head Cap Screw UNC | 592499
    BBI - 1"-8x3" UNC - Imperial 304 Socket Head Cap Screw UNC | 592499This BBI is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1x3 Thread: UNC Grade: Grade 304 for reliable strength Finish: 304...
    $122.09
    $122.09
  • BBI - 1"-8x2 3/4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592497
    BBI - 1"-8x2 3/4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592497
    BBI - 1"-8x2 3/4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592497This BBI is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1x2-3/4 Thread: UNC Grade: Grade 304 for reliable strength Finish:...
    $98.70
    $98.70
  • BBI - 1"-8x2 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592495
    BBI - 1"-8x2 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592495
    BBI - 1"-8x2 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592495This BBI is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1x2-1/2 Thread: UNC Grade: Grade 304 for reliable strength Finish:...
    $88.63
    $88.63
  • BBI - 1"-8x2 1/4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592493
    BBI - 1"-8x2 1/4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592493
    BBI - 1"-8x2 1/4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592493This BBI is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1x2-1/4 Thread: UNC Grade: Grade 304 for reliable strength Finish:...
    $81.10
    $81.10
  • BBI - 1"-8x2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592491
    BBI - 1"-8x2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592491
    BBI - 1"-8x2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592491This BBI is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 1x2 Thread: UNC Grade: Grade 304 for reliable strength Finish: 304...
    $74.43
    $74.43
  • BBI - 7/8"-9x6" UNC - Imperial 304 Socket Head Cap Screw UNC | 592489
    BBI - 7/8"-9x6" UNC - Imperial 304 Socket Head Cap Screw UNC | 592489
    BBI - 7/8"-9x6" UNC - Imperial 304 Socket Head Cap Screw UNC | 592489This BBI 7/8"-9x6" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 7/8"-9x6" Thread: UNC Grade: Grade 304 for reliable strength Finish:...
    $139.85
    $139.85
  • BBI - 7/8"-9x5" UNC - Imperial 304 Socket Head Cap Screw UNC | 592485
    BBI - 7/8"-9x5" UNC - Imperial 304 Socket Head Cap Screw UNC | 592485
    BBI - 7/8"-9x5" UNC - Imperial 304 Socket Head Cap Screw UNC | 592485This BBI 7/8"-9x5" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 7/8"-9x5" Thread: UNC Grade: Grade 304 for reliable strength Finish:...
    $162.16
    $162.16
  • BBI - 7/8"-9x4 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592483
    BBI - 7/8"-9x4 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592483
    BBI - 7/8"-9x4 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592483This BBI 7/8"-9x4 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 7/8"-9x4 Thread: UNC Grade: Grade 304 for reliable strength...
    $114.41
    $114.41
  • BBI - 7/8"-9x4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592481
    BBI - 7/8"-9x4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592481
    BBI - 7/8"-9x4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592481This BBI 7/8"-9x4" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 7/8"-9x4" Thread: UNC Grade: Grade 304 for reliable strength Finish:...
    $109.33
    $109.33
  • BBI - 7/8"-9x3 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592479
    BBI - 7/8"-9x3 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592479
    BBI - 7/8"-9x3 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592479This BBI 7/8"-9x3 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 7/8"-9x3 Thread: UNC Grade: Grade 304 for reliable strength...
    $71.06
    $71.06
  • BBI - 7/8"-9x3" UNC - Imperial 304 Socket Head Cap Screw UNC | 592477
    BBI - 7/8"-9x3" UNC - Imperial 304 Socket Head Cap Screw UNC | 592477
    BBI - 7/8"-9x3" UNC - Imperial 304 Socket Head Cap Screw UNC | 592477This BBI 7/8"-9x3" is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 7/8"-9x3" Thread: UNC Grade: Grade 304 for reliable strength Finish:...
    $68.69
    $68.69
  • BBI - 7/8"-9x2 3/4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592475
    BBI - 7/8"-9x2 3/4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592475
    BBI - 7/8"-9x2 3/4" UNC - Imperial 304 Socket Head Cap Screw UNC | 592475This BBI 7/8"-9x2 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 7/8"-9x2 Thread: UNC Grade: Grade 304 for reliable strength...
    $66.96
    $66.96
  • BBI - 7/8"-9x2 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592473
    BBI - 7/8"-9x2 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592473
    BBI - 7/8"-9x2 1/2" UNC - Imperial 304 Socket Head Cap Screw UNC | 592473This BBI 7/8"-9x2 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: 7/8"-9x2 Thread: UNC Grade: Grade 304 for reliable strength...
    $64.94
    $64.94

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