► 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 - M3-0.50x30mm (Pt) - Metric Socket Head Cap Screw A2-70 (304) | 538021
    BBI - M3-0.50x30mm (Pt) - Metric Socket Head Cap Screw A2-70 (304) | 538021
    BBI - M3-0.50x30mm (Pt) - Metric Socket Head Cap Screw A2-70 (304) | 538021This BBI M3 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: M3 Grade: A2-70 for reliable strength Finish: 304 Stainless Steel...
    $0.24
    $0.24
  • BBI - M4-0.70x6mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538020
    BBI - M4-0.70x6mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538020
    BBI - M4-0.70x6mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538020This BBI M4 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: M4 Grade: A2-70 for reliable strength Finish: 304 Stainless Steel...
    $0.18
    $0.18
  • BBI - M4-0.70x5mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538019
    BBI - M4-0.70x5mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538019
    BBI - M4-0.70x5mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538019This BBI M4 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: M4 Grade: A2-70 for reliable strength Finish: 304 Stainless Steel...
    $0.39
    $0.39
  • BBI - M3-0.50x25mm (Pt) - Metric Socket Head Cap Screw A2-70 (304) | 538018
    BBI - M3-0.50x25mm (Pt) - Metric Socket Head Cap Screw A2-70 (304) | 538018
    BBI - M3-0.50x25mm (Pt) - Metric Socket Head Cap Screw A2-70 (304) | 538018This BBI M3 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: M3 Grade: A2-70 for reliable strength Finish: 304 Stainless Steel...
    $0.21
    $0.21
  • BBI - M3-0.50x20mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538016
    BBI - M3-0.50x20mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538016
    BBI - M3-0.50x20mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538016This BBI M3 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: M3 Grade: A2-70 for reliable strength Finish: 304 Stainless Steel...
    $0.17
    $0.17
  • BBI - M3-0.50x16mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538012
    BBI - M3-0.50x16mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538012
    BBI - M3-0.50x16mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538012This BBI M3 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: M3 Grade: A2-70 for reliable strength Finish: 304 Stainless Steel...
    $0.12
    $0.12
  • BBI - M3-0.50x12mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538010
    BBI - M3-0.50x12mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538010
    BBI - M3-0.50x12mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538010This BBI M3 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: M3 Grade: A2-70 for reliable strength Finish: 304 Stainless Steel...
    $0.12
    $0.12
  • BBI - M3-0.50x10mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538008
    BBI - M3-0.50x10mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538008
    BBI - M3-0.50x10mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538008This BBI M3 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: M3 Grade: A2-70 for reliable strength Finish: 304 Stainless Steel...
    $0.13
    $0.13
  • BBI - M3-0.50x8mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538006
    BBI - M3-0.50x8mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538006
    BBI - M3-0.50x8mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538006This BBI M3 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: M3 Grade: A2-70 for reliable strength Finish: 304 Stainless Steel...
    $0.12
    $0.12
  • BBI - M3-0.50x6mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538004
    BBI - M3-0.50x6mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538004
    BBI - M3-0.50x6mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538004This BBI M3 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: M3 Grade: A2-70 for reliable strength Finish: 304 Stainless Steel...
    $0.12
    $0.12
  • BBI - M3-0.50x5mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538003
    BBI - M3-0.50x5mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538003
    BBI - M3-0.50x5mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538003This BBI M3 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: M3 Grade: A2-70 for reliable strength Finish: 304 Stainless Steel...
    $0.20
    $0.20
  • BBI - M3-0.50x4mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538002
    BBI - M3-0.50x4mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538002
    BBI - M3-0.50x4mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538002This BBI M3 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: M3 Grade: A2-70 for reliable strength Finish: 304 Stainless Steel...
    $0.16
    $0.16
  • BBI - M3-0.50x3mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538001
    BBI - M3-0.50x3mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538001
    BBI - M3-0.50x3mm (Ft) - Metric Socket Head Cap Screw A2-70 (304) | 538001This BBI M3 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: M3 Grade: A2-70 for reliable strength Finish: 304 Stainless Steel...
    $0.61
    $0.61
  • BBI - M48-5.00x240mm (Pt) - Metric Class 12.9 Socket Head Cap Screw ISO 4762 / DIN 912 | 532999
    BBI - M48-5.00x240mm (Pt) - Metric Class 12.9 Socket Head Cap Screw ISO 4762 / DIN 912 | 532999
    BBI - M48-5.00x240mm (Pt) - Metric Class 12.9 Socket Head Cap Screw ISO 4762 / DIN 912 | 532999This BBI M48 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: M48 Thread: ISO Metric Grade:...
    $664.56
    $664.56
  • BBI - M12-1.25x65mm (Pt) - Metric Class 12.9 Socket Head Cap Screw ISO 4762 / DIN 912 - Fine | 532998
    BBI - M12-1.25x65mm (Pt) - Metric Class 12.9 Socket Head Cap Screw ISO 4762 / DIN 912 - Fine | 532998
    BBI - M12-1.25x65mm (Pt) - Metric Class 12.9 Socket Head Cap Screw ISO 4762 / DIN 912 - Fine | 532998This BBI M12 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: M12 Thread: ISO...
    $5.64
    $5.64
  • BBI - M48-5.00x200mm (Pt) - Metric Class 12.9 Socket Head Cap Screw ISO 4762 / DIN 912 | 532996
    BBI - M48-5.00x200mm (Pt) - Metric Class 12.9 Socket Head Cap Screw ISO 4762 / DIN 912 | 532996
    BBI - M48-5.00x200mm (Pt) - Metric Class 12.9 Socket Head Cap Screw ISO 4762 / DIN 912 | 532996This BBI M48 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: M48 Thread: ISO Metric Grade:...
    $612.77
    $612.77
  • BBI - M48-5.00x180mm (Pt) - Metric Class 12.9 Socket Head Cap Screw ISO 4762 / DIN 912 | 532995
    BBI - M48-5.00x180mm (Pt) - Metric Class 12.9 Socket Head Cap Screw ISO 4762 / DIN 912 | 532995
    BBI - M48-5.00x180mm (Pt) - Metric Class 12.9 Socket Head Cap Screw ISO 4762 / DIN 912 | 532995This BBI M48 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: M48 Thread: ISO Metric Grade:...
    $569.46
    $569.46
  • BBI - M12-1.25x35mm (Ft) - Metric Class 12.9 Socket Head Cap Screw ISO 4762 / DIN 912 - Fine | 532993
    BBI - M12-1.25x35mm (Ft) - Metric Class 12.9 Socket Head Cap Screw ISO 4762 / DIN 912 - Fine | 532993
    BBI - M12-1.25x35mm (Ft) - Metric Class 12.9 Socket Head Cap Screw ISO 4762 / DIN 912 - Fine | 532993This BBI M12 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: M12 Thread: ISO...
    $3.74
    $3.74
  • BBI - M48-5.00x160mm (Pt) - Metric Class 12.9 Socket Head Cap Screw ISO 4762 / DIN 912 | 532992
    BBI - M48-5.00x160mm (Pt) - Metric Class 12.9 Socket Head Cap Screw ISO 4762 / DIN 912 | 532992
    BBI - M48-5.00x160mm (Pt) - Metric Class 12.9 Socket Head Cap Screw ISO 4762 / DIN 912 | 532992This BBI M48 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: M48 Thread: ISO Metric Grade:...
    $457.92
    $457.92
  • BBI - M12-1.75x200mm.t=175 - Metric Class 12.9 Socket Head Cap Screw ISO 4762 / DIN 912 | 532991
    BBI - M12-1.75x200mm.t=175 - Metric Class 12.9 Socket Head Cap Screw ISO 4762 / DIN 912 | 532991
    BBI - M12-1.75x200mm.t=175 - Metric Class 12.9 Socket Head Cap Screw ISO 4762 / DIN 912 | 532991This BBI M12 is a cylindrical socket head cap screw driven with an Allen key for high-torque clamping.► Key Features Size: M12 Thread: ISO Metric Grade: Class...
    $962.87
    $962.87

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