Socket Head Cap Screws (often called socket cap screws) are high-strength fasteners designed for demanding applications in machinery, robotics, automotive, aerospace, and removable panels. Known for their cylindrical head and hex (Allen) key drive, they provide the strongest clamping force of all socket screw types.
Need US / Inch sizes? We carry those too.
Related Socket Screw Styles
Beyond standard socket caps, the term “socket screw” also refers to:
- Button Head Screws – low-profile dome head to reduce snagging.
- Flat Head Screws – countersunk for flush, smooth surfaces.
Why Choose Monster Bolts Metric Socket Caps?
- High Strength: The strongest of the socket screw family.
- Precision Fit: Tight tolerance design for secure assemblies.
- Versatile: Available in alloy steel, stainless steel, and black oxide finishes.
- Wide Range: Full metric size coverage for industrial and DIY needs.
M2 Socket Head Cap screws, Class 12.9 Alloy Steel w/ Black Oxide
Sale priceFrom $2.04
M2.5 Socket Head Cap screws, Class 12.9 Alloy Steel w/ Black Oxide
Sale priceFrom $1.92
M3 Socket Head Cap screws, Class 12.9 Alloy Steel w/ Black Oxide
Sale priceFrom $1.37
M4 Socket Head Cap screws, Class 12.9 Alloy Steel w/ Black Oxide
Sale priceFrom $1.38
M5 Socket Head Cap screws, Class 12.9 Alloy Steel w/ Black Oxide
Sale priceFrom $1.26
M6 Socket Head Cap screws, Class 12.9 Alloy Steel w/ Black Oxide
Sale priceFrom $1.29
M8 Socket Head Cap screws, Class 12.9 Alloy Steel w/ Black Oxide
Sale priceFrom $2.38
M10 Socket Head Cap screws, Class 12.9 Alloy Steel w/ Black Oxide
Sale priceFrom $3.82
M12 Socket Head Cap screws, Class 12.9 Alloy Steel w/ Black Oxide
Sale priceFrom $7.48
M1.6 Socket Head Cap screws, Stainless Steel A2 (18-8)
Sale priceFrom $2.32
M2 Socket Head Cap screws, Stainless Steel A2 (18-8)
Sale priceFrom $1.26
M2.5 Socket Head Cap screws, Stainless Steel A2 (18-8)
Sale priceFrom $1.08
M3 Socket Head Cap screws, Stainless Steel A2 (18-8)
Sale priceFrom $0.99
M4 Socket Head Cap screws, Stainless Steel A2 (18-8)
Sale priceFrom $1.48
M5 Socket Head Cap screws, Stainless Steel A2 (18-8)
Sale priceFrom $1.78
M6 Socket Head Cap screws, Stainless Steel A2 (18-8)
Sale priceFrom $2.12
M8 Socket Head Cap screws, Stainless Steel A2 (18-8)
Sale priceFrom $3.76
M10 Socket Head Cap screws, Stainless Steel A2 (18-8)
Sale priceFrom $7.08
M12 Socket Head Cap screws, Stainless Steel A2 (18-8)
Sale priceFrom $4.61
M3 Marine Grade Socket Head Cap screws, Stainless Steel A4 (316)
Sale priceFrom $1.25
M4 Marine Grade Socket Head Cap screws, Stainless Steel A4 (316)
Sale priceFrom $1.83
M5 Marine Grade Socket Head Cap screws, Stainless Steel A4 (316)
Sale priceFrom $2.13
M6 Marine Grade Socket Head Cap screws, Stainless Steel A4 (316)
Sale priceFrom $3.25
M8 Marine Grade Socket Head Cap screws, Stainless Steel A4 (316)
Sale priceFrom $6.38
M3-0.5mm Socket Head Cap Screws - Zinc Plated 12.9 Alloy Steel
Sale priceFrom $6.90
M4 x 0.7mm Socket Head Cap Screws - Zinc Plated 12.9 Alloy Steel
Sale priceFrom $7.41
M5-0.8mm Socket Head Cap Screws - Zinc Plated 12.9 Alloy Steel
Sale priceFrom $9.83
M6-1.0mm Socket Head Cap Screws - Zinc Plated 12.9 Alloy Steel
Sale priceFrom $13.04
M8-1.25mm Socket Head Cap Screws - Zinc Plated 12.9 Alloy Steel
Sale priceFrom $30.86
M10-1.5mm Socket Head Cap Screws - Zinc Plated 12.9 Alloy Steel
Sale priceFrom $47.64
M12-1.75mm Socket Head Cap Screws - Zinc Plated 12.9 Alloy Steel
Sale priceFrom $41.80
M16-2.0mm Socket Head Cap Screws - Zinc Plated 12.9 Alloy Steel
Sale priceFrom $50.40
M20-2.5mm Socket Head Cap Screws - Zinc Plated 12.9 Alloy Steel
Sale priceFrom $93.28
M5 Low Head Socket Cap screws, Class 10.9 Alloy Steel w/ Black Oxide
Sale priceFrom $5.06
M6 Low Head Socket Cap screws, Class 10.9 Alloy Steel w/ Black Oxide
Sale priceFrom $3.01
M8 Low Head Socket Cap screws, Class 10.9 Alloy Steel w/ Black Oxide
Sale priceFrom $5.76
M5 Low Head Socket Cap screws, 18-8 Stainless Steel A2
Sale priceFrom $1.71
M6 Low Head Socket Cap screws, 18-8 Stainless Steel A2
Sale priceFrom $2.35
M8 Low Head Socket Cap screws, 18-8 Stainless Steel A2
Sale priceFrom $2.89
M3 Titanium Socket Head Cap screws DIN 912 / ISO 4762
Sale priceFrom $2.45
M4 Titanium Socket Head Cap screws DIN 912 / ISO 4762
Sale priceFrom $2.45
M5 Titanium Socket Head Cap screws DIN 912 / ISO 4762
Sale priceFrom $2.45
M6 Titanium Socket Head Cap screws DIN 912 / ISO 4762
Sale priceFrom $2.19
M4 Titanium Torx Socket Head Cap screws DIN 912 / ISO 4762
Sale priceFrom $2.86
M5 Titanium Torx Socket Head Cap screws DIN 912 / ISO 4762
Sale priceFrom $2.82
M6 Titanium Torx Socket Head Cap screws DIN 912 / ISO 4762
Sale priceFrom $2.94
B-Stock M8-1.00 x 25mm Fine Thread Socket Head Cap screws, Class 12.9 Alloy Steel w/ Black Oxide
Sale price$48.40
Regular price$96.79
M4 Low Head Socket Cap screws, Class 10.9 Alloy Steel w/ Black Oxide
Sale priceFrom $2.06