Socket Cap Screws Manufacturer
MT.BOLTS manufactures Socket Cap Screws, which are externally threaded fasteners featuring a recessed internal hex drive (Allen socket) for tightening using hex keys or Allen wrenches. Designed for high-strength applications where precise torque control and flush mounting are critical, socket screws are ideal for machinery, automotive, aerospace, and tooling systems. MT.BOLTS offers a wide range of socket screws in various materials, sizes, and global standards to meet the demanding requirements of engineering and industry.
- System of Measurement:
Metric (M6–M64) | Imperial (1/4″ to 2.5″) - Length Range:
- Metric: 3 mm to 300 mm
- Imperial: 1/8″ to 12″
- Thread Pitch:
Metric (Coarse) | UNC - Thread Type:
Full or partial thread, depending on length and standard - Head Type:
- Socket Head Cap Screws (SHCS)
- Button Head Socket Screws
- Flat Head Socket Screws (Countersunk)
- Low Head Socket Cap Screws
- Finish Options:
Plain, zinc-plated, hot-dip galvanized, black oxide, passivated, or custom coatings - Standards:
- ASME B18.3 – Inch Series Socket Head Cap Screws
- ISO 4762 / ISO 10642 / ISO 7380 – Metric Socket Screws
- DIN 912 / DIN 7991 / DIN 7380 – German standards
- BS 2470 / BS 4168 – British socket screws standards
- Custom & OEM standards available upon request
Socket Cap Screws Material Types
MT.BOLTS supplies carbon steel, stainless steel, duplex steel, and nickel-based alloy Socket Cap Screws, meeting the demanding requirements of chemical, marine, and high-temperature environments, compliant with various international standards.
| Material Category | Common Grades/Models | Description |
| Carbon Steel | ASTM A307, A325, A490 | High strength and cost-effective, suitable for general structures; requires anti-corrosion coating. |
| Stainless Steel | 304 (A2), 316 (A4), 321, 410 | Excellent corrosion resistance; widely used in food, chemical, and construction industries |
| Duplex Stainless Steel | UNS S31803/S32205 (F51), UNS S32750 (F53) | High strength with superior chloride corrosion resistance; used in seawater, petrochemical, and paper industries |
| Monel Alloys | Monel 400, Monel K500 | Excellent seawater corrosion resistance and mechanical strength; used in marine engineering and pump systems |
| Hastelloy Alloys | Hastelloy C276, C22, B2, X | Excellent resistance to strong acids and oxidizing media; widely used in chemical equipment and flue gas desulfurization |
| Inconel Alloys | Inconel 600, 625, 718 | Resistant to high temperature, pressure, and corrosion; used in heat exchangers, aerospace, and nuclear industries |
| Incoloy Alloys | Incoloy 800, 825, 925 | Ideal for high-temperature acidic environments; widely used in petroleum refining and heat treating systems |
| Nickel Alloys | Nickel 200, 201 | Pure or high-nickel alloys with excellent conductivity and alkali resistance; used in electronics and chemical applications |
Socket Cap Screws System of Measurement
- Metric Sizes: M1.6 to M64
- Imperial Sizes: #0 to 2.5″
- Length Range:
- Metric: 3 mm to 300 mm
- Inch: 1/8″ to 12″
- Thread Pitch:
- Metric: Coarse / Fine
- Imperial: UNC / UNF
- Thread Type: Full thread or partial thread (depending on length and spec)
- Types of Socket Cap Screws: Common types include socket head cap screws, low head socket screws, button head screws, flat head socket screws, set screws, and shoulder screws.
Socket Cap Screws Common Standards
- ASME B18.3 – Inch series socket head cap screws
- ISO 4762 – Metric socket head cap screws
- DIN 912 – German standard (widely equivalent to ISO 4762)
- BS 2470 / BS 4168 – British socket screws
- ISO 12474 / ISO 14580 – Additional socket drive variations
Socket Cap Screws Surface Finishes
- Zinc-plated – Corrosion resistance in indoor environments
- Hot-dip galvanized – Excellent protection in outdoor/marine use
- Black oxide – Mild corrosion resistance, often for aesthetic or indoor use
- Passivated – Used on stainless steel bolts to improve corrosion resistance
- Custom Coatings (e.g., PTFE) – Non-stick, chemical-resistant for harsh environments
Why Choose MT.BOLTS
- Material Diversity
- Standardized Production
- Ample Inventory
- Competitive Pricing
- Low-MOQ Customization
Benefits and Limitations of Socket Cap Screws
Advantages
- High tensile strength and shear resistance
- Clean, compact head allows installation in limited space
- Internal hex drive resists cam-out and allows torque control
- Aesthetic, flush-fitting head profile
- Ideal for pre-assembled or tight mechanical environments
Disadvantages
- Requires hex key or Allen wrench, which may not be as universally available as spanners
- Recess can strip under excessive torque if improper tools are used
- Not ideal where tamper resistance is needed unless modified
Send Us A Message
Socket Cap Screws Applications
- Precision machinery and equipment
- Aerospace components
- Automotive assemblies (engine parts, brake systems)
- Robotics and automation systems
- Die sets, jigs, and fixtures
- Electronics housings and enclosures
FAQ About Socket Cap Screws
Typically a hex key (Allen wrench) or hex bit socket.
Yes, if not over-torqued or exposed to fatigue/cracks; always inspect before reuse.
Yes, they are usually made from higher-grade alloy steels with higher tensile ratings.
Yes, if specified in stainless steel or coated with corrosion-resistant finishes like hot-dip galvanizing or PTFE.
Socket heads are taller and allow higher torque, while button heads are lower profile but with lower strength.
Related Products
17-4 PH Stainless Steel Fasteners
17-4 PH Stainless Steel Fasteners Supplier MT.BOLTS manufactures 17-4 PH stainless steel fasteners using high-quality precipitation-hardening stainless steel. These fasteners
18-8 stainless steel fasteners
18-8 Stainless Steel Fasteners Supplier MT.BOLTS manufactures 18-8 stainless steel fasteners using high-quality austenitic stainless steel grades such as 304,
ASTM A307 Bolts
ASTM A307 Bolts Supplier MT.BOLTS manufactures ASTM A307 carbon steel bolts using high-quality low-carbon steel materials. These bolts offer reliable