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Socket Head Cap Screw (Full Thread)
Socket Head Cap Screw (Full Thread)

CSK Cap Screw

Countersunk Cap Screws are socket-drive fasteners with a flat head that sits flush with the surface for a smooth finish. They are manufactured to ASTM, DIN, and ISO standards in alloy steel, stainless steel, carbon steel, or brass. The internal hex drive allows easy tightening in limited spaces while ensuring strong fastening strength. Available in black oxide, zinc plated, galvanized, or stainless finishes, they offer both strength and corrosion resistance. They are widely used in machinery, automotive, furniture, construction, and applications requiring a clean, flush surface finish.

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Description

Premium Quality CSK Cap Screw Supplier in Dubai, UAE

Unifastener Industries LLC is a reliable supplier and manufacturer of premium-quality CSK Cap Screws in Dubai, UAE. The company specializes in industrial fastening solutions designed for machinery assemblies, engineering projects, automotive systems, furniture manufacturing, and heavy-duty industrial applications. CSK Cap Screws, also known as Countersunk Socket Cap Screws, are specially designed threaded fasteners featuring a countersunk head with an internal hex socket drive. These screws allow the head to sit flush with the surface after installation, providing a smooth and clean finish along with secure and precision fastening performance. Manufactured using high-grade materials and advanced production standards, CSK Cap Screws provide excellent strength, corrosion resistance, durability, and reliable long-lasting fastening performance in demanding industrial environments.


Standards:
– ASTM A574 (alloy steel socket-head cap screws)
– ASTM F835 (alloy steel socket/countersunk screws)
– DIN 7991 (countersunk socket head cap screws)
– ISO 10642 (countersunk hexagon socket head cap screws)
– ISO 898-1 (mechanical properties of carbon/alloy steel fasteners)

Grades:
– Alloy steel (quenched and tempered – high strength)
– Stainless steel A2 / A4 (AISI 304 / 316 for corrosion resistance)
– Carbon steel (standard applications)
– Brass (light-duty decorative applications)

Material Options:
– Alloy steel (black oxide finish)
– Carbon steel (zinc plated, HDG, nickel plated)
– Stainless steel (polished or brushed finish)
– Brass (decorative polished finish)

Size Range:
– Diameter: M3 to M24 (1/8″ to 1″)
– Length: 6mm to 200mm
– Drive: internal hex/Allen drive (DIN 7991 / ISO 10642)

Types:
– Standard countersunk hex socket cap screw
– Flat head countersunk screw
– Stainless steel countersunk screw
– Tamper-resistant countersunk screw (pin-in-hex)

Properties:
– Designed with a flat head to sit flush with or below the surface
– Provides neat finish and prevents snagging in assemblies
– High tensile strength (especially in alloy steel grades)
– Ideal for applications requiring hidden/flush fastening

Coating Options:
– Black oxide finish
– Zinc electroplated (clear, yellow, or black)
– Hot-dip galvanized (ASTM A153 / DIN EN ISO 1461)
– Nickel or chrome plated
– Stainless steel natural polished finish

Add-ons:
– Can be supplied with matching washers or nuts
– Available in bulk contractor packs or retail kits
– Certification/test reports (mechanical and coating properties) available on request

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