Screw Service Master

A pin type anchor bolt is a heavy-duty mechanical fastener for securing items to concrete/masonry, featuring a slotted sleeve and an internal expansion pin; you drill a hole, insert the anchor, then hammer the pin in to expand the sleeve, creating a strong, vibration-resistant hold for heavy fixtures like machinery, brackets, or structural supports. 

A hex bolt is a common fastener with a hexagonal (six-sided) head and a threaded shaft, designed for strong connections in machinery, construction, and automotive uses, tightened with a wrench or socket, and used with nuts or tapped holes for secure fastening

An Allen bolt (or socket head cap screw) is a type of fastener with a cylindrical head and a recessed hexagonal (six-sided) socket drive, tightened using a L-shaped hex key (Allen wrench) for high torque in tight spaces, offering a clean, flush finish for machinery, furniture, and bicycles

A carriage bolt is a fastener with a smooth, rounded head and a square section (neck) beneath it, designed to pull tight into wood or square holes, preventing rotation for one-sided installation with just a wrench. Used for wood-to-wood, furniture, and security applications, its key features are the self-locking square neck, dome head, and smooth shank, available in various materials like steel and stainless steel, often galvanized for outdoor use. Key Characteristics

• Head: A rounded, dome-shaped head that sits flush or slightly raised, providing a smooth finish and preventing snagging.
• Square Neck: A square shoulder under the head that digs into wood or a square hole, stopping the bolt from turning when a nut is tightened.
• Shank: Smooth, with no threads under the head (though some variations exist), ideal for wood connections where threads aren't needed.
• Self-Locking: The square neck allows installation from one side only, making it ideal for securing items like gates, swings, or locks. 

Common Applications

• Construction: Decks, porches, swing sets, timber framing, and general outdoor structures.
• Furniture: Attaching wood beams and frames for sturdy joints.
• Security: Securing hinges and locks where access is limited. 

Materials & Finishes

• Materials: Low carbon steel, alloy steel, stainless steel, brass.
• Finishes: Zinc plated, hot-dip galvanized (HDG) for corrosion resistance, or plain. 

 

• Carriage Bolts - Garg FastenersThis makes the bolt self-locking when it is placed through a square hole in a metal strap. This allows the fastener to be installe...Garg Fasteners
• Carriage Bolts - Standard Bolts & Nuts Sdn. Bhd.Carriage bolts are specialized fasteners designed for use in wood and metal applications. They feature a rounded head with a squar...Standard Bolts & Nuts Sdn. Bhd.
• Carriage Bolts | DIN 603, 607, 605, 608 Standards | Get QuoteDescription: Carriage bolts are mostly used in wood to wood fastening and general construction of decks, porches, swing sets and o...ITA Fasteners

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 CSK (Countersunk) machine screw is a fully threaded fastener with a flat, tapered head designed to sit flush or below the surface of the material, creating a smooth, snag-free finish, commonly used in electronics, machinery, and furniture where aesthetics and clearance matter, available in steel/stainless steel with Phillips, Slotted, or Torx drives. 

Elevator Bucket Bolts are specialized fasteners with large, flat, often countersunk heads and square necks (or fanged/ribbed shoulders) designed to securely attach elevator buckets to conveyor belts, preventing rotation and ensuring smooth material handling in systems for grain, cement, and minerals. Made from steel or stainless steel, they provide wear resistance, come in various finishes (galvanized, plain)

A Hex Head Flange Bolt is a fastener with a built-in washer-like flange under its head, providing a larger bearing surface to distribute clamping load evenly, eliminating the need for a separate washer, and ensuring a secure connection for flanged parts in demanding applications like automotive frames or pipe joints