ISO 2010 Countersunk Head Screw, Full Thread

The full-thread countersunk head screw complies with the requirements of the international standard ISO 2010. It consists of a cylindrical shank with thread cut along its entire length. The shank of the fastener smoothly transitions into a head with a flat top and a deep slot for a flat-blade screwdriver. It is usually used as a standalone fastener. A long screw, if a through hole is provided, can be secured with a nut and washer.

Key characteristics of countersunk head screws with full thread

Most properties of ISO 2010 screws are repeated in the Russian GOST 17474-80 and the German DIN 964. These include:

• material – plain carbon steel and carbon steel with anti-corrosion coating, stainless steel grades A2 and A4, brass;
• property class – 4.8, 8.8, 10.9;
• field of application – construction, mechanical engineering, instrument making, other industrial and manufacturing sectors.

However, screws made to different standards should not be mistakenly considered full equivalents. This reflects certain discrepancies between measurement systems. For instance, under ISO 2010 the thread size of the screw is given in the metric system and ranges from M2 to M10. Length ranges from 4 mm to 110 mm. Screws should be purchased in accordance with the requirements of assembly drawings, and any substitution should be agreed with specialists.

Advantages and application features

The main advantages of the countersunk head screw with full thread stem from the properties of the raw material and the design solution of the finished fastener. Among the advantages:

• high strength;
• resistance to moisture, and for stainless grade A4 – the ability to be used in acidic, alkaline and saline environments;
• the countersunk head makes the fastening joint practically invisible, and the assembled structure visually aesthetically attractive.

The ability of the ISO 2010 screw to sit flush with the main surface is used by builders and furniture makers when flat surfaces without protruding fastener heads are required.

Installation features

Forming a fastening joint using countersunk head screws requires pre-drilling holes with countersinking of the seat for the head. The hole diameter is made slightly smaller than the fastener size, so that driving it in requires some effort.

Upon completion of driving, the top plane of the head should be flush with the main surface or slightly recessed. This way the joint will be strong, reliable and inconspicuous. In certain cases, if the hole is made through, the ISO 2010 screw can be secured with a nut and washer on the opposite side of the structure.

FLOK’s offer

FLOK supplies the full product range of fasteners in sufficient quantity. For wholesale buyers – a flexible discount system, delivery to any region of Russia. Each batch of goods is accompanied by warranty certificates.