Automobile Parts — Type 1B1 Hexagon Socket Tapered Plug

Automobile Parts — Type 1B1 Hexagon Socket Tapered Plug — Product Introduction

The Type 1B1 hexagon socket tapered plug is an automotive sealing fastener conforming to JIS D 2101 (1B1). The product uses a tapered thread to mate with an internal pipe thread and achieves sealing through thread interference. It is mainly used for sealing applications in hydraulic equipment, pneumatic equipment, pumps, automobiles and other fields. According to the standard definition, Type 1B1 belongs to the “Type 1 B1 form” tapered plug. It has a hexagon socket in the head and adopts a countersunk design, so it can sit flush with the mounting surface after tightening. The plug is usually made of alloy steel, and the surface can be blackened, zinc plated or trivalent chromate treated. It is suitable for pipeline plugging applications requiring reliable sealing and compact space.

1. Product Features

• Hexagon socket drive design: The head has a hexagon socket, allowing installation with a hex key. It is suitable for confined spaces or countersunk installation applications.
• Tapered thread sealing: It adopts a tapered pipe thread structure. When screwed in, the thread interference forms a seal, achieving reliable sealing without an additional sealing washer.
• Countersunk and floating types available: Depending on the reference diameter position, it is divided into countersunk type (flush with the mounting surface after tightening) and floating type (end face above the mounting surface).
• Various materials and surface treatments: Common materials include carbon steel (such as SCM435) and stainless steel. Surfaces can be blackened, zinc plated, trivalent chromate treated, etc.

2. Product Advantages

• Reliable sealing performance: The tapered thread design forms a metal-to-metal sealing fit during tightening, effectively preventing oil or gas leakage.
• Convenient installation and small space occupation: The hexagon socket drive allows operation with a standard hex key. The countersunk type sits flush with the parent surface after installation, suitable for compact assembly spaces.
• Sealant-free design: Some models achieve sealing without additional sealant or PTFE tape after tightening.
• High standardization: As an automotive industry standard part, it has uniform dimensions and good interchangeability, facilitating maintenance and spare parts management.

3. Scope of Application

• Automotive industry: Plugging of oil ports and process holes in engines, transmissions, hydraulic systems, pneumatic systems, etc.
• Hydraulic and pneumatic equipment: Sealing connections for hydraulic valve blocks, cylinders, pneumatic cylinders, pumps, etc.
• General machinery: Various mechanical equipment pipeline ports requiring tapered thread sealing and plugging.