 
            A spanner or socket tightens the hexagonal-shaped head of hex head screws. Hexagonal shapes are used in the design of bolts and nuts because they are simple to turn. With six sides, a fastener only has to be turned a sixth to get to the following flat parallel. The six-sided head hex cap screw tightens with a wrench or a drill. On hexagonal bolts and nuts, there are six horizontal parallels. Hexagonal fasteners may turn easier than other fastening types due to their six laterals.
Key Features:
-  Enables you to use more tightening tension 
-  Nearby surfaces might not sustain harm 
-  Insert screws with just a key 
-  Providing maximum strength, three times stronger than machine screws 
-  Screw offers the best alignment 
Product Specifications:
-  Brand: Volvo Penta 
-  SKU: 3858499 
-  Weight: 0.03 LBS 
-  Diagram Reference Number: 18 
-  Unit Of Measure: EA 
-  New Genuine OEM: Yes 
-  Condition: New 
-  Manufacturer Part Number (MPN): 3858499 
-  Replaces Products: 855595 
Volvo Penta Exploded view / schematic Circulation Pump and Thermostat
This product replaces:
- 855595
 
         
                     
                     
             
            