THK C14 Cap Plug For LM Guide Rails

Description:

The THK C14 Cap Plug is a rail mounting hole cap designed to seal unused or exposed mounting holes in THK LM Guide rails. It helps prevent chips, dust, coolant, and other contaminants from entering the mounting holes, protecting the guide system and maintaining reliable machine operation. Commonly installed on THK linear motion guide rails used in CNC machine tools, automation equipment, semiconductor machinery, and industrial manufacturing systems. Maintenance teams and machine builders use this accessory during equipment assembly, maintenance, and replacement of missing rail hole plugs.

Applications:

The THK C14 Cap Plug is part of THK's C Cap accessory series for LM Guide rails. It is specifically sized for rails utilizing M14 mounting bolts and is press-fitted into the rail mounting hole after the mounting bolt has been installed. The cap creates a flush surface that helps prevent foreign material from accumulating in the rail holes while reducing the risk of debris entering the LM block during operation. The reference "#329379" is an internal inventory or catalog identifier and is not an official THK model designation.

Technical Specifications:

• Brand: THK
• Part Number: C14
• Description: Cap Plug / Rail Mounting Hole Cap
• Product Type: LM Guide Accessory
• Compatible Mounting Bolt Size: M14
• Outside Diameter (D): 23.5 mm
• Height (H): 5.7 mm
• Installation Method: Press-fit into LM rail mounting hole
• Function: Covers and seals rail mounting holes after bolt installation
• Compatible Equipment: THK LM Guide Rails using M14 mounting bolts
• Material: Engineered resin (THK standard cap material)
• Color: Standard THK cap finish (varies by production)
• Features: Prevents chips and contaminants from entering mounting holes, provides a flush rail surface, improves cleanliness, and helps protect LM guide performance.

Common Replacements:

• THK C12 Cap Plug
• THK C16 Cap Plug
• THK C22 Cap Plug