Best Welds 900-98w77 O-ring Tig Torch Back Caps

Product Description

The BEST WELDS 900-98w77 is a replacement O-ring designed for use with TIG torch back caps. This small but essential sealing component maintains a proper gas-tight fit between the back cap and torch body, preventing shielding gas leaks that can compromise weld quality. It is used with the 41V24 Long Back Cap, 41V33 Short Back Cap, and 41V35 Medium Back Cap. Fabricators, pipe welders, and TIG welding technicians performing routine torch maintenance or back cap replacement will reach for this part to restore proper torch performance quickly and reliably.

This O-ring is compatible with Series 9 and Series 20 TIG torches, which are widely used in light-duty to medium-duty TIG welding applications across fabrication shops, maintenance facilities, and job sites. It serves as a direct replacement during back cap service intervals or whenever visible wear, cracking, or gas leakage is detected at the back cap connection.

Key Features

• Direct replacement O-ring for 41V24, 41V33, and 41V35 back caps
• Seals the back cap-to-torch body interface to prevent shielding gas leaks
• Compatible with Series 9 and Series 20 TIG torches
• Manufactured in the United States
• Low-cost consumable that restores torch gas integrity without full torch replacement

Compatibility

Designed for use with the 41V24 Long Back Cap, 41V33 Short Back Cap, and 41V35 Medium Back Cap on Series 9 and Series 20 TIG torches.

Installation Notes

Installation is performed by a qualified welding technician or maintenance professional. Before servicing the torch, disconnect the torch from the power source and shut off shielding gas supply at the regulator. Remove the existing back cap, extract the worn O-ring, seat the new 900-98w77 O-ring properly in the groove, and reinstall the back cap. Inspect for gas leaks after reassembly before returning the torch to service.

Technical Specifications

• Type: O-Ring
• Used With: 41V24 Long Back Cap, 41V33 Short Back Cap, 41V35 Medium Back Cap
• Compatible Torches: Series 9, Series 20
• Country of Origin: US

Standard Information

• Brand: BEST WELDS
• Manufacturer Part Number: 900-98w77