Short Back Cap with O-Ring 300S (57Y04) for 17/18/26 TIG Torches – 1 or 3 Pack

Short 300S back caps for 17/18/26 torches—maximum clearance, secure sealing, and easy installation. Available in 1- or 3-packs.

Short Back Cap with O-Ring 300S (57Y04) for 17/18/26 TIG Torches – 1 or 3 Pack

Short Back Cap with O-Ring 300S (57Y04) for 17/18/26 TIG Torches – 1 or 3 Pack

Short Back Cap with O-Ring 300S (57Y04) for 17/18/26 TIG Torches – 1 or 3 Pack

Short Back Cap with O-Ring 300S (57Y04) for 17/18/26 TIG Torches – 1 or 3 Pack

Short Back Cap with O-Ring 300S (57Y04) for 17/18/26 TIG Torches – 1 or 3 Pack

Short Back Cap with O-Ring 300S (57Y04) for 17/18/26 TIG Torches – 1 or 3 Pack

Short Back Cap with O-Ring 300S (57Y04) for 17/18/26 TIG Torches – 1 or 3 Pack

Short Back Cap with O-Ring 300S (57Y04) for 17/18/26 TIG Torches – 1 or 3 Pack

Short Back Cap with O-Ring 300S (57Y04) for 17/18/26 TIG Torches – 1 or 3 Pack

Short 300S back caps for 17/18/26 torches—maximum clearance, secure sealing, and easy installation. Available in 1- or 3-packs.

$19.99

  • Overview
  • Features
  • Specifications

Overview plus

These short 300S (57Y04) back caps are designed for 17/18/26 style TIG torches that use 3-series consumables. Each cap includes an O-ring to provide a secure, leak-free seal and proper tungsten clamping during welding.

The short length maximizes rear clearance, making these back caps ideal for tight spaces and restricted-access welding applications. Perfect as replacements or spares for everyday TIG welding.

Available as a single cap or a 3-pack.

Warranty Information

3-Year Warranty

PrimeWeld offers a no-hassle 3-year warranty.* Click here to learn more.

Customer Support

Customer service, parts, technical support all located in the USA.

Click here to give us a call at (856) 500-2000.

Features plus

  • Part Number: 300S (57Y04)

  • Style: Short back cap

  • Compatibility: 17/18/26 style TIG torches (3-series)

  • Includes: O-ring installed

  • Pack Options: 1 cap or 3 caps

  • Function: Secures tungsten; seals rear of torch body

Specifications plus

  • Short-length back cap for 17/18/26 style TIG torches

  • 300S / 57Y04 specification

  • Includes O-ring for proper sealing

  • Provides maximum rear clearance

  • Helps secure tungsten electrode

  • Durable construction for regular shop use

  • Available in 1-pack or 3-pack

  • Compatible with CK17, CK18, CK26, WP-17, WP-18, WP-26, TL17, TL26, and other 3-series torches

0 Items in your cart

Subtotal $0

Tax and shipping will be calculated at checkout.

Your shopping cart is empty.