Lang Tools 48-Piece SAE & Metric Thread Restorer Kit (971)

The Lang Tools 48-Piece SAE & Metric Thread Restorer Kit (971) is an essential collection of specialized tools designed to repair and clean damaged threads on various fasteners and in threaded holes. This comprehensive set addresses common issues like cross-threading, corrosion, or minor deformation that can compromise the integrity of bolts, nuts, and threaded components. Unlike traditional tap and die sets that cut new threads, this kit focuses on chasing and reforming existing threads to their original condition, ensuring proper fit and function. Its wide array of SAE (standard) and Metric sizes makes it incredibly versatile, suitable for a broad spectrum of applications, particularly in automotive maintenance, motorcycle repair, ATV, UTV, and general mechanical work. Each tool is crafted from highly tempered carbon steel, providing the strength and durability required for professional and DIY use. The color-coded taps and dies allow for quick identification, and their 6-point design permits usage with standard sockets or wrenches, enhancing convenience. All 48 pieces are neatly organized and protected within a sturdy, blow-molded plastic case, ensuring they are ready for use whenever needed.

KEY FEATURES AND BENEFITS:

• Comprehensive Thread Repair: Provides a full solution for cleaning and reforming damaged external and internal threads, extending the life of fasteners and components.
• Dual Standard Coverage: Includes a wide range of both SAE (Imperial) and Metric sizes, making it universally applicable for various vehicles and machinery.
• Prevents Stripping and Cross-Threading: By restoring threads to their proper form, the kit helps ensure smooth bolt installation, reducing the risk of damage during assembly or disassembly.
• High-Quality Construction: Tools are made from highly tempered carbon steel, offering exceptional strength and wear resistance for long-term performance.
• Organized and Portable: Comes in a durable, blow-molded case that keeps all 48 pieces securely stored and easily accessible, perfect for shop or mobile use.
• Versatile Application: Ideal for automotive, motorcycle, ATV, UTV, and other mechanical tasks where thread integrity is crucial.
• Facilitates Accurate Torque: Clean, restored threads allow for more precise torque application, critical for secure and reliable fastening.

SPECIFICATIONS:

• Kit Contents:
• 7 SAE Coarse Dies: 1/4"-20, 5/16"-18, 3/8"-16, 7/16"-14, 1/2"-13, 9/16"-12, 5/8"-11
• 7 SAE Fine Dies: 1/4"-28, 5/16"-24, 3/8"-24, 7/16"-20, 1/2"-20, 9/16"-18, 5/8"-18
• 10 Metric Dies: M6-1.00, M8-1.25, M10-1.00, M10-1.25, M10-1.50, M11-1.50, M12-1.25, M12-1.50, M12-1.75, M14-1.50
• 6 SAE Coarse Taps: 1/4"-20, 5/16"-18, 3/8"-16, 7/16"-14, 1/2"-13, 9/16"-12
• 6 SAE Fine Taps: 1/4"-28, 5/16"-24, 3/8"-24, 7/16"-20, 1/2"-20, 9/16"-18
• 10 Metric Taps: M6-1.00, M8-1.25, M10-1.00, M10-1.25, M10-1.50, M11-1.50, M12-1.25, M12-1.75, M14-1.50
• 1 Metric Thread Restorer File (8 Sizes): 0.75, 1.00, 1.25, 1.50, 1.75, 2.00, 2.50, 3.00 (all in mm)
• 1 SAE Thread Restorer File (8 Sizes): 11, 12, 13, 14, 16, 18, 20, 24 (all in threads per inch)
• 1 Storage Case
• Dimensions: 9.5" X 13.5" X 2"

HOW TO USE:

1. Identify the Thread Type and Size: Before beginning, accurately determine if the damaged thread is SAE (standard) or Metric, and identify its specific diameter and pitch (threads per inch for SAE, or millimetres per thread for Metric). Use a thread gauge if unsure.
2. Select the Correct Tool: Choose the appropriate tap (for internal threads) or die (for external threads) from the kit that matches the determined thread size and type. For minor surface damage, a thread restorer file might be sufficient.
3. Prepare the Work Area: Clean the area around the damaged thread to remove any debris, rust, or excess material. Applying a small amount of cutting fluid or lubricant can help in the process and extend tool life.
4. Engage the Tool:
   • For External Threads (Dies): Carefully place the chosen die over the end of the damaged bolt or stud, ensuring it is straight and properly aligned with the existing threads. Begin turning the die slowly by hand or with a suitable wrench, applying steady, even pressure.
   • For Internal Threads (Taps): Insert the selected tap into the damaged threaded hole, ensuring it is perpendicular to the surface. Gently turn the tap clockwise a quarter to half a turn, then back it off a quarter turn to clear chips and relieve pressure.
   • For Thread Restorer Files: Select the correct pitch on the file. Apply the file to the damaged section of the thread, gently filing away burrs or reshaping flattened areas.
5. Restore the Thread: Continue to turn the tap or die, maintaining proper alignment, until the entire damaged section of the thread has been worked. For taps, remember the "two steps forward, one step back" motion to prevent binding.
6. Inspect and Clean: Once the thread is restored, remove the tool. Inspect the threads to ensure they are clean, smooth, and properly formed. Clean any remaining debris or metal shavings. The fastener should now thread smoothly into its mating part.

BENEFITS OF USING LANG TOOLS 48-PIECE SAE & METRIC THREAD RESTORER KIT (971):

• Cost-Effective Repairs: Saves money by restoring damaged fasteners and components instead of replacing them, especially for expensive or hard-to-find parts.
• Improved Fastener Reliability: Ensures that bolts and nuts seat correctly and hold securely, preventing loosening or failure in critical applications.
• Time Savings: Quick and efficient thread repair reduces downtime in mechanical projects compared to sourcing replacement parts.
• Enhanced Safety: Properly restored threads allow for accurate torque settings, which is vital for the safe operation of machinery and vehicles.
• Extends Equipment Lifespan: Regular maintenance and thread repair contribute to the longevity of components and overall equipment.
• Reduced Frustration: Eliminates the common struggle of cross-threading or forcing damaged fasteners, making assembly tasks smoother.

FEATURES:

• Precision-machined thread chasers for accurate thread restoration.
• Taps and dies crafted from highly tempered carbon steel for durability.
• Color-coded for immediate size identification during use.
• 6-point design on taps and dies allows use with standard sockets or wrenches.
• Includes specialized thread restorer files for quick, minor thread clean-up.
• Supplied in a custom-fit, blow-molded storage case for organization.
• Designed for both SAE and Metric thread standards, covering a wide range.
• Tools specifically engineered to reform existing threads, not cut new ones.