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Round Threading Dies
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  5. Round Threading Dies
  6. Burkit 1/2"-20 UNF…
Burkit

Burkit 1/2"-20 UNF Left Hand Tap and Die Set, 3.3 oz | Thread Cutting & Repair Tool

Burkit 1/2"-20 UNF Left Hand Tap and Die Set, 3.3 oz | Thread Cutting & Repair Tool - main product image
All-inclusive price — duties & taxes paid, no customs charges at delivery
₹4,340₹6,590

You save ₹2,250 (34%)

34% off the seller list price

Qty
Burkit 1/2"-20 UNF Left Hand Tap and Die Set, 3.3 oz | Thread Cutting & Repair Tool — 3/4"-10 Left Hand
3/4"-10 Left Hand
₹5,810
₹9,190
In Stock
Burkit 1/2"-20 UNF Left Hand Tap and Die Set, 3.3 oz | Thread Cutting & Repair Tool — 1/2"-13 Left Hand
1/2"-13 Left Hand
₹4,630
₹6,780
In Stock
Burkit 1/2"-20 UNF Left Hand Tap and Die Set, 3.3 oz | Thread Cutting & Repair Tool — 3/4"-16 Left Hand
3/4"-16 Left Hand
₹6,620
₹9,440
In Stock
Burkit 1/2"-20 UNF Left Hand Tap and Die Set, 3.3 oz | Thread Cutting & Repair Tool — 1/2"-20 Left Hand
1/2"-20 Left Hand
₹4,340
₹6,590
In Stock

Estimated doorstep delivery by 7 Nov - 9 Nov from USA

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Restore or Create Precise Left-Hand Threads

About this item

The Burkit 1/2"-20 UNF Left Hand Tap and Die Set is engineered for precision thread processing and repair. Made with high-speed steel (HSS 6542) for the tap and durable alloy tool steel for the die, this set is built to last. The tap's straight flute design ensures fast chip removal, preventing blockages and speeding up your machining tasks. It's suitable for processing threads in various through holes and shallow blind holes across a range of metals including cast iron, copper, brass, and steel. The die features a secure conical locking hole, ensuring it stays firmly in place on your wrench during use, making external thread repair efficient and reliable.

This set is designed for left-hand threading, offering a specific solution for applications requiring reverse threads. When cutting or repairing threads, it's crucial to use appropriate lubricating oil on the cutting edge. Reversing the die every 1/4 to 1/2 turn facilitates chip discharge through the designated holes, preventing buildup and ensuring a clean thread finish. The recommended feed rates vary by material hardness, with slower speeds advised for harder metals to maintain tool integrity and achieve optimal results.

For Indian workshops, this imported set provides a specialized solution for left-hand threading needs, complementing standard metric or imperial tools. While local alternatives may offer general threading capabilities, this set's specific left-hand UNF configuration ensures compatibility for specialized projects. All customs duties and GST are pre-paid, with delivery via ExpressBox tracked shipping. The price you see includes all import charges.

Key Features

  • Tap Material: High-Speed Steel 6542 (M2), Cutting Diameter: 1/2 Inch, TPI: 20 Teeth per Inch, Cutting Direction: Left Hand, Accuracy Class: 2B.
  • Die Material: Alloy Tool Steel, Cutting Diameter: 1/2 Inch, TPI: 20 Teeth per Inch, Cutting Direction: Left Hand, Accuracy Class: 2A.
  • Technology: Straight fluted design, fast chip removal, and no blocking make your threads machining faster and easier.
  • Applications: Widely used in cast iron, copper, brass, abrasive steel, A3 steel, and other metal materials to process threads.
  • Package Include: 1 set 1/2-20 UNF Left Hand Tap&Die.

Why choose this product

Precision Left-Hand Threading for Specialized Repairs

This Burkit set offers a precise solution for left-hand threading, a requirement often overlooked by general-purpose tool sets. Whether you're repairing a specific component or working on a project demanding reverse threads, this imported tool ensures accuracy. Unlike generic tools that might only handle standard right-hand threads, this set is purpose-built. Its high-speed steel tap and alloy tool steel die are selected for durability, providing reliable performance for intricate metalworking tasks. The secure locking mechanism on the die prevents loosening during operation, crucial for maintaining thread integrity.

Ideal for Metalworking Professionals & DIYers

This set is best suited for machinists, mechanics, and serious DIY enthusiasts who encounter left-hand threads or need to repair damaged threads on bolts, studs, or pipes. It's particularly useful for working with materials like cast iron, copper, brass, and various steels. Those who primarily work with standard right-hand threads or only need basic thread chasing might find this specialized set unnecessary. If your projects do not involve left-hand threads or require a wider range of metric sizes, consider a more general-purpose tap and die kit.

How to use

  • Select the Correct Tool — Ensure you are using the left-hand tap and die for the 1/2"-20 UNF thread size. Verify the material you are working with is compatible (cast iron, copper, brass, steel).
  • Prepare for Threading — Apply appropriate lubricating oil to the cutting edge of the die or tap. For taps, ensure you are processing a through hole or shallow blind hole, not a deep blind hole.
  • Cut or Repair Threads — For the die, align its conical locking hole with a wrench and tighten. For the tap, use with a tapping machine or manually. Control speed based on material hardness (slower for harder metals) and reverse every 1/4-1/2 turn to clear chips.

Example scenarios

Typical situations where Burkit 1/2"-20 UNF Left Hand Tap and Die Set helps — illustrative scenarios, not customer reviews.

1
Scenario 1
Illustrative example
Where it helps

Repairing a damaged left-hand thread on a specialized automotive component or industrial machinery part.

How this product helps

This Burkit set's 1/2"-20 UNF LH tap and die allows for precise restoration of reverse threads, preventing costly part replacement. Its durable construction ensures reliable performance on common metals found in Indian workshops.

2
Scenario 2
Illustrative example
Where it helps

Needing to create left-hand threads for custom fixtures or unique assembly requirements in metal fabrication.

How this product helps

For projects requiring specific left-hand threads, this imported set provides the exact 1/2"-20 UNF specification. Its HSS tap and alloy steel die offer the necessary sharpness and strength for clean thread cutting on various metal stock.

Specifications & installation

Installation & usage

ApplicationsProcessing and repairing threads on cast iron, copper, brass, abrasive steel, A3 steel, and other metal materials.
Recommended Feed Rate (Tap)Hard steel: 5-10 m/min, Cast iron: 8-10 m/min, Ordinary steel: 6-15 m/min
Usage SuggestionAdd lubricating oil to cutting edge; reverse every 1/4~1/2 turn for chip discharge.
Accuracy ClassTap: 2B, Die: 2A

How we compare

FeatureBurkit 1/2"-20 UNFOthers
Thread DirectionLeft Hand (LH) - 1/2"-20 UNFPrimarily Right Hand (RH) — Left Hand UNF sets are specialized and less common, often requiring custom orders or higher prices.
Tap MaterialHigh-Speed Steel 6542 (M2)Varies; common local sets may use carbon steel or lower-grade HSS, offering less durability and edge retention.
Die MaterialAlloy Tool SteelVaries; often alloy steel, but quality and hardness can differ significantly between brands.
Thread StandardUNF (Unified National Fine) - 20 TPILocal sets often focus on Metric (M-series) or coarser Imperial (UNC) threads; specific UNF LH sets are rare.

Product details

SKUgkv8140
BrandBurkit
Model Number1/2"-20 UNF Left Hand
Cutting Diameter1/2 Inch (12.7 mm)
TPI (Teeth Per Inch)20
Cutting DirectionLeft Hand
Accuracy ClassTap: 2B, Die: 2A
Tap MaterialHigh-Speed Steel 6542 (M2)
Die MaterialAlloy Tool Steel
ColorSilver
Weight3.3 oz (93.6 g)
Package Dimensions12.5 cm x 10.7 cm x 1.5 cm
Country of OriginNot stated by manufacturer — US retail version, sourced from authorized US retailers and authorized brand partners

About Burkit

Burkit offers specialized metalworking tools, focusing on precision threading solutions like taps and dies for various industrial and repair applications.

Compliance & Legal

No product-specific compliance warnings identified. Standard imported-goods terms apply: customs duties & GST paid; for personal use in India; follow the manufacturer's usage instructions on the packaging.

Customer Reviews

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FAQ, See What Others Asked

How do I know which size and thread standard to order?
Identify the fastener you are working with — measure the outside diameter and thread pitch, then match to the marking on the die (for example M10x1.5 metric or 3/8-24 UNF imperial). Ordering the exact standard and pitch shown in the listing avoids mismatched threads. This Burkit set is specifically for 1/2"-20 UNF Left Hand threads.
Can a hex threading die cut new threads or only clean up existing ones?
It depends on the specific die. Many hex dies are designed as rethreading/chasing dies to restore damaged threads on bolts and studs, while some are rated to cut fresh threads on bar stock. This Burkit set is suitable for processing threads in various through holes and shallow blind holes, and for repairing external threads.
Is this Burkit Tap and Die Set suitable for use in India?
Yes, this Burkit 1/2"-20 UNF Left Hand Tap and Die Set can be imported and used in India. All customs duties and GST are pre-paid and included in the listed price. Delivery is via ExpressBox tracked shipping, ensuring it reaches your pincode reliably.
What materials can this tap and die set be used on?
This set is widely used on cast iron, copper, brass, abrasive steel, A3 steel, and other metal materials. The high-speed steel tap and alloy tool steel die are designed for durability across these common workshop metals.
How do I ensure optimal performance when using the die?
Appropriate lubricating oil should be added to the die-cutting edge when cutting. It is recommended to reverse the die every 1/4 to 1/2 turn to facilitate chip discharge from the chip hole. This process helps maintain tool sharpness and ensures a clean thread finish.

Frequently bought together

Burkit 1/2"-20 UNF Left Hand Tap and Die Set, 3.3 oz | Thread Cutting & Repair Tool

This item:

Burkit 1/2"-20 UNF Left Hand Tap and Die Set, 3.3 oz | Thread Cutting & Repair Tool

₹4,340

Burkit 1/2"-20 UNF Left Hand Tap and Die Set, 3.3 oz | Thread Cutting & Repair Tool

This item

Burkit 1/2"-20 UNF Left Hand Tap and Die Set, 3.3 oz | Thread Cutting & Repair Tool

₹4,340

Total price:

₹14,780

You save ₹7,780 (34%) Extra

3 items selected

3 items

₹14,780

You save ₹7,780 (34%) Extra

Product Comparison

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Spec
Price
₹4,340
₹6,590
₹5,810
₹9,190
₹4,630
₹6,780
₹6,620
₹9,440
₹3,940
₹5,980
₹3,690
₹5,540
₹3,260
₹4,530
Brand NameBurkitBurkitBurkitBurkitASZLBYMASZLBYMASZLBYM
SourceUS RetailUS RetailUS RetailUS RetailUS RetailUS RetailUS Retail
Sold ByCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrow
Imported from USA
₹4,340₹6,590

You Save ₹2,250

Estimated doorstep delivery by 7 Nov - 9 Nov from USA
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International Air Shipping
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Consignment to India Warehouse
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₹13,020+ (3× the price)
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