Eliminate the guesswork in bolt identification and machine repair with the HARDEN 580412 52-Piece Screw Pitch Gauge. Designed for professional automotive technicians, industrial engineers, and custom fabricators, this master set allows you to instantly identify thread sizes on bolts, nuts, and tapped holes. Whether you are sourcing a replacement fastener for a classic engine or calibrating a lathe for threading, the 580412 provides the "lock-and-fit" accuracy required for high-stakes mechanical assembly.

Forged from premium hardened spring steel, each leaf features a precision-milled tooth profile that perfectly nests into the threads of a fastener. This set is uniquely versatile, containing a full range of Metric (60°) pitches and Whitworth (55°) Imperial pitches. Each leaf is permanently stamped with its specific pitch value, ensuring the markings remain legible even after years of exposure to cutting fluids and engine oil. Housed in a chrome-plated steel sheath with dual locking thumb-nuts, this tool is built to be a lifetime fixture in any professional's chest.

Key Features & Benefits:

• 52-Piece Master Collection: A comprehensive range covering almost every standard thread encountered in modern and vintage machinery.

• Dual Standard Compatibility: Includes Metric (0.25–6.0mm) and Whitworth (4–62 TPI) for universal project coverage.

• Hardened Spring Steel Leaves: Precision-ground tooth profiles resist wear and deforming, maintaining pitch accuracy over thousands of checks.

• Permanently Stamped Markings: High-contrast values are etched into the steel to prevent fading from grease or solvents.

• Dual Locking Thumb-Nuts: Allows you to secure the selected leaf in place for easier measuring or to lock the entire set for storage.

• Compact Folding Design: The slim, pocket-sized profile is ideal for "on-the-fly" identification at the hardware counter or on the shop floor.

Technical Specifications:

• Model Number: 580412

• Total Leaves: 52

• Metric Range: 0.25 to 6.0mm (60° Thread Angle)

• Whitworth Range: 4 to 62 TPI (55° Thread Angle)

• Material: Hardened Polished Spring Steel

• Finish: Industrial Chrome Plated Casing

Ideal For:

• Automotive Restoration: Identifying threads on vintage bolts where modern metric sizes don't fit.

• Industrial Machining: Verifying the pitch of a workpiece before cutting threads on a lathe.

• Hardware Sourcing: Bringing the tool to the market to ensure you buy the exact replacement fastener needed.

• General Maintenance: Sorting mixed bins of bolts and nuts into their correct sizes quickly.

We don't send anything by standard post, all of our deliveries are by trusted couriers which are fully traceable to ensure your orders arrive safe and on time.

Delivery Prices & Transit Times

Delivery costs can be found at checkout.

Delivery Cut-Off

For same day dispatch orders, orders should place by 2 p.m, Monday – Friday, for next working day delivery on selected products. Orders placed after 2 p.m. will be shipped on the next working day.

If you have an urgent order or need a last-minute shipment, please reach out to our Sales Team—there may still be a chance to get it dispatched today!

Note that certain items may have a lead time, so the estimated delivery times apply only once the order has been shipped. Product descriptions will clearly indicate if a lead time is required.

For further inquiries, Call our sales team now on 033-50325252.