KLEIN TOOLSFastener-Holding Nut Drivers

KLEIN TOOLS Hollow Round Shank Nut Driver: Straight, SAE, With Magnetized Tip, Std

The KLEIN TOOLS Hollow Round Shank Nut Driver is a straight, fastener-holding nut driver with a round shank and a 3/8 in tip size (MPN 646-3/8M). It features a magnetized tip and is designed for SAE fasteners.

SKU 3G-OTH-303182

Also listed as: 64638M · 646 3 8M · 646-3-8M

Brand

KLEIN TOOLS

Item

Hollow Round Shank Nut Driver: Straight, SAE, With Magnetized Tip, Std

Local availability & support — Singapore

Local office: 20 Woodlands Link #09-05, Singapore 738733
Phone: +65 8878 8355
Delivery: Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment: Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to: Singapore

Technical Specifications

KLEIN TOOLS

Manufacturer Part Number

646-3/8M 

Type

SAE, With Magnetized Tip, Std 

Tip Size

3/8 in 

Technical Documents

No technical documents available for this product.

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KLEIN TOOLS Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

Frequently Asked Questions

What is the KLEIN TOOLS 646-3/8M nut driver used for?

The KLEIN TOOLS 646-3/8M hollow round shank nut driver is used for driving and removing SAE hex fasteners. Its magnetized tip holds screws or nuts securely, making it ideal for electrical panel work, machinery assembly, and maintenance tasks across industrial facilities.

What are the specifications of the KLEIN TOOLS 646-3/8M nut driver?

The KLEIN TOOLS 646-3/8M is a straight, fastener-holding nut driver with a round shank and a 3/8 in tip size. It is designed for SAE fasteners, features a magnetized tip, and is classified as standard (Std). The manufacturer part number is 646-3/8M.

Where to buy the KLEIN TOOLS 646-3/8M nut driver worldwide?

3G Electric supplies the KLEIN TOOLS 646-3/8M nut driver to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your location. Contact us to order this fastener-holding nut driver for your facility.

How to maintain a KLEIN TOOLS magnetized nut driver?

To maintain a KLEIN TOOLS magnetized nut driver like the 646-3/8M, keep the tip clean of debris and metal filings. Store it separately from other tools to avoid demagnetization. If magnetism weakens, use a commercial magnetizer. Regularly inspect the shank for wear to ensure secure fastener engagement.

Used in

Common applications for KLEIN TOOLS

Electrical installation — Klein Tools Phillips screwdriver (MPN 603-6) for securing terminal blocks and panel covers.

Telecommunications cabling — Klein Tools fiberglass fish tape repair kit (MPN 56025) for maintaining pulling tools in conduit runs.

Industrial maintenance — Klein Tools ratchet wire crimper (MPN 3005CR) for terminating non-insulated connectors on 10-22 AWG wire.

Field service — Klein Tools leather tool pouch (MPN 5167) for carrying knives and screwdrivers on a work belt.

Precision assembly — Klein Tools torque screwdriver (MPN 57032) for applying controlled torque to fasteners in equipment enclosures.

General fabrication — Klein Tools adjustable wrench (MPN D509-8) for gripping nuts and bolts in tight spaces.

KLEIN TOOLS Products

3G Electric supplies KLEIN TOOLS fastener-holding nut drivers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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