Klein Tools
Klein Tools 646-7/16-INS Insulated Nut Driver 7/16-Inch 6-Inch Hollow Shaft
Insulated 7/16-inch nut driver with 6-inch hollow shaft for protected fastener work
- Insulated design protects against electric shock
- Hollow shaft clears long bolts through the tip
- Cushion grip reduces hand fatigue during use
- ESD-safe construction prevents static damage to components
- SAE 7/16-inch size fits standard fasteners
7/16-Inch Insulated Nut Driver
The Klein Tools 646-7/16-INS is a hollow-shaft nut driver built for 7/16-inch SAE fasteners. Its insulated construction and ESD-safe rating suit electrical and utility work where shock protection matters. A 6-inch shank reaches recessed hardware while a cushioned grip reduces hand fatigue during extended use. The hollow round shank allows bolt pass-through for long-threaded studs.
Electrical and maintenance professionals
Electricians, HVAC technicians and facility maintenance crews benefit from the insulated shaft and ESD-safe handling when working near live circuits or sensitive components. The 9/32-inch bolt clearance accommodates standard hardware in panel and junction-box tasks. Users who require magnetic fastener retention or a shorter shank for tight enclosures should consider alternative driver styles.
6-inch hollow insulated shaft
The defining specification is the 6-inch hollow round shank combined with full insulation and ESD-safe materials. This length and profile determine reach into deep cabinets and the ability to drive nuts onto long studs without bottoming out. Verify that the 7/16-inch tip and 9/32-inch bolt clearance match the fastener dimensions in your application before purchase.
Highlights
- Insulated design protects against electric shock
- Hollow shaft clears long bolts through the tip
- Cushion grip reduces hand fatigue during use
- ESD-safe construction prevents static damage to components
- SAE 7/16-inch size fits standard fasteners
Specifications
| Brand | Klein Tools |
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Questions about this item
Should I pick the 7/16 inch tip or a different size for my fasteners?
Choose the 7/16 inch tip when the bolt or nut measures 7/16 inch across the flats; the hollow shank clears threads up to 9/32 inch deep.
What does the insulated SAE rating mean when I use this on live circuits?
The insulation protects against electric shock during work on energised parts, while the SAE sizing fits standard fractional fasteners.
How does the 6 inch hollow shank affect reach and bolt clearance?
The 6 inch shank extends reach into recesses, and the hollow round profile lets long bolts pass through up to 9/32 inch clearance.
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