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PROTO 1/4" Drive Metric Flex Impact Socket - 1/4" Drive Metric Flex Impact Sockets
PROTO1/4" Drive Metric Flex Impact Sockets

PROTO 1/4" Drive Metric Flex Impact Socket

The PROTO J66555MP is a 1/4" Drive Metric Flex Impact Socket with a 5.5 mm socket size. It features a 12-point standard design with a Black Oxide finish and is Not Tether Capable. This industrial-grade impact socket…

SKU 3G-OTH-314902

Brand
PROTO
Item
1/4" Drive Metric Flex Impact Socket
Part Number
J66555MP
Category
1/4" Drive Metric Flex Impact Sockets
Available to Order
Also known as:J66555MPPROTO
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Technical Specifications

PROTO
Manufacturer Part Number
J66555MP
Type
12-Point, Std, Black Oxide, Not Tether Capable, Metric

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PROTO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The PROTO J66555MP is a 1/4" Drive Metric Flex Impact Socket with a 5.5 mm socket size. It features a 12-point standard design with a Black Oxide finish and is Not Tether Capable. This industrial-grade impact socket is manufactured by PROTO.

Frequently Asked Questions

What is the PROTO J66555MP impact socket used for?

The PROTO J66555MP is a 1/4" drive metric flex impact socket designed for heavy-duty fastening and loosening of 5.5 mm fasteners in industrial maintenance, automotive repair, and assembly applications. Its 12-point standard profile and black oxide finish provide corrosion resistance and durability under high-torque impact tool use.

What are the specifications of the PROTO J66555MP impact socket?

The PROTO J66555MP has a 5.5 mm socket size, 1/4" drive, 12-point standard design, and a black oxide finish. It is not tether capable. The manufacturer part number is J66555MP. This metric flex impact socket is built for industrial-grade use with impact wrenches and drivers.

Where to buy the PROTO J66555MP impact socket worldwide?

You can source the PROTO J66555MP impact socket through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine PROTO tools to industrial buyers internationally.

How to select the correct PROTO impact socket for a 5.5 mm fastener?

For a 5.5 mm fastener, choose a 5.5 mm socket size with a 1/4" drive, such as the PROTO J66555MP. Ensure the socket is impact-rated (not hand-tool only) and matches the fastener drive type—12-point for hex fasteners. Black oxide finish aids corrosion resistance. Confirm tether capability if required for overhead work.

Used in

Common applications for PROTO
Industrial maintenance — PROTO J6014CXCERT micrometer torque wrench for tightening fasteners to 50–250 ft-lb with tether capability.
Assembly operations — PROTO J6345A electronic torque wrench for 5–50 ft-lb control with audible and visual indicators.
Plumbing and mechanical — PROTO J812HD straight pipe wrench with 2 in jaw capacity for gripping and turning pipes.
Precision fastening — PROTO J61929 multi-bit screw and nut driver kit with 26 alloy steel bits for assembly and maintenance.
Tool organization — PROTO JUC3743-3SG heavy-duty utility cart with drawers, power strip, and padlock for shop floor use.
Metric fastener service — PROTO JSCVM-20SB 20-piece ratcheting combination wrench set covering 6 mm to 32 mm.
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PROTO Products

3G Electric supplies PROTO 1/4" drive metric flex impact sockets. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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