PROTO J4990-MST 25-Piece Hex Short Bit Socket Set, 3/8 in Drive, 4 mm to 10 mm
The PROTO Socket Bit Set: 1 is a 25-piece hex short bit socket set with a 3/8 in drive size and a tip size range of 4 mm to 10 mm. It features a fixed insert design and is identified by manufacturer part number…
SKU 3G-OTH-316927
Also listed as: J4990MST · J4990 MST
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Product Description
The PROTO Socket Bit Set: 1 is a 25-piece hex short bit socket set with a 3/8 in drive size and a tip size range of 4 mm to 10 mm. It features a fixed insert design and is identified by manufacturer part number J4990-MST.
Frequently Asked Questions
What is the PROTO J4990-MST socket bit set used for?
The PROTO J4990-MST is a 25-piece hex short bit socket set designed for driving hex fasteners in industrial assembly, maintenance, and repair tasks. Its 3/8 in drive and 4 mm to 10 mm tip range suit automotive, machinery, and equipment applications where compact access is needed.
What are the specifications of the PROTO J4990-MST socket bit set?
The PROTO J4990-MST is a 25-piece hex short bit socket set with a 3/8 in drive size and a tip size range of 4 mm to 10 mm. It features a fixed insert design and is identified by manufacturer part number J4990-MST. The set includes 7 pieces covering the tip range.
Where to buy the PROTO J4990-MST socket bit set worldwide?
3G Electric supplies the PROTO J4990-MST socket bit set worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact us to source this PROTO hex short bit socket set for your operations.
How to select the right PROTO socket bit set for your application?
To select the right PROTO socket bit set, match the drive size (e.g., 3/8 in) and tip size range (e.g., 4 mm to 10 mm) to your fasteners. Consider bit length—short bits suit confined spaces. The J4990-MST's fixed insert design ensures secure bit retention during use.
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Common applications for PROTOPROTO Products
3G Electric supplies PROTO hex short bit socket sets. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.