PROTO Socket Bit: 3/8 in Drive Size, Hex Tip, 4 mm Tip Size, 2 23/32 in Overall Lg
The PROTO Socket Bit (MPN J4990-4M) is a hex bit socket with a 3/8 in drive size and a 4 mm hex tip. It features a fixed insert design and has an overall length of 2 23/32 in. This PROTO-branded tool is suitable for…
SKU 3G-OTH-305233
Also listed as: J49904M · J4990 4M
Local availability & support
- Delivery
- Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
- Payment
- Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.
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Product Description
The PROTO Socket Bit (MPN J4990-4M) is a hex bit socket with a 3/8 in drive size and a 4 mm hex tip. It features a fixed insert design and has an overall length of 2 23/32 in. This PROTO-branded tool is suitable for industrial applications requiring a fixed hex bit socket.
Frequently Asked Questions
What is the PROTO J4990-4M socket bit used for?
The PROTO J4990-4M is a hex bit socket used for driving hex fasteners in industrial assembly, maintenance, and repair tasks. Its 3/8 in drive and 4 mm hex tip make it suitable for precision work on machinery, automotive, and equipment where a fixed insert design is required.
What are the specifications of the PROTO J4990-4M socket bit?
The PROTO J4990-4M is a hex bit socket with a 3/8 in drive size, a 4 mm hex tip, and a fixed insert design. Its overall length is 2 23/32 in. This PROTO-branded tool is designed for industrial applications requiring a fixed hex bit socket.
Where to buy the PROTO J4990-4M socket bit worldwide?
You can source the PROTO J4990-4M socket bit through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide locations. Contact us for availability and lead time.
How to select the correct PROTO socket bit for my application?
To select the correct PROTO socket bit, match the drive size (e.g., 3/8 in) to your ratchet or driver, and the tip size (e.g., 4 mm hex) to the fastener. Ensure the overall length (2 23/32 in) provides adequate reach. For fixed insert designs, confirm the bit is non-removable for your task.
Used in
Common applications for PROTOPROTO Products
3G Electric supplies PROTO hex bit sockets. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
