STANLEY STMT77844-23B 4mm VDE Hex Bit Socket (1/2" Drive, 120mm) - Bareilly

Key Specifications at a Glance

What Does 4 × 120 mm Mean?

The 4 mm measurement describes the size of the hexagonal driving tip. It must match the internal hex recess of the fastener. The 120 mm measurement is the catalogue-listed tool length; it should not be assumed to equal the entire usable reach in every installation. Check the socket body dimensions and clearance before choosing it for a deeply recessed location.
A 4 mm hex bit socket does not replace a 4 mm nut socket, slotted screwdriver bit or a larger Allen-bit size. Choosing the wrong profile can damage the fastener and compromise the job.

Where This VDE Hex Bit Socket Is Useful

For electricians, panel builders and industrial maintenance teams, the STMT77844-23B is relevant where the fastener has a 4 mm internal hex head and a 1/2-inch insulated manual drive system is specified. Examples can include electrical control enclosure assembly, panel maintenance and equipment service where sufficient clearance exists. The tool’s nominal 120 mm length may help with some recessed positions, but actual access must be checked on site.
For torque-controlled assembly, use a compatible insulated drive tool and the fastener manufacturer’s specified tightening torque. No exact permissible torque value was verified for this bit socket; do not estimate one.

Check These Four Points Before Ordering

1. Fastener profile: Confirm that the screw has a 4 mm *internal hex* drive.
2. Drive interface: Confirm that your hand ratchet or torque tool accepts a 1/2-inch square drive. In electrical work, use appropriately insulated, compatible equipment, not an unprotected handle.
3. Access and length: Verify that the 120 mm catalogue dimension and the socket head/body geometry fit the available space.
4. Electrical work controls: Inspect insulation for damage and follow your organisation’s isolation, testing and authorised electrical-work procedures. A 1000 V / VDE product label alone is not permission to work on a live circuit.

VDE Hex Bit Socket vs Regular Socket or Allen Key

The STMT77844-23B is a socket-mounted 4 mm hex driver with VDE insulation. A regular socket is generally intended to turn an external nut or bolt head and may have no electrical insulation. An ordinary Allen key can also engage an internal-hex screw, but may not provide the insulated 1/2-inch ratchet/torque-tool interface needed in a specified electrical tool setup. Choose the configuration based on the actual fastener and work procedure, not just the number “4 mm”.
If the fastener takes a different internal-hex size, select the corresponding STANLEY VDE bit-socket variant rather than forcing this tool. The catalogue also lists 5, 6, 8 and 10 mm options within the related range.

Ordering and Delivery for Bareilly Buyers

For contractors standardising multiple electrical toolkits or MRO buyers needing a GST invoice and quantity quotation, include the exact model STMT77844-23B, number of units, Bareilly delivery pincode and required timeframe in the enquiry. The quoted commercial selling unit and price should be confirmed before payment.

Frequently Asked Questions

1. Is STMT77844-23B a 4 mm hex bit or a 4 mm nut socket?

It is a 4 mm hex driver bit socket for compatible internal-hex screw heads. It is not a conventional external-hex nut socket.

2. What drive size does this socket need?

It has a 1/2-inch square-drive interface. Confirm compatibility with the hand ratchet or torque tool and use a suitable insulated drive system for electrical work.

3. Does 120 mm mean 120 mm of usable reach?

Not necessarily. 120 mm is the catalogue-listed length; the accessible working depth depends on the socket profile and surrounding clearance.

4. What does the VDE / 1000 V description mean?

The item is identified as a VDE-insulated tool and is labelled for 1000 V use. Always inspect the actual tool, verify the applicable marking/certification for your work and follow approved electrical safety procedures. It is not automatic authorisation for live work.

5. Can I order the item if the website shows zero stock?

Yes. Indus MegaMart’s stated order policy permits orders and payment when listed stock is zero. For quantities exceeding available stock, including zero stock, the specified delivery window is 7–14 days, subject to destination and order confirmation.

6. What is the price including GST?

The National PDP displayed ₹2,329 including 18% GST on 31 October 2026. Verify the live displayed price, unit quantity and invoice details before purchasing.

7. Can I request bulk supply for a Bareilly project?

You can request a quantity quotation through Indus MegaMart. Share STMT77844-23B, required pieces, invoice details and Bareilly delivery pincode; commercial terms and delivery commitments must be confirmed by the seller.

Buy STANLEY STMT77844-23B for Bareilly Delivery

Choose the exact STANLEY STMT77844-23B 4 mm × 120 mm VDE hex bit socket and complete the purchase through Indus MegaMart’s product page. Check the current GST-inclusive price, selected quantity and delivery pincode before paying. For multiple units or project procurement, send your requirements to Indus MegaMart.