Socket Accessories · M340086-C
3/4 to 1/2 Socket Adapter
3/4 Inch Female to 1/2 Inch Male Reducing Adaptor with Ball Detent and Socket Clip
Pair it with
This item: 3/4 to 1/2 Socket Adapter, 3/4 Inch Female… (3/4")
$6.99
8 Piece 12 Point SAE Combination Wrench Set (5/16 Inch-3/4…
$49.99
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Why this one
3/4 to 1/2 inch reducer
Reduces a 3/4 inch drive ratchet or handle to 1/2 inch drive, so the bigger handle and its leverage can work on 1/2 inch drive sockets.
Ball detent
A ball detent on the male end securely grips the socket, so it stays on the adapter while you work.
Satin finish
A satin finish gives a better grip when you are handling sockets and fitting the adapter.
Socket clip, adapter set
Supplied with a metal socket clip for use with a socket rail, and it is also included in adapter set TTADP17.
Read the full description
The Teng Tools M340086-C is a reducing adaptor with a 3/4 inch female square drive and a 1/2 inch male square drive. It allows a 3/4 inch drive ratchet or handle to be used with smaller 1/2 inch drive sockets, so mechanics can switch between drive sizes without changing their primary ratchet. Buyers often search for it as a 3/4 to 1/2 adapter or a 3/4 to 1/2 drive adapter; the direction runs from the larger drive down to the smaller one.
A ball detent on the male end firmly grips the 1/2 inch socket. The adaptor is chrome vanadium (CrV) with a satin finish for secure handling, and it is supplied with a metal socket clip for use with a socket rail.
The length is 40 mm (1.6 in) and the weight is 164 g (5.8 oz). Teng Tools rates it Impact: No, so it belongs with hand ratchets, extension bars and handles rather than an impact wrench.
What you get: 1 x reducing adaptor, 3/4 inch female to 1/2 inch male, with a metal socket clip. Ratchet, extension bar, sockets and socket rail are not included.
- The female end fits a 3/4 inch drive ratchet, extension bar or handle and the male end takes 1/2 inch drive sockets. As a 3/4 female to 1/2 male adapter it lets you switch between drive sizes without changing your primary ratchet, so the 3/4 inch drive handle you already have on the job also covers the smaller sockets.
- A ball detent on the 1/2 inch male end grips the socket firmly, so it stays on the adapter while you line it up on the nut and while you pull the tool back out. A firm pull releases it when you change size. A ratchet adapter goes on and off many times in a working day, so a secure hold on the socket matters.
- Made from chrome vanadium (CrV) with a satin finish for secure handling and a better grip when handling sockets. The body is marked CR-V. A socket reducer is a small part that is easy to lose in a large drawer, so it is supplied with a metal socket clip for use with a socket rail, where it can stay with the rest of the set.
- Length is 40 mm (1.6 in) and the weight is 164 g (5.8 oz). The short body keeps the socket close to the drive and adds little reach, which helps where there is limited room around a large fastener. Store this square drive adapter on the rail at the end of your 1/2 inch drive sockets so it is always there when you need it.
- Teng Tools rates it Impact: No, so it is for hand ratchets, extension bars and handles, not for an impact wrench. Use it when a 3/4 inch drive tool is already in your hand and the fastener calls for a 1/2 inch drive socket, whether in a service bay, a workshop or out on a job. Ratchet and sockets are not included.
Part number: M340086-C
Get it in a set
This socket accessories also comes in these 2 sets, with the tools that go with it.
Specifications
| Type | Sockets & Accessories |
|---|---|
| Category | Socket Accessories |
| Drive size | 3/4" |
| Part number | M340086-C |
Data sheet
Full details from Teng Tools. Download PDF
Lifetime warranty
Send a photo and your order number. Same-day shipping on replacements.
Ships from Texas
From our Fort Worth warehouse.
Questions?
Call (817) 767-3392.
Shipping
Free shipping on orders over $99. Orders are stocked, picked and shipped from our warehouse in Fort Worth, Texas — orders placed on business days ship same-day wherever possible.
Lifetime warranty
Teng Tools hand tools are backed by a lifetime warranty against manufacturing defects. Screwdriver bits and socket bits are consumables and are guaranteed to meet dimensional standards. Torque wrenches and air tools can be serviced and recalibrated on request — contact us to arrange it.
Returns
Not right for the job? Contact us within 30 days of delivery and we'll sort out a return or exchange. Tools must be unused and in their original packaging. Warranty claims are handled separately — a defective tool is our problem, not yours.
Why Teng Tools?
Swedish Design Since 1985
Trusted in 30+ countries. Designed in Sweden, built to ISO and DIN standards.
Shipped Fast from Texas
US warehouse in Fort Worth, so orders move fast. TAA approved for government and defense.
Lifetime Warranty
Something goes wrong? Send a photo and your order number — same-day shipping on replacements.
The Devil Is in the Detail
Satin-finish wrenches, through-blade screwdrivers, heavy-gauge storage — built to last.

