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Front-right angle view of Tekton 21 millimeter impact drive 12-point socket. Item #SID14321
Back angle view of Tekton 21 millimeter impact drive 12-point socket. Item #SID14321
Person holding Tekton 21 millimeter impact drive 6-point socket. Item #SID14121
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Item #SID14321

3/8 Inch Drive x 21 mm Semi-Deep 12-Point Impact Socket

•
InchMetric

Sizes

6 mm
$6
7 mm
$6
8 mm
$6
9 mm
$6
10 mm
$6
11 mm
$6
12 mm
$6
13 mm
$6
14 mm
$6
15 mm
$6
16 mm
$6
17 mm
$6
18 mm
$6
19 mm
$7
20 mm
$7
21 mm
$7
22 mm
$7
23 mm
$7
24 mm
$7
$7.00
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Also Available:

Shallow Socket • Deep Socket • 6-Point

DetailsSpecifications

Details

Image of Tekton 7/8 inch 12-point impact drive sockets in shallow, semi-deep, and deep lengths

Our 3/8 Inch Drive Impact Socket Lineup

Our 3/8 inch drive 12-point impact socket lineup consists of shallow (previously called standard), semi-deep, and deep length sockets.
Images of the front and back of a 15 mm impact socket, showing the laser marking on the front and the stamped marking on the back

Two Size Markings

The size is marked in two ways on every socket—both as a high-visibility laser marking and a permanent stamped marking.
A semi-deep 12-point impact socket cut in half to show the full-length socket well

Full-Length Socket Well

The interior well extends far into the socket, which allows for better fastener engagement in more situations.
The square end of a 19 mm impact socket, with smooth walls, chamfered inner rim, and detent pin hole labeled

Drive Tool Retention

Sockets work with both types of anvils found on 3/8 inch drive impact wrenches:
Graphic showing green check marks on friction ring anvil and detent pin anvil

Prevents Fastener Round-Off

Radiused corners prevent fastener round-off by applying force to a fastener's flat sides, rather than its corners.
Tekton 3/8 inch drive impact sockets and accessories on a light gray background.

High-Performing Steel Alloys

Part by part, we choose the best combination of steel alloys, heat treating specifications, and forming processes to meet the highest performance requirements. Learn more

  • 50BV30 Chromium-Vanadium (Cr-V)
    - 6-point shallow, semi-deep, and deep sockets
    - 12-point semi-deep and deep sockets
  • 4140 Chromium-Molybdenum (Cr-Mo)
    - Universal joint socket base
  • 6140 Chromium-Vanadium (Cr-V)
    - 12-point shallow sockets
    - 3, 6, and 10 inch extensions
  • 8660 Nickel-Chromium-Molybdenum (Ni-Cr-Mo)
    - Adapter
    - Reducer
    - Universal joint ball/tang
All pieces have a corrosion-resistant manganese phosphate coating.

Specifications

3/8 Inch Drive x 21 mm Semi-Deep 12-Point Impact Socket

Specs for 3/8 Inch Drive x 21 mm Semi-Deep 12-Point Impact Socket
Country of Origin
Taiwan
Item Weight
0.27 lb.