Teng Tools 3/8 Inch Drive Metric Hex Bit Socket - Allen Socket for Socket Head and Grub Screws, Sold Individually in 9 Sizes 3 mm to 12 mm
Teng Tools 3/8 Inch Drive Metric Hex Bit Socket - Allen Socket for Socket Head and Grub Screws, Sold Individually in 9 Sizes 3 mm to 12 mm
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- Backed by guarantee — built to last a working lifetime
The 3/8 inch drive is the size most mechanics reach for first, and a hex bit socket on it turns socket head cap screws and grub screws with ratchet speed and far more control than an L-key.
Each socket is sold individually in 9 metric sizes: 3, 4, 5, 5.5, 6, 7, 8, 10 and 12 mm. Replace a single lost size or build up an allen socket set one piece at a time.
- 3/8 inch square drive hex bit socket with a metric hex (allen) bit
- 9 metric sizes from 3 mm to 12 mm, including 5.5 mm, each sold individually
- For in-hex fasteners, including socket head cap screws and grub screws
- Fits standard 3/8 inch drive ratchets, extensions and torque wrenches
Sizes & specifications
| Size | Part no. | Length | Weight |
|---|---|---|---|
| 3mm | M381503-C | 1.9" (49.5 mm) | 1.3 oz (38 g) |
| 4mm | M381504-C | 1.9" (49.5 mm) | 1.4 oz (40 g) |
| 5.5mm | M3815055-C | 1.9" (49.5 mm) | 1.6 oz (45 g) |
| 5mm | M381505-C | 1.9" (49.5 mm) | 1.6 oz (45 g) |
| 6mm | M381506-C | 1.9" (49.5 mm) | 1.7 oz (48 g) |
| 7mm | M381507-C | 1.9" (49.5 mm) | 1.7 oz (48 g) |
| 8mm | M381508-C | 1.9" (49.5 mm) | 1.7 oz (48 g) |
| 10mm | M381510-C | 1.9" (49.5 mm) | 1.8 oz (52 g) |
| 12mm | M381512-C | 1.9" (49.5 mm) | 1.9 oz (54 g) |
Lengths and weights in US units with metric in parentheses, straight from official Teng Tools data.
Also part of 5 tool kits
- M3812 Teng Tools 3/8-Inch Drive Hex Bit Socket Clip Rail Set — 9-Piece Allen Head Socket Kit for Ratchets 3-12 mm - M3812
- TED3836 Teng Tools 36 Piece 3/8 Drive 6 Point Metric Socket Wrench Set with Ratchet, TX and Hex Bit Sockets, FOAM2 Tray - TED3836
- TEDBS47 Teng Tools 1/4 & 3/8 Bit Socket Set FOAM2 47 Pieces — TEDBS47
- TTBS35 Teng Tools 35 Piece 1/4 Inch & 3/8 Inch Drive Metric & SAE Bit Socket Set Tool Tray - TTBS35
- TTESK85 Teng Tools 85 Piece 1/4, 3/8 & 1/2 Inch Drive Bit Foam Socket Set - TTESK85
Kits shown in red are available to buy.
Specifications
| Type | Sockets & Accessories |
|---|---|
| Category | Socket Accessories |
| Drive size | 3/8" |
| Measurement standard | Metric |
| Part number | M3815055-C |
Inside this socket
Sectional view through the socket wall, drawn to the published dimensions.
- 3 mm across flats
- 3/8" square drive
- 49.5 mm overall length
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.