Lisle 81090
Lisle 81090 TP50 Torx Plus Bit Socket User Manual
Model: 81090 | Brand: Lisle
1. Product Overview
The Lisle 81090 TP50 Torx Plus Bit Socket is a specialized tool designed for specific automotive fastening applications. This durable bit socket is engineered to provide reliable performance for tasks requiring a Torx Plus drive system.

Figure 1: Lisle 81090 TP50 Torx Plus Bit Socket.
Key Features:
- Torx Plus Design: Specifically designed for Torx Plus fasteners, which differ from standard Torx fasteners.
- 3/8" Drive: Compatible with standard 3/8-inch drive ratchets and wrenches.
- Durable Construction: Crafted from high-quality metal with a chrome-plated finish for durability and corrosion resistance.
- Milled Exterior: Provides superior grip and handling.
- Versatile Applications: Suitable for common Torx Plus applications such as GM transmission bell housing bolts, Ford seat belt anchors, and Ford pick-up bed bolts.
2. What's in the Box
Your Lisle 81090 TP50 Torx Plus Bit Socket package includes:
- 1 x TP50 Torx Plus Bit Socket
3. Setup
The Lisle 81090 TP50 Torx Plus Bit Socket is designed for straightforward integration into your existing toolset.
- Select Appropriate Drive Tool: Ensure you have a 3/8-inch drive ratchet, breaker bar, or torque wrench.
- Attach the Socket: Firmly push the square drive end of the Lisle 81090 socket onto the corresponding square drive of your chosen tool until it clicks securely into place.
- Verify Connection: Gently pull on the socket to ensure it is properly seated and will not detach during use.
Video 1: Product Overview demonstrating the socket's design and ease of attachment.
4. Operating Instructions
This Torx Plus bit socket is specifically for fasteners with a Torx Plus profile. It will not fit standard Torx fasteners.
- Identify Fastener Type: Confirm that the fastener you intend to work with is a TP50 Torx Plus type.
- Insert the Bit: Carefully insert the Torx Plus bit end of the socket into the fastener head, ensuring a snug fit.
- Apply Force:
- For loosening: Apply steady, counter-clockwise force.
- For tightening: Apply steady, clockwise force.
- Torque Specifications: Always refer to the vehicle or equipment manufacturer's specifications for the correct torque values when tightening fasteners. Using a torque wrench is recommended for critical applications.
- Common Applications: This socket is commonly used for:
- GM transmission bell housing bolts.
- Ford seat belt anchors.
- Ford pick-up bed bolts.
Important: Do not use an impact gun on fasteners that have never been removed before, especially for bell housing bolts. Use a breaker bar first to prevent damage to the bolts or the tool.
5. Maintenance
Proper maintenance will extend the life of your Lisle 81090 TP50 Torx Plus Bit Socket.
- Cleaning: After each use, wipe the socket clean with a dry cloth to remove any dirt, grease, or debris. For stubborn grime, a mild degreaser can be used, followed by thorough drying.
- Storage: Store the socket in a dry environment, away from moisture and corrosive chemicals, to prevent rust and degradation. A tool tray or box is ideal for protection.
- Inspection: Periodically inspect the bit for any signs of wear, cracks, or deformation. Discontinue use if any damage is observed to prevent injury or further damage to fasteners.
6. Troubleshooting
While the Lisle 81090 TP50 Torx Plus Bit Socket is designed for durability, proper usage is crucial to prevent damage.
Issue: Bit tip appears chipped or broken.
Possible Causes:
- Incorrect Fastener Type: Attempting to use the Torx Plus bit on a standard Torx fastener or a fastener of a different size/profile.
- Excessive Force/Impact: Applying excessive torque beyond the tool's capacity or using an impact wrench on extremely tight or seized fasteners without proper initial loosening.
- Misalignment: Not fully seating the bit into the fastener head before applying force, leading to uneven stress distribution.
- Seized Fasteners: Fasteners that are corroded or excessively tight can put extreme stress on the tool.
Solutions & Prevention:
- Verify Fastener: Always double-check that the fastener is indeed a TP50 Torx Plus.
- Gradual Force: For very tight fasteners, apply gradual, steady force. Consider using penetrating oil on seized bolts.
- Avoid Impact on Seized Bolts: As noted in operating instructions, for fasteners that have never been removed, especially bell housing bolts, use a breaker bar first to initiate movement before applying higher torque.
- Proper Seating: Ensure the bit is fully and squarely engaged with the fastener head before applying any rotational force.
7. Specifications
| Attribute | Detail |
|---|---|
| Brand | Lisle |
| Model Number | 81090 |
| Model Name | TP50 Torx Plus Bit Socket |
| Item Length | 3.5 Inches |
| Material | Metal |
| Drive System | Torx Plus |
| Finish Type | Chrome-plated |
| Number of Pieces | 1 |
| Drive Bit Shank Style | Hex |
| UPC | 083045810902 |
| Bit Compatibilities | Torx Plus |
| Manufacturer | Lisle |
| Item Weight | 0.32 ounces |
| Country of Origin | USA |
| ASIN | B009TC6O00 |
8. Warranty and Support
For information regarding warranty coverage, product support, or to contact customer service, please refer to the official Lisle Corporation website or the product packaging. Keep your purchase receipt for warranty claims.
Lisle Corporation Official Website: www.lislecorp.com
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