Professional-grade 1/4" drive ratchet adaptor with locking pin system for FOD/FME compliance. Features nickel-chrome plating, knurled grip surfaces, and positive retention design for aerospace and aviation applications.
The Snap-on Tools@Height 1/4" Drive 20-Tooth Ratchet Adaptor (Model THTM77) is a precision-engineered tool designed for professional technicians requiring FOD (Foreign Object Debris) and FME (Foreign Material Exclusion) compliance in aerospace, aviation, and high-security environments. This ratchet adaptor features an innovative locking pin system that mates with the side lock hole on Tools@Height sockets, extensions, and adaptors, ensuring positive retention and preventing accidental disengagement. The adaptor measures 1-5/8 inches in overall length and weighs just 0.12 pounds, making it ideal for work at height and confined spaces where tool control is critical.
Engineered with dual functionality and safety as paramount concerns, this adaptor features 1/4" drive male and female ends with knurled surfaces for secure finger tightening and removal without slipping. The nickel-chrome plating provides excellent corrosion resistance and makes cleaning effortless, extending the tool's service life in harsh environments. The locking hole and pin combination reduces the risk of misaligning the socket, adaptor, or extension onto the drive tool, addressing critical safety concerns in aerospace and military applications. This tool is FOD-compliant and delivered ready-to-use, eliminating the need for additional modifications or setup.
Snap-on's Tools@Height system represents the industry standard for tethered tool solutions, with attachment points specifically engineered to not interfere with tool functionality. The ratchet adaptor is compatible with the complete Tools@Height ecosystem of sockets, extensions, and specialized torque adaptors. This product is backed by Snap-on's reputation for quality and reliability, making it an essential component for professional maintenance operations in aviation, aerospace, military, and defense industries.
Key Features
- Locking pin system mates with side lock hole for positive retention and prevents accidental disengagement
- Reduces risk of misaligning socket, adaptor, or extension onto drive tool
- 1/4" drive male/female ends with knurled surface for secure finger tightening and removal
- Nickel-chrome plating provides corrosion resistance and easy cleaning
- FOD-compliant and ready-to-use for aerospace, aviation, and military applications
- Engineered attachment points do not interfere with tool functionality
- Locking hole on all four sides for versatile orientation
- Lightweight design at 0.12 pounds ideal for work at height
Technical Specifications
| Specification |
Value |
| Drive Size | 1/4 inch |
| Overall Length | 1-5/8 inches |
| Weight | 0.12 pounds (0.05 kilograms) |
| Type | Ratcheting Adaptor |
| Drive Configuration | Male/Female with knurled surface |
| Plating | Nickel-Chrome |
| Locking System | Pin-and-hole retention system on all four sides |
| Compliance | FOD (Foreign Object Debris) and FME (Foreign Material Exclusion) compliant |
| Tooth Count | 20 teeth |
| Repair Kit | Not available |
