SkyLoc QL8C62 Kee'd Threaded Receptacle
Self-Locking Insert | Quad-Lead Thread | Seven-Piece Assembly | NSN 5325-00-761-6222
Technical Overview
The QL8C62 Kee'd threaded receptacle is a precision seven-piece self-locking insert assembly engineered for fastening systems requiring positive locking capability. The assembly features a 303 stainless steel threaded barrel with 1/2-13 UNC internal mounting threads and .1640-32 quad-lead cam groove for stud engagement. Internal components include dual spring-loaded cam assemblies, nested 17-7 PH stainless steel compression springs, and four 304 stainless steel Kee retention tabs. This design provides self-locking capability through the Kee tab mechanism while maintaining rapid quarter-turn installation and removal. The receptacle is secured with 1/2-13 UNC threads for installation into tapped holes or mounting plates.
Specifications
| Thread Size - Stud Interface: |
.1640-32 Quad-Lead (internal cam groove) |
| Thread Size - Mounting: |
1/2-13 UNC-2A (modified minor diameter .438") |
| Receptacle Type: |
Kee'd Threaded Insert (Self-Locking) |
| Assembly Components: |
7 pieces (barrel, upper cam, lower cam, 2 springs, stud, 4 Kee tabs) |
| Barrel Material: |
303 Stainless Steel (ASTM A582), Passivated per AMS 2700 |
| Upper Cam Material: |
Metalic, Black Oxide per MIL-DTL-13924 Class 1 |
| Lower Cam Material: |
304 Stainless Steel (ASTM B853), Passivated per AMS 2700 |
| Spring Materials: |
17-7 PH Stainless Steel (ASTM A313), Passivated per AMS 2700 |
| Kee Tab Material: |
304 Stainless Steel (ASTM A276), Passivated per AMS 2700 |
| Overall Diameter: |
.382" |
| Overall Height: |
.550" |
| NSN Number: |
5325-00-761-6222 |
| Compatible Systems: |
QL8C Series Studs |
| Equivalent Part Number: |
CA18062 |
| Compliance: |
AS9100D Certified, CAGE Code 435Z0 |
Applications
- Aerospace: Flight-critical panels, engine cowlings, inspection access doors requiring positive locking to prevent inadvertent opening
- Motorsport: High-vibration applications, safety-critical bodywork, underbody panels requiring self-locking capability
- Industrial: Equipment access panels, control enclosures in high-vibration environments requiring positive locking
- Marine: Deck hatches, structural panels in corrosive environments requiring self-locking quarter-turn fastening
- Defense: Military aircraft structural panels (NSN 5325-00-761-6222), ground support equipment requiring MIL-SPEC self-locking receptacles
Complete System Components
| Component | Part Number | Description |
| Stud |
QL8C21-XPH |
Pan head stud, slotted (select dash number for grip) |
| Receptacle Options |
QL8C62 |
Kee'd threaded insert, self-locking (NSN 5325-00-761-6222) (this product) |
| QL8C64 Series |
Threaded receptacle for tapped installations |
| QL8C66 Series |
Caged floating receptacle for radial float applications |
| Retainer |
QL8C61 |
Spring retainer for loose panel applications |
| Grommet |
QL8C63 Series |
Load distribution and panel protection |
Key Features
- Self-Locking Design: Four 304 stainless steel Kee tabs provide positive locking to prevent inadvertent opening from vibration or shock loads
- Seven-Piece Assembly: Precision-engineered components work together to provide reliable quarter-turn operation with self-locking capability
- Dual Cam System: Upper and lower cam assemblies with nested compression springs ensure consistent engagement and locking force
- Quad-Lead Thread: Four-start internal cam groove allows 90-degree rotation for rapid quarter-turn fastening
- Corrosion-Resistant Materials: 303 and 304 stainless steel construction with passivation provides long-term durability in harsh environments
- 1/2-13 UNC Mounting: Standard coarse thread for secure installation into tapped holes or mounting plates
- Military NSN: NSN 5325-00-761-6222 for defense procurement and logistics
- Industry Standard Interchange: Compatible with CA18062 receptacles
📏 Installation Guide: The QL8C62 Kee'd receptacle requires a tapped 1/2-13 UNC hole for installation. The self-locking Kee tabs engage automatically during stud rotation, providing positive locking without additional hardware. Ensure proper thread engagement depth and torque specification for secure mounting. This receptacle is ideal for applications requiring positive locking to prevent inadvertent opening in high-vibration or safety-critical installations.
Quality & Compliance
Manufactured by Skybolt Aerospace Fasteners under AS9100D certification at our Leesburg, Florida facility (CAGE Code: 435Z0). All QL8C62 receptacle assemblies are 100% inspected to drawing specifications and include full material traceability. Materials conform to ASTM A582 for 303 stainless steel, ASTM B853 for 304 stainless steel, and ASTM A313 for 17-7 PH spring steel. Black oxide finish on upper cam meets MIL-DTL-13924 Class 1 requirements. Assembly is qualified to NSN 5325-00-761-6222 for military and defense applications.
Tridair® is a registered trademark of Howmet Aerospace, Inc. or its subsidiaries. Skybolt products are compatible alternatives and are not manufactured by or affiliated with Howmet Aerospace.
