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The ITW Shakeproof BosScrew™ is the only screw for plastics that is designed not to loosen. Its unique thread form, designed with the patented WERCS® technology, works directly with the creeping aspect of plastic to interlock with the boss. The BosScrew™ utilizes standard head diameters and has the highest drive-to-strip ratio in the industry. This is the maximum performance fastener for most plastic applications. Time, temperature, and vibration only strengthen the joint.
Advantages:
- Reduce parts in an assembly; no more inserts
- Permits the design of shorter bosses-save material
- No spring components needed in the joint
- Savings in service issues due to fasteners
Available Features:
- SEMS - add a washer under the head to span larger holes, protect fragile surfaces, and distribute load.
WERCS® Technology:
- ITW’s new WERCS® Technology is revolutionizing the design and manufacturing of threaded products. This technology allows the formation of unique geometries on the thread. Utilizing the WERCS® Technology, ITW has developed a suite or platform of innovative threaded products — products designed to dramatically advance fastening performance, increase manufacturing efficiency and reduce overall installed cost.
| Typical Mean Pilot Hole | ||
| Screw Size | Inches (in.) | Millimeters (mm) |
| #4 | 0.090 | 2.30 |
| M3 | 0,093 | 2.37 |
| #6 | 0.122 | 3.10 |
| M3.5 | 0.122 | 3.10 |
| #8 | 0.132 | 3.36 |
| #10 | 0.154 | 3.92 |
| M4 | 0.132 | 3.50 |
| M5 | 0.154 | 3.90 |
| M5.7 | 0.170 | 4.32 |
| M6 | 0.186 | 4.80 |
| 1/4 | 0.210 | 5.33 |
| M6.3 | 0.209 | 5.31 |
| M8 | 0.248 | 6.30 |
| 5/16 | 0.265 | 6.73 |
| 3/8 | 0.286 | 7.27 |
* Approved recommendations with Acetal Nylon ABS and PBT or equivilant materials