ITW Shakeproof industrial

BOSSCREW™ FASTENERS

The ITW Shakeproof BosScrew™ is the only screw engineered to not loosen in plastic applications. 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.

  • Best-in-class removal torque
  • Dramatically advances fastening performance
  • Increases manufacturing efficiency
  • Reduces overall installed cost

The BosScrew™ Benefit:

  • Reduces assembly components – no more inserts
  • Permits the design of shorter bosses – saves material
  • No spring components needed in the joint
  • Savings in service issues due to fasteners
  • Available in a variety of sizes and head styles
Shakeproof Head designs

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.
Bosscrew image 1
Bosscrew calculations
bosscrew advantage
bosscrew performance

MAXIMIZED DRIVE-STRIP WINDOW

BosScrew is the maximum performance fastener for most plastic applications. The unique thread geometry prevents slipping for the largest drive-strip in the industry.

 Typical Mean Pilot Hole 
Screw SizeInches (in.)Millimeters (mm)
#40.092.3
M30,0932.37
#60.1223.1
M3.50.1223.1
#80.1323.36
#100.1543.92
M40.1323.5
M50.1543.9
M5.70.174.32
M60.1864.8
1/40.215.33
M6.30.2095.31
M80.2486.3
5/160.2656.73
3/80.2867.27

* Approved recommendations with Acetal Nylon ABS and PBT or equivilant materials