Product Description
The S-440-0ZI is a threaded fastener designed for easy installation into ductile steel and aluminum panels. It features a unique clinching profile: when the nut is pressed into a round hole, the host sheet material is forced to cold-flow into an undercut, locking the fastener securely in place. A serrated clinching ring provides high torque-out resistance, ensuring the nut remains stationary even under significant rotational force.
The "0" shank code indicates that this specific model is optimized for the thinnest compatible sheets, while the "ZI" suffix denotes a clear trivalent zinc plating, providing corrosion resistance in a RoHS-compliant finish.
Permanent Hardware: Eliminates the need for loose nuts and washers, simplifying downstream assembly.
Compact Design: Low profile and small "centerline-to-edge" requirements allow for high-density component placement on chassis.
Reliable Retention: Provides superior pull-out and torque-out compared to alternative fastening methods like sheet metal screws or rivets.
Product Specs
- SKU:
- S-440-0ZI
- Manufacturer:
- PennEngineering® (PEM®)
- Part Number:
- S-440-0ZI
- Thread Size:
- #4-40 (.112-40)
- Thread Specification:
- Unified Class 2B, ASME B1.1
- Material:
- Heat-Treated Carbon Steel
- Finish:
- Zinc plated (5µm), Type III, Colorless (ZI)
- Shank Code:
- 0
- Min. Sheet Thickness:
- .030 in (0.8 mm)
- Hole Size in Sheet:
- .166 in (+.003 -.000) / 4.22 mm
- C Max. (Body Diameter):
- .165 in (4.19 mm)
- E ± .010 (Flange Diameter):
- .250 in (6.35 mm)
- T ± .010 (Nut Thickness):
- .060 in (1.52 mm)
- Max. Sheet Hardness:
- HRB 80 / HB 150 (on Brinell scale)
- Min. Dist. Hole C/L to Edge:
- .19 in (4.8 mm)
