The SCB™ tool-only, non-spring captive panel screw is a spinning clinch bolt designed for permanent installation into sheet materials up to HRB 80 or HB 150 hardness. It features an external thread conforming to ASME B1.1, 2A, with a #1 Phillips driver and a zinc-plated finish per ASTM B633, SC1 (5µm), colorless. The screw installs into a minimum sheet thickness of 0.040 in and requires a hole size of 0.112 in for the #4-40 thread. Minimum distance from hole centerline to edge is 0.130 in. The fastener provides consistent clamp force and allows removal of the heat sink if needed. Screws, springs, and receptacle nuts are sold separately.
Specifications -
Thread Size - - .112-40 (#4-40)
Type - - Non-Jacking - SCB
Thread Code - - 440
Screw Length Code - - 8
Min. Sheet Thickness - - .040 in
Hole Size in Sheet + 0.003 - 0.000 - - .112 in
E ± .010 - - .250 in
H Nom. - - .080 in
L - Length ± .015 - - .500 in
T Nom. - - .130 in
Nom. Axial Float - - .330 in
Driver Size - - #1 Phillips
Min. Dist. Hole C/L to Edge - - .130 in
Thread Specification1 - - ANSI B1.1, 2A
Material - - Heat-treated Carbon Steel
Finish - - Zinc plated, 5µm, colorless
For Use in Sheet Hardness - - HRB 80 or less (Hardness Rockwell “B” Scale) /HB 150 or less (Hardness Brinell)
1 As with all external plated threads, Class 2A/6g, the maximum major and pitch, after plating, may equal basic sizes and be gauged to Class 3A/4h, per ANSI B1.1, Section 8, Table 3A and ANSI B1.13M, Section 8, Paragraph 8.2.
| PennEngineering® | |
|---|---|
| Product Category | Captive Fasteners |
| Product Number | SCB-440-8-ZI |
| Product Name | Captive Panel Screw-Tool only, Spinning Clinch Bolt, No Spring - Unified |
| Captive Fastener Class / Type | Captive Screws |
| Decimal Thread Diameter | 0.1120 inch (2.84 mm) |
| Unified Thread Notation | Unified |
| Panel Thickness | 0.0400 inch (1.02 mm) |
| Hole Size | 0.1120 inch (2.84 mm) |
