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All Categories > PEM® Brand Fasteners for Metal Sheets and Panels > Captive Panel Screws and Hardware > Heat Sink Mounting System - Types HSCB™, HSR™, HSL™ > HSCB™ Self Captivating Screw > HSCB™ Self Captivating Screw - Unified > Part # HSCB-440-4ZI  
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Part # HSCB-440-4ZI, HSCB™ Self Captivating Screw - Unified


  • Low cost design.
  • Small, compact and low profile design for limited access areas.
  • Two screw lengths.
  • Universal slot/Phillips recess standard.




 Specifications   

Thread Size
.112-40 (#4-40)

Type
HSCB

Thread Code
440

Screw Length Code
4

L ± .015

 View
.320 in

Min. Sheet Thickness
.040 in

Hole Size in Sheet + 0.003 - 0.000
.112 in

Es ± .010
.312 in

H1 Ref.
.300 in

H2 Ref.
.470 in

Ts Min.
.130 in

Driver Size
#1 Phillips

Min. Dist. Hole C/L to Edge
.156 in

Thread Specification1
External ASME B1.1, 2A

Material
Hardened Carbon Steel

Finish
Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless

For Use in Sheet Hardness
HRB 80 or Less (Hardness Rockwell "B" Scale)
HB 150 or Less (Hardness Brinell)

CAD View
Fastened

CAD Supplier
PennEngineering® (PEM®)
1 As with all Class 2A/6g external threads with an additive finish, 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.



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