EFC International
EFC International
1940 Craigshire St. Louis,
MO 63146-4008
Phone: 1 314.434.28881
Contact: www.efc-intl.com/contact
Website: www.efc-intl.com
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S-Type Captive Threaded Stud Inserts function like the Knurled Blind Threaded Inserts, but leave a threaded stud protruding from the panel after installation. Components can then be attached and secured by a mating nut. These studs can be used in place of clinch or weld studs, before or after finish. Optional head designs include a weathertight PVC foam sealed head, or a wedged head for more torque capabilities. As these are installed, the knurled body expands 360º to fill the hole, creating exceptional torque strength and resistance to vibration. A backside flange is also formed, even in multiple thicknesses of materials without any need for adjustments.
Unit of Measure

Specifications

Shell Material

 N/A 1010/1008 Steel

Stud Material

 N/A 1038 Steel

Thread Size

 N/A 1/4-20

Head Height

 N/A 0.030 in

Mounting Hole Diameter

 N/A 0.390 in

Head Outside Diameter

 N/A 0.5 in

Maximum Dimension D

 N/A 0.390 in

Grip Call Out

 N/A 165

Thread Call Out

 N/A 420

Maximum Dimension Il

 N/A 0.465 in

Length

 N/A 0.670 in

Grip Range

 N/A 0.027 to 0.165 in

Matfin

 N/A S4

Stud Length

 N/A 0.625 in

Weight

 N/A 28.91 lb

Finish

 N/A Zinc/Yellow Dichromate per ASTM-B-633 Type II Fe/Zn (0.0003/8u) with Clear Coating

Features and Benefits

Features and Benefits

 N/A
  • Protruding Stud holds component parts until final assembly
  • Exceptional Torque Strength 360º hole fill
  • Quality Installation even in variable thickness material is assured with special tools available directly from EFC International
  • No Paint Masking - can be installed after painting
  • Corrosion Resistance - standard zinc/yellow dichromate finish (96 hrs. salt spray to white corrosion). Other finishes are available upon request.
  • Weathertight - Optional PVC Foam Seal under the head
  • Wedged Head increases torque capability, especially in soft or thin materials is ideal for electrical grounding applications.
For information on corresponding pneumatic or hydraulic tools available, please contact EFC International.

Additional Information

Additional Information

 N/A These inserts are to be used with Grade 5 or Metric 8.8/9.8 non thread-locking type nuts. Most sizes are available in Standard, Sealed and Wedged head features. Sizes listed on this page are a representative sampling of materials and finishes.

Tolerances:
Hole Size: +0.006 -0.000in (+0.15 -0.00mm) (HD) - ±0.010in (±0.25mm) (HH) - ±0.003in (±0.08mm) (L) - ±0.020in (±0.50mm)

Note

Note

 N/A Please contact EFC International for sizes, materials or designs not shown.

Grip Range can be affected by parent material density and actual hole size. Trial Installations are recommended to determine optimum grip.