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  • Designed for superior pullout resistance in plastics and thin sheet metal.
  • Pre-bulbed design requires less installation load.
  • Pre-bulbed inserts require less installation load than straight shank and require slightly larger mounting hole size.
  • Other materials available.
NOTE: The Atlas® spin-spin or spin-pull tool can be used to install pre-bulbed inserts. Material hardness will affect the published grip ranges. Trial installations of this product in your application are recommended. We will bemore
Unit of Measure

Thread Size

1/4-20

Grip Range

.020 - .280 in

Identification Mark

None

A ± .015

1.00 in

øB Nom.

.625 in
a1053.jpg

C Nom.

.057 in

øD Max.

.384 in

Hole Size in Sheet + .006 - .000

.390 in

Fastening

Uninstalled

Thread Specification

2B per ASME B1.1

Standard Material

Low Carbon Steel

Standard Finish

RoHS Compliant Zinc Yellow

CAD Supplier

PennEngineering® (Atlas®)