Expansion-Type Fasteners Expansion Nut

Expansion-Type Speed Nut Fasteners
provide fast, vibration-resistant attachments in blind or center- panel locations where only one side is accessible. They snap easily into square or round holes and are self retained by spring legs. Special locking tabs are provided where permanent fastener retention is desired.

As the screw is driven, it expands the spring legs, locking them over the panel thickness and at the same time providing a double-locking action on the screw. These easy to apply fasteners require no special sills or equipment to insall, can be used in place of weld-, clinch- or stake-type fasteners. Applied before or after painting, they will not clog - do not require masking. And, they can be safely applied after procelainizing.
Expansion-Type Fasteners


The Dimensions of the parts listed are envelope dimensions only. For complete design information, please contact us.

Metric parts listed in italic

  Part Number Screw Size P Panel
A Length B Width E Height J Width
of Spring
G Panel
T Matl.
  C10493-6A 6A .045-.065 E .400 .320 .260 .240 .290-.296 .025
  C9636SS-8A 8A .045-.063 D .380 .280 .200 .250 .261-.281 Sq. .020
  D98363-8Z 8B .094-.114 BD .626 .319 .289 .320 .341 Sq. .025
  C70825-10AB 10AB .075-.105 AB .570 .420 .285 .570 .398-.531 Sq. .020
  C8653-10A 10A .036-.056 C .570 .530 .350 .270 .503-.508 Sq. .022
  D98307-10Z 10B .118-.147 BD .500 .321 .268 .225 .365-.385 Sq. .025
  C15872-14A 14A .035-.045 F .752 .500 .721 .250 .370-.380 Sq. .031


Material: All parts are Spring Steel, heat treated, unless otherwise specified. The only variations available are those shown with suffix letters in the part number.

  • SS - Stainless Steel
  • BE - Beryllium Copper
  • P - Phosphor Bronze