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FRANGIBOLT
PRODUCTS


Actuator
FC6-32-7SR2


Actuator
FC4-24-10SR2


Actuator
FC3-20-16SR2


Actuator
FC2-16-31SR2


Frangibolt
Washers


Frangibolt
Fasteners


Frangibolt
Lock Nuts


Compression
Fixture


Frangibolt
Switch-Washer


Frangibolt
Enclosures


Frangibolt
Application
Examples



Frangibolt® Locknuts

The MS21043 series locknuts shown on this page have been widely used with the Frangibolt release mechanism.  They offer the following key features: 
  • They are made from high strength A286 stainless steel with a minimum tensile strength of 125 ksi.
  • They are silver plated to reduce friction and minimize galling.
  • They have a locking feature in the form of a deformity in the thread. 

Note that not all Frangibolt designs require a nut as many thread directly into a flange or structure.  In this case, it is important that the threaded connection be designed to withstand the tensile strength of the notched Frangibolt (See Frangibolt Fasteners)


MS21043 Locknuts


Specifications

Part No.

Thread Size

Target Preload

Torque*

MS21043-08

8-32

400 lb

13 in-lb

MS21043-3

10-32

800 lb

25 in-lb

MS21043-4

1/4-28

1500 lb

65 in-lb

MS21043-6

3/8-24

3000 lb

200 in-lb

 
*Torque specification is maximum recommended and above running. 
  



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