PreciSert Miniature 4-40 Non-Locking
PreciSert Miniature 4-40 non-locking key-locking insert, part no. MSS1830-102, stainless steel to MIL-I-45914 military standard, external thread 10-32 UNF, shear engagement 0302in, installation tool LDS-04.
| Features | Military-spec key-locked anti-rotation |
|---|---|
| Thread Diameter | 4-40 |
| Thread Standard | Inch unified thread |
| Material | Stainless steel (300 series) |
| Finish | Passivated |
| Environmental Compliance | REACH and RoHS compliant |
| Military Standard | MIL-I-45914 Rev A |
Overview
This insert family provides a durable internal thread in a material that cannot hold one on its own, either because the parent alloy is softer than the working screw or because the thread will be opened many times over the equipment life. The insert is installed into a prepared hole and becomes the load-bearing thread, so wear and repair happen at the insert rather than in the housing. This listing: thread 4-40, standard Inch unified thread, material Stainless steel (300 series), finish Passivated.
What sets this listing apart: Thread Diameter 4-40 (series runs 2-56 to 8-32).
Advantages
Thread life is transferred from the parent material to a hardened or stainless insert, which is the difference between a housing that survives ten service cycles and one that is scrapped after three.
Pull-out strength scales with engaged length, so insert length — not thread diameter — is the parameter to increase when a joint pulls out under load.
The installed thread can be renewed or replaced without welding, so a single damaged hole does not condemn an entire casting.
Applications
Die-cast and machined housings that must accept repeated assembly, repair of stripped threads, and joints where the parent alloy is softer than the mating screw.
State the parent material and the required pull-out load when ordering: hole size, insert length and locking method all follow from those two numbers, not from thread size alone.
Product information is supplied by Toprecision. Custom parts can be produced to drawing — contact us for samples or a quotation.
Specifications across this series
8 parts in this series
Values are taken from each part’s own attribute set. Changing length, material or finish changes pull-out strength and installation torque, so compare the row that matches your drawing.
Selection and test data: engagement length, standards, salt-spray hours
FAQ
What are the key dimensions of this part?
Features Military-spec key-locked anti-rotation, Thread Diameter 4-40, Thread Standard Inch unified thread, Material Stainless steel (300 series).
What material and finish is it supplied in?
Stainless steel (300 series); Passivated.
What should I verify before ordering or installing it?
State the parent material and the required pull-out load when ordering: hole size, insert length and locking method all follow from those two numbers, not from thread size alone.