Spiralock inserts are made of cold-rolled Type 304 stainless steel wire (AS7245), work-hardened to a tensile strength above 200,000 psi, having a hardness of Rc43-50. The finished surface (8-16 micro inches) is exceedingly smooth, virtually eliminating friction-induced thread erosion.
FEATURES:

• Threads into (Screw Thread Insert) STI holes per NASM33537
• Accepts standard 2A/3A bolts (4g6g and 6g)
• Spiralock insert meets or exceeds the applicable parts of NASM8846, e.g. the wire tensile strength, chemical composition, and methods of inspection
• Spiralock insert is not a prevailing torque-type screw-locking insert—no risk of galling or seizing of bolt and insert
• Similar to NASM1130 inserts
• Provides proven superior vibration resistance to standard locking inserts