10 pcs 1/4-28x2D Please google these and check them out before buying. These have a different type of installer. I think.
| Brand | HELICOIL/STANLEY |
| Finish | Plain |
| Free Coil Diameter (Max.) | 0.326in |
| Free Coil Diameter (Min.) | 0.306in |
| Insert Length | 0.500in |
| Material | 304 Stainless Steel |
| No. of Sides per Grip Coil | 5 |
| Nominal Diameter | 0.250in |
| Number of Coils | 11 3/8 |
| Number of Coils From End Insert | 5 11/16 |
| Number of Grip Coils | 1 | | Packaging | Bulk | | RoHS | Compliant | | Thread Size | 1/4-28 | | Thread Type | Unified Fine Thread (UNF) | | Type | Screw-lock Inserts (internal-lock) | | Units | Inch |
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