MB Series: Molded-In Blind Threaded Inserts for Plastics
Our MB Series threaded insert is designed to be molded into the plastic component during the molding cycle. Typically, the insert is placed on a core pin in the mold during the molding cycle. The insert is designed with aggressive knurling and undercuts to resist rotational and tensile pull loads. The part has a closed bottom (blind thread) to eliminate plastic flow into the threads. Although our catalog insert is brass, this product can also be manufactured in stainless steel, steel and aluminum.
Note: The manufacturing process may leave a small cut-off nib on the closed end.
| MOLD-IN BLIND THREADED INSERTS | ||||||||||
| INCH | METRIC | A ±.005 |
B ±.004 |
C ±.004 |
D ±.005 |
Min. Full Thread |
||||
| Thread Size |
Part Number |
Thread Size |
Part Number |
|||||||
| 2-56 | 256X156MB | – | – | .156 | .156 | .142 | 030 | 4 | ||
| 256X219MB | – | .156 | .219 | .142 | 030 | 6 | ||||
| 4-40 | 440X205MB | M3.0 x 0.5 | M30X205MB | .188 | .205 | .171 | .030 | 4 | ||
| 440X281MB | – | .188 | .281 | .171 | .030 | 6 | ||||
| 440X344MB | M30X344MB | .188 | .344 | .171 | .030 | 8 | ||||
| 6-32 | 632X250MB | M3.5 x 0.6 | – | .219 | .250 | .202 | .060 | 4 | ||
| 632X344MB | – | .219 | .344 | .202 | .060 | 6 | ||||
| 632X469MB | – | .219 | .469 | .202 | .060 | 10 | ||||
| 8-32 | 832X469MB | M4.0 x 0.7 | M40X469MB† | .250 | .469 | .226 | .060 | 10 | ||
| – | – | .250 | .226 | .060 | ||||||
| – | – | .250 | .226 | .060 | ||||||
| 10-24 | 1024X438MB | M5.0 x 0.8 | – | .281 | .438 | .259 | .060 | 6 | ||
| 1024X531MB | – | .281 | .531 | .259 | .060 | 8 | ||||
| 1024X750MB | – | .281 | .750 | .259 | .060 | 12 | ||||
| 10-32 | 1032X281MB | M5.0 x 0.8 | – | .281 | .281 | .259 | .060 | 4 | ||
| 1032X438MB | – | .281 | .438 | .259 | .060 | 6 | ||||
| 1032X531MB | M50X531MB | .281 | .531 | .259 | .060 | 8 | ||||
| 1/4-20 | 2520X531MB | M6.0 x 1.0 | M60X531MB | .344 | .531 | .321 | .090 | 6 | ||
| 2520X625MB† | M60X625MB† | .344 | .625 | .321 | .090 | 8 | ||||
| 1/4-28 | – | – | – | .344 | .321 | .090 | ||||
| 2528X625MB† | .344 | .625 | .321 | .090 | 12 | |||||
| 5/16-18 | 3118X719MB | M8.0 x 1.25 | – | .438 | .719 | .404 | .094 | 8 | ||
| – | – | .438 | .404 | .094 | ||||||
| 5/16-24 | 3124X719MB† | – | – | .438 | .719 | .404 | .094 | 10 | ||
| – | .438 | .404 | .094 | |||||||
| 3/8-16 | 3816X812MB | – | – | .500 | .812 | .466 | .094 | 8 | ||
| 3816X890MB† | .500 | .890 | .466 | .094 | 9 | |||||
| 3/8-24 | – | – | – | .500 | .466 | .094 | ||||
| – | .500 | .466 | .094 | |||||||
† Non-Stocking Item – Minimum Order May Apply
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