BSL® wire thread inserts are used for threaded fastening of thick plate materials in automobiles. By inserting the wire thread insert into the internal thread hole processed in the thick plate substrate and then fastening it with bolts, the following connection characteristics can be achieved:
1. The substrate can withstand a higher thread holding load;
2. The thread friction coefficient is low, stable and wear-resistant during installation;
3. The corrosion resistance of the connecting parts is enhanced;
4. The installation cost of bolted connections is reduced;
5. It can adapt to installation substrates of various materials (steel, aluminum, etc.).
| Product Code | Wire thread insert thread specifications | Nominal lengthxd | Mounting hole thread depth t2 | Free state number of circles
N |
Length after installation
L |
Free state outer diameter
Dz |
Thread hole diameter
D1HC |
Large diameter of threaded holeDHC | ||||
| Min | Min | Max | Min | Max | Min | Max | Min | Max | Min | |||
| B4040-03-0030 | M3 | 1d | 3 | 3.6 | 4.3 | 2.5 | 2.75 | 3.8 | 4.35 | 3.11 | 3.22 | 3.65 |
| B4040-03-0045 | 1.5d | 4.5 | 6.3 | 7.1 | 4 | 4.25 | ||||||
| B4040-03-0060 | 2d | 6 | 9 | 9.8 | 5.5 | 5.75 | ||||||
| B4040-03-0075 | 2.5d | 7.5 | 11.8 | 12.6 | 7 | 7.25 | ||||||
| B4040-03-0090 | 3d | 9 | 14.5 | 15.3 | 8.5 | 8.75 | ||||||
| B4040-04-0040 | M4 | 1d | 4 | 3.6 | 4.2 | 3.3 | 3.65 | 5.05 | 5.6 | 4.15 | 4.29 | 4.91 |
| B4040-04-0060 | 1.5d | 6 | 6.3 | 6.9 | 5.3 | 5.65 | ||||||
| B4040-04-0080 | 2d | 8 | 9.1 | 9.5 | 7.3 | 7.65 | ||||||
| B4040-04-0100 | 2.5d | 10 | 11.8 | 12.2 | 9.3 | 9.65 | ||||||
| B4040-04-0120 | 3d | 12 | 14.4 | 14.9 | 11.3 | 11.65 | ||||||
| B4040-05-0050 | M5 | 1d | 5 | 4 | 4.7 | 4.2 | 4.6 | 6.25 | 6.8 | 5.17 | 5.33 | 6.04 |
| B4040-05-0075 | 1.5d | 7.5 | 6.8 | 7.6 | 6.7 | 7.1 | ||||||
| B4040-05-0100 | 2d | 10 | 9.6 | 10.6 | 9.2 | 9.6 | ||||||
| B4040-05-0125 | 2.5d | 12.5 | 12.4 | 13.5 | 11.7 | 12.1 | ||||||
| B4040-05-0150 | 3d | 15 | 15.2 | 16.4 | 14.2 | 14.6 | ||||||
| B4040-06-0060 | M6 | 1d | 6 | 3.8 | 4.5 | 5 | 5.5 | 7.58 | 7.95 | 6.22 | 6.41 | 7.3 |
| B4040-06-0090 | 1.5d | 9 | 6.5 | 7.3 | 8 | 8.5 | ||||||
| B4040-06-0120 | 2d | 12 | 9.2 | 10.2 | 11 | 11.5 | ||||||
| B4040-06-0150 | 2.5d | 15 | 12 | 13 | 14 | 14.5 | ||||||
| B4040-06-0180 | 3d | 18 | 14.6 | 15.8 | 17 | 17.5 | ||||||
| B4040-08-0080 | M8 | 1d | 8 | 4.4 | 4.9 | 6.75 | 7.375 | 9.85 | 10.35 | 8.27 | 8.48 | 9.62 |
| B4040-08-0120 | 1.5d | 12 | 7.3 | 8 | 10.75 | 11.375 | ||||||
| B4040-08-0160 | 2d | 16 | 10.3 | 11.1 | 14.75 | 15.375 | ||||||
| B4040-08-0200 | 2.5d | 20 | 13.3 | 14.1 | 18.75 | 19.375 | ||||||
| B4040-08-0240 | 3d | 24 | 16.4 | 17.2 | 22.75 | 23.375 | ||||||
| B4040-08-3080 | M8×1 | 1d | 8 | 5.7 | 6.4 | 7 | 7.5 | 9.7 | 10.25 | 8.27 | 8.48 | 9.62 |
| B4040-08-3120 | 1.5d | 12 | 9.3 | 10.2 | 11 | 11.5 | ||||||
| B4040-08-3160 | 2d | 16 | 12.9 | 14 | 15 | 15.5 | ||||||
| B4040-08-3200 | 2.5d | 20 | 16.5 | 17.7 | 19 | 19.5 | ||||||
| B4040-08-3240 | 3d | 24 | 20.1 | 21.5 | 23 | 23.5 | ||||||
| B4040-10-0100 | M10 | 1d | 10 | 4.7 | 5.2 | 8.5 | 9.25 | 12.1 | 12.8 | 10.32 | 10.56 | 11.95 |
| B4040-10-0150 | 1.5d | 15 | 7.8 | 8.4 | 13.5 | 14.25 | ||||||
| B4040-10-0200 | 2d | 20 | 11 | 11.6 | 18.5 | 19.25 | ||||||
| B4040-10-0250 | 2.5d | 25 | 14.2 | 14.8 | 23.5 | 24.25 | ||||||
| B4040-10-0300 | 3d | 30 | 17.3 | 18 | 28.5 | 29.25 | ||||||
| B4040-10-9100 | M10×1.25 | 1d | 10 | 5.7 | 6.4 | 8.75 | 9.38 | 11.87 | 12.65 | 10.32 | 10.56 | 11.95 |
| B4040-10-9150 | 1.5d | 15 | 9.3 | 10.2 | 13.75 | 14.38 | ||||||
| B4040-10-9200 | 2d | 20 | 12.9 | 14 | 18.75 | 19.38 | ||||||
| B4040-10-9250 | 2.5d | 25 | 16.6 | 17.8 | 23.75 | 24.38 | ||||||
| B4040-10-9300 | 3d | 30 | 20.2 | 21.6 | 28.75 | 29.38 | ||||||
| B4040-10-3100 | M10×1 | 1d | 10 | 7.6 | 7.8 | 9 | 9.5 | 11.68 | 12.65 | 10.32 | 10.56 | 11.95 |
| B4040-10-3150 | 1.5d | 15 | 12.1 | 12.3 | 14 | 14.5 | ||||||
| B4040-10-3200 | 2d | 20 | 16.3 | 16.8 | 19 | 19.5 | ||||||
| B4040-10-3250 | 2.5d | 25 | 20.7 | 21.3 | 24 | 24.5 | ||||||
| B4040-10-3300 | 3d | 30 | 25.3 | 25.8 | 29 | 29.5 | ||||||
| B4040-12-0120 | M12 | 1d | 12 | 4.8 | 5.4 | 10.25 | 11.125 | 14.5 | 15 | 12.38 | 12.64 | 14.27 |
| B4040-12-0180 | 1.5d | 18 | 8.1 | 8.7 | 16.25 | 17.125 | ||||||
| B4040-12-0240 | 2d | 24 | 11.3 | 12 | 22.25 | 23.125 | ||||||
| B4040-12-0300 | 2.5d | 30 | 14.6 | 15.3 | 28.25 | 29.125 | ||||||
| B4040-12-0360 | 3d | 36 | 17.8 | 18.6 | 34.25 | 35.125 | ||||||
| B4040-12-4120 | M12×1.5 | 1d | 12 | 6.2 | 6.7 | 10.5 | 11.25 | 14.4 | 15 | 12.38 | 12.64 | 14.27 |
| B4040-12-4180 | 1.5d | 18 | 9.8 | 10.2 | 16.5 | 17.25 | ||||||
| B4040-12-4240 | 2d | 24 | 13.5 | 14 | 22.5 | 23.25 | ||||||
| B4040-12-4300 | 2.5d | 30 | 15.7 | 16.2 | 28.5 | 29.25 | ||||||
| B4040-12-4360 | 3d | 36 | 20.7 | 21.1 | 34.5 | 35.25 | ||||||
| B4040-12-9120 | M12×1.25 | 1d | 12 | 7.1 | 7.9 | 10.75 | 11.375 | 14.27 | 15 | 12.38 | 12.64 | 14.27 |
| B4040-12-9180 | 1.5d | 18 | 11.5 | 12.5 | 16.75 | 17.375 | ||||||
| B4040-12-9240 | 2d | 24 | 15.8 | 17 | 22.5 | 23.375 | ||||||
| B4040-12-9300 | 2.5d | 30 | 20.2 | 21.6 | 28.75 | 29.375 | ||||||
| B4040-12-9360 | 3d | 36 | 24.5 | 26.1 | 34.75 | 35.375 | ||||||
| B4040-12-3120 | M12×1 | 1d | 12 | 9.3 | 9.7 | 11 | 11.5 | 14.18 | 15 | 12.38 | 12.64 | 14.27 |
| B4040-12-3180 | 1.5d | 18 | 14.5 | 14.9 | 17 | 17.5 | ||||||
| B4040-12-3240 | 2d | 24 | 19.5 | 19.9 | 23 | 23.5 | ||||||
| B4040-12-3300 | 2.5d | 30 | 25.1 | 25.6 | 29 | 29.5 | ||||||
| B4040-12-3360 | 3d | 36 | 30.5 | 30.9 | 35 | 35.5 | ||||||
| B4040-14-0140 | M14 | 1d | 14 | 4.9 | 5.5 | 12 | 13 | 16.87 | 17.87 | 14.43 | 14.73 | 16.6 |
| B4040-14-0210 | 1.5d | 21 | 8.3 | 8.9 | 19 | 20 | ||||||
| B4040-14-0280 | 2d | 28 | 11.6 | 12.3 | 26 | 27 | ||||||
| B4040-14-0350 | 2.5d | 35 | 14.9 | 15.6 | 33 | 34 | ||||||
| B4040-14-0420 | 3d | 42 | 18.2 | 19 | 40 | 41 | ||||||
| B4040-14-4140 | M14×1.5 | 1d | 14 | 6.9 | 7.7 | 12.5 | 13.25 | 16.52 | 17.7 | 14.43 | 14.73 | 16.6 |
| B4040-14-4210 | 1.5d | 21 | 11.1 | 12.1 | 19.5 | 20.25 | ||||||
| B4040-14-4280 | 2d | 28 | 15.4 | 16.5 | 26.5 | 27.25 | ||||||
| B4040-14-4350 | 2.5d | 35 | 19.6 | 20.9 | 33.5 | 34.25 | ||||||
| B4040-14-4420 | 3d | 42 | 23.8 | 25.3 | 40.5 | 41.25 | ||||||
| B4040-14-9140 | M14×1.25 | 1d | 14 | 9.4 | 10.6 | 13.2 | 15.2 | 16.45 | 17.7 | 14.43 | 14.73 | 16.6 |
| B4040-16-0160 | M16 | 1d | 16 | 6 | 6.5 | 14 | 15 | 18.87 | 19.9 | 16.43 | 16.73 | 18.6 |
| B4040-16-0240 | 1.5d | 24 | 9.8 | 10.3 | 22 | 23 | ||||||
| B4040-16-0320 | 2d | 32 | 13.6 | 14.2 | 30 | 31 | ||||||
| B4040-16-0400 | 2.5d | 40 | 17.4 | 18 | 38 | 39 | ||||||
| B4040-16-0480 | 3d | 48 | 21 | 21.9 | 46 | 47 | ||||||
| B4040-16-4160 | M16×1.5 | 1d | 16 | 8.1 | 8.9 | 14.5 | 15.25 | 18.52 | 19.9 | 16.43 | 16.73 | 18.6 |
| B4040-16-4240 | 1.5d | 24 | 13 | 14 | 22.5 | 23.25 | ||||||
| B4040-16-4320 | 2d | 32 | 17.8 | 19 | 30.5 | 31.25 | ||||||
| B4040-16-4400 | 2.5d | 40 | 22.6 | 24.1 | 38.5 | 39.25 | ||||||
| B4040-16-4480 | 3d | 48 | 27.5 | 29.1 | 4650 | 47.25 | ||||||
| B4040-18-0180 | M18 | 1d | 18 | 5.2 | 6.1 | 15.5 | 16.75 | 21.4 | 22 | 18.54 | 18.9 | 21.25 |
| B4040-18-0270 | 1.5d | 27 | 8.6 | 9.5 | 24.5 | 25.75 | ||||||
| B4040-18-0360 | 2d | 36 | 12.1 | 13 | 33.5 | 34.75 | ||||||
| B4040-18-0450 | 2.5d | 45 | 15.5 | 16.5 | 42.5 | 43.75 | ||||||
| B4040-18-0540 | 3d | 54 | 18.9 | 20 | 51.5 | 52.75 | ||||||
| B4040-18-5180 | M18×2 | 1d | 18 | 7.1 | 7.5 | 16 | 17 | 21.07 | 22 | 18.54 | 18.9 | 21.25 |
| B4040-18-5270 | 1.5d | 27 | 11.2 | 11.6 | 25 | 26 | ||||||
| B4040-18-5360 | 2d | 36 | 15.1 | 15.5 | 34 | 35 | ||||||
| B4040-18-5450 | 2.5d | 45 | 19.1 | 19.5 | 43 | 44 | ||||||
| B4040-18-4180 | M18×1.5 | 1d | 18 | 9.4 | 10.2 | 16.5 | 17.25 | 20.54 | 22 | 18.54 | 18.9 | 21.25 |
| B4040-18-4270 | 1.5d | 27 | 14.8 | 15.9 | 25.5 | 26.25 | ||||||
| B4040-18-4360 | 2d | 36 | 20.3 | 21.6 | 34.5 | 35.25 | ||||||
| B4040-18-4450 | 2.5d | 45 | 25.8 | 27.4 | 43.5 | 44.25 | ||||||
| B4040-18-4540 | 3d | 54 | 31.2 | 33.1 | 52.5 | 53.25 | ||||||
| Wire thread insert thread specifications | Clamping torque/ N·m |
Locking torque/N·m | |
| First screw-in Max. |
5th time to unscrew Minimum |
||
| M3 | 1.0 | 0.43 | 0.06 |
| M4 | 2.4 | 0.9 | 0.10 |
| M5 | 5.0 | 1.6 | 0.15 |
| M6 | 8.0 | 3.0 | 0.25 |
| M7 | 14 | 4.4 | 0.35 |
| M8 | 20 | 6.0 | 0.45 |
| M8X1 | 20 | 6.0 | 0.45 |
| M10 | 40 | 11 | 0.8 |
| M10X1.25 | 40 | 11 | 0.8 |
| M10×1 | 40 | 11 | 0.8 |
| M12 | 70 | 16 | 1.2 |
| M12×1.5 | 70 | 16 | 1.2 |
| M12X1.25 | 70 | 16 | 1.2 |
| M12×1 | 70 | 16 | 1.2 |
| M14 | 110 | 24 | 1.6 |
| M14×1.5 | 110 | 24 | 1.6 |
| M14X1.25 | 110 | 24 | 1.6 |
| M16 | 170 | 32 | 2.2 |
| M16X1.5 | 170 | 32 | 2.2 |
| M18 | 220 | 42 | 3 |
| M18×2 | 220 | 42 | 3 |
| M18×1.5 | 220 | 42 | 3 |
The test methods for clamping torque and locking torque shall comply with GB/T24425.6-2009.
The material grades and surface treatment methods of wire thread inserts are as follows:
| Product Name | Material | Material grade/standard | Surface treatment | Salt spray test |
| Ordinary wire thread insertB4040 | Stainless steel | 304
（JIS G4314） |
1）True Color | — |
| 2）Electrophoretic paint | 720H No substrate corrosion |
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