BSL® Tolerance Adjuster products can provide assembly clearance adjustment between threaded connections for automotive sheet metal to eliminate the cumulative tolerance between components.
Usage scenarios
BSL® tolerance adjusters produce different structural features according to different application parts of the car, such as snap-on structure for instrument panel assembly, rivet structure for connecting lamps to the body, snap-on structure for luggage rack and roof sheet metal installation, etc.
size
| Product Code | Thread D | Width Reference |
Height Reference |
Total height after unscrewing h Max |
Buckle space |
| B7031-160060-Z | M16×1.25LH | 28 | 16.8 | 22.8 | 12.8-13.2 |
| B7031-160060-S | M16×1.25LH | 28 | 16.8 | 22.8 | 12.8-13.2 |
Note 1: Code “-160060” indicates thread specification M16, adjustable clearance e=6mm.
Code “S” is manual type, “Z” is automatic type.
Performance Table
| Screw insertion force (N) max |
Holding load when rotating out to the maximum distance (N)min |
| 150 | 17500 |
Surface treatment
The surface protection of the tolerance adjuster depends on the installation environment requirements. The material grades and protection types are as follows:
| Product parts | Material | Material Standards | Surface treatment | Protection performance
(under neutral salt spray test conditions) |
Application Regulator Type |
| Nuts | SWCH6A/
SWCH15A |
JIS G3507-1 | Galvanized;
Zinc-nickel alloy |
Coating ≥5um
72H no white rust, 144H no red rust 120H no white rust, 480H no red rust |
Rivet type
Various snap-on types Tail wing |
| 20# | GB/T 699 | ||||
| 1215 | GB/T 8731 | ||||
| Screw | 20# | GB/T 699 | |||
| SWCH22A | JIS G3507-1 | ||||
| 1215 | GB/T 8731 | ||||
| Circlip | 65Mn | GB/T 1222 | Phosphating; zinc-nickel alloy | 2H no red rust;
120H no white rust, 480H no red rust |
Clip-on |
| 301 | ASTM A240 | True Color | — | ||
| Plastic parts | PA66 | VW 50127 | White/Black/Blue-Gray/Gray/Yellow | — | Clip-on |
| Foam | CS90 | — | — | — | Rear |
| Metal inserts | 20# | GB/T 699 | Zinc-nickel alloy, | Coating ≥5um, no white rust for 120H, no red rust for 480H | Rear |
Installation Method
1.1 Installation of snap-on tolerance adjuster
1) Manually press into the bottom sheet metal slot for positioning;
2) Align the holes of the upper sheet metal;
3) Insert the installation screw;
4) Use a fixed torque wrench to rotate the fastening bolt;
5) Screw in the fixing nut for tightening.
Due to the reverse rotation and lifting mechanism of the screw of the adjuster, it automatically fits the sheet metal surface during the tightening of the bolt, which plays a role in eliminating the gap between the sheet metal.
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