BS 7842:1996
$86.31
Bolts, screws and studs with pre-applied thread sealing feature incorporated into the thread
| Published By | Publication Date | Number of Pages |
| BSI | 1996 | 10 |
This British Standard specifies the coatings, dimensions, materials, lubrication and performance requirements for bolts, screws and studs with a pre-applied sealing feature incorporated into the thread, when tested at a temperature between 15 °C and 30 °C.
It applies to bolts, screws and studs:
- with ISO metric coarse pitch M4 to M24 threads conforming to BS 3643 : Part 2 : 1981;
- with specific strength requirements conforming to either BS 6104 : Part 3 : 1981, BS 6105 : 1981 or BS EN 20898-1 : 1992, as appropriate;
- with threads of tolerance class 6g or 4h conforming to BS 3643 : Part 2 : 1981;
- for application into a mating component with a thread of tolerance class 6H conforming to BS 3643 : Part 2 : 1981;
- for use within the temperature range – 50 °C to + 150 °C.
The following are not covered in the scope of this standard:
- performance at temperatures outside the operating range;
- performance of bolts, screws and studs for which a lubricated or protective coating is not permissible;
- performance of taper threaded components.
