Bibliographic record
Abstract
In current RCSC Specification, ASTM F1852 twist-off tension-control bolt assemblies are directly recognized and twist-off-type tension-control bolt pretensioning is considered as one of the four bolt pretensioning methods. Twist-off tension-control bolt is characterized by the splined end which will be sheared off at a circular notch (torque control groove) when the required pretension is reached. Twist-off tension-control pretensioning is in fact based on torque control. Factors that affect the pretension of twist-of bolts are the bolt material strength, geometric properties of the bolts, thread conditions, lubrication conditions at the bolt and nut threads as well as the washer. A series of test programmes were performed to examine the influence of lubricants on installation, including time delays, weather conditions at time of installation, as well as the effects of other parameters on the bolt pretension. In addition, reinstallations of removed twist-off tension-control bolts with turn-of-nut pretensioning method were also investigated.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.005 | 0.002 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".