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Dimensional Tolerances
| Rounds (Cold Finished) | |
|---|---|
| 1/16″ – Under 5/16″ | (+/- .001) |
| 5/16″ – Under 1/2″ | (+/- .0015) |
| 1/2″ – Under 1″ | (+/- .002) |
| 1″ – Under 1 1/2″ | (+/- .0025) |
| 1 1/2″ – Under 3 1/4″ | (+/- .003) |
| 3 1/4″ – Under 4″ | (+/- .005) |
| Rounds (Hot Finished) | |
|---|---|
| Over 3 1/2″ – 4 1/2″ | (+1/16″ / -0) |
| Over 4 1/2″ – 5 1/2″ | (+5/64″ / -0) |
| Over 5 1/2″ – 6 1/2″ | (+1/8″ / -0) |
| Over 6 1/2″ – 8″ | (+5/32″ / -0) |
| Over 8″ – 12″ | (+3/16″ / -0) |
| Over 12″ – 15″ | (+7/32″ / -0) |
| Over 15″ – 25″ | (+1/4″ / -0) |
| Hexes & Squares (Cold Finished) | |
|---|---|
| 1/8″ – Under 5/16″ | (+0/- .002) |
| 5/16″ – Under 1/2″ | (+0/- .003) |
| 1/2″ – Under 3 1/2″ | (+0/- .004) |
| 1″ – 2″ | (+0/- .006) |
| Over 2″ – 3″ | (+0/- .008) |
| Over 3″ | (+0/- .010) |
| Hot Finished Angles | ||
|---|---|---|
| Leg Length | Up to 6″ (+/- 1/8″) |
Over 6″ (+3/16″/-1/8″) |
| Weight | Up to 6 lb. /Ft. (+/- 7.1/2″%) |
Over 6 lb. / Ft (+/- 4.1/2″%) |
| Leg Squareness | Right Angle (+/- 2°) | |
Mill Flat Bars (Hot Finished)
| Width | Thickness 1/8″ – 1/2″ |
Thickness Over 1/2″ – 1″ |
Thickness Over 1″ – 4′ |
Thickness Over 4″ – 6″ |
Thickness 6″ – 8″ |
Permitted Variations in Width |
|---|---|---|---|---|---|---|
| To 1″ | (+/- .008) | (+/- .010) | – | – | – | (+/- .015) |
| Over 1″ – 2″ | (+/- .012) | (+/- .015) | – | – | – | (+/- .031) |
| Over 2″ – 4″ | (+/- .015) | (+/- .020) | (+.062/-0.31) | – | – | (+.062/-0.31) |
| Over 4″ – 6″ | (+/- .015) | (+/- .020) | (+.062/-0.31) | (+.093/-0.62) | – | (+.093/-0.62) |
| Over 6″ – 8″ | (+/- .016) | (+/- .025) | (+.062/-0.31) | (+.093/-0.62) | (+.125/-.156) | (+.125/-.156) |
| Over 8″ – 12″ | (+/- .020) | (+/- .031) | (+.062/-0.31) | (+.093/-0.62) | (+.125/-.156) | (+.156/-.187) |
Processed Flat Bar
| Thickness | Thickness Variation | Width Variation Widths to 4″ |
Width Variation Widths over 4″ |
|---|---|---|---|
| Over .114 – .130 | (+/-.010) | (+.094/-0.31) | (+/-.094) |
| Over .130 – .145 | (+/-.012) | (+.094/-0.31) | (+/-.094) |
| Over .145 – Under 3/16″ | (+/-.014) | (+.094/-0.31) | (+/-.094) |
| 3/16″ – Under 3/8″ | (+.050/-.010) | (+.094/-0.31) | (+/-.094) |
| 3/8″ – Under 3/4″ | (+.060/-.010) | (+.094/-0.31) | (+/-.094) |
