bolts › close tolerance bolts
BACB30LU4-9
Close Tolerance Bolt
Description
Fastener Length: 63/64", Thread: 1/4-28, Thread Length: 7/16", BACB30 series bolt
Specifications
| Countersink Angle | 100.0 degrees |
|---|---|
| Fastener Length | Between 0.972 inches and 1.002 inches |
| Grip Diameter | Between 0.2485 inches and 0.2495 inches |
| Grip Length | Between 0.552 inches and 0.572 inches |
| Head Diameter | Between 0.455 inches and 0.510 inches |
| Head Style | Flat countersunk |
| Internal Drive Style | Cross recess type 1 |
| Material | Steel |
| Surface Finish | 32.0 microinches grip, 32.0 microinches threads |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Type 2 class 2 federal specification single treatment response qq-p-416 |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.400 inches and 0.450 inches |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNJF |
| Thread Series Designator | Unjf (fine thread with external controlled root radius) |
| Thread Size | 1/4 |
Cross-reference
No interchangeable or dimensionally similar parts are on record for BACB30LU4-9. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error