bolts › close tolerance bolts
BACB30LU4-2
Close Tolerance Bolt
Description
Fastener Length: 9/16", Thread: 1/4-28, Thread Length: 7/16
Specifications
| Countersink Angle | Between 99.0 degrees and 100.0 degrees |
|---|---|
| End Application | Ec18b;e-3a awacs c-18a stratolifter c-135;aircraft joint stars target radar sys;aircraft |
| Fastener Length | Between 0.535 inches and 0.565 inches |
| Grip Diameter | Between 0.2485 inches and 0.2495 inches |
| Grip Length | Between 0.115 inches and 0.135 inches |
| Head Diameter | Between 0.455 inches and 0.510 inches |
| Head Style | Flat countersunk |
| Internal Drive Style | Cross recess type 1 |
| Material | Steel |
| Material Specification | Mil-s-5000 military specification 1st material response or mil-s-6049 military specification 2nd material response or ams 6322 assn standard 2nd material response |
| Surface Finish | 32.0 microinches grip, 32.0 microinches threads |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416 type 2 cl 2 federal specification single treatment response |
| 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 BACB30LU4-2. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error