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BACB30LR4-9
Bolt
Description
Fastener Length: 63/64", Thread: 1/4-28, Thread Length: 27/64"
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Distance From Head Largest Bearing Surface To Shank Hole Center | 2.6845 inches nominal first hole |
| Fastener Length | 0.9875 |
| Grip Diameter | 0.2481 inches minimum and 0.2485 inches maximum |
| Grip Length | 0.5625 |
| Head Diameter | 0.455 inches minimum and 0.510 inches maximum |
| Head Style | Flat countersunk |
| Length | 63/64 |
| Locking Feature | Pellet locking feature |
| Material | Steel |
| Material Specification | Ams5737 assn std single material response |
| Shank Unthreaded Hole Diameter | 0.076 |
| Surface Treatment | Cadmium |
| Surface Treatment Specification | Qq-p-416, type ii, class 2 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.425 |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNJF |
| Thread Size | 1/4 |
Cross-reference
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- NAS1790-4R9 NAS 1/4-28 · 31/32 in · Flat countersunk · Steel
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Catalog data updated 2026-07-05. Report a data error