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NAS1104-43D
Machine Bolt
Description
Length: 2-63/64", Thread: 1/4-28, Thread Length: 21/64", drilled shank, NAS1104 series bolt
Specifications
| Distance From Head Largest Bearing Surface To Shank Hole Center | 2.863 inches minimum first hole and 2.913 inches maximum first hole |
|---|---|
| Fastener Length | 2.989 inches minimum and 3.019 inches maximum |
| Grip Diameter | 0.2485 inches minimum and 0.2495 inches maximum |
| Grip Length | 2.678 inches minimum and 2.698 inches maximum |
| Hardness Rating | 36.0 rockwell c minimum and 40.0 rockwell c maximum |
| Head Height | 0.125 inches minimum and 0.140 inches maximum |
| Head Style | Dished hexagon |
| Length | 2 63/64 |
| Material | Steel |
| Material Specification | Mil-s-5626 mil spec 1st material response or mil-s-5000 mil spec 2nd material response or mil-s-8503 mil spec 3rd material response or mil-s-6098 mil spec 4th material response or mil-s-6049 mil spec 5th material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Shank Unthreaded Hole Diameter | 0.076 inches minimum first hole and 0.086 inches maximum first hole |
| Specification Data | 80205-nas1104 professional/industrial association standard |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416,ty 2 cl 3 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.291 inches minimum and 0.341 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNJF |
| Thread Size | 1/4 |
| Width Between Flats | 0.430 inches minimum and 0.439 inches maximum |
Cross-reference
Interchangeable
Parts that share a National Stock Number or are listed as an alternate for NAS1104-43D — functionally equivalent.
- NAS6204-43D Listed alternate 1/4-28 · 0.099 in · Dished hexagon · Steel
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Catalog data updated 2026-07-05. Report a data error