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NAS1104-38
Machine Bolt
Description
Fastener Length: 2-11/16", Thread: 1/4-28, Thread Length: 5/16
Specifications
| Fastener Length | 2.691 |
|---|---|
| Grip Diameter | Between 0.2485 inches and 0.2495 inches |
| Grip Length | 2.375 |
| Hardness Rating | 36.0 rockwell c and 40.0 rockwell c |
| Head Height | 0.125 |
| Head Style | Dished hexagon |
| Material | Steel |
| Material Specification | Mil-s-5626 military specification 1st material response or mil-s-5000 military specification 2nd material response or mil-s-8503 military specification 3rd material response or mil-s-6098 military specification 4th material response or mil-s-6049 military specification 5th material response or mil-s-8695 military specification 6th material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Cl 3 federal specification single treatment response type 2 qq-p-416 |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.316 |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNF |
| Thread Series Designator | Unf (fine thread) |
| Thread Size | 1/4 |
| Width Between Flats | Between 0.430 inches and 0.439 inches |
Cross-reference
Interchangeable
Parts that share a National Stock Number or are listed as an alternate for NAS1104-38 — functionally equivalent.
- NAS6204-38 Listed alternate 28.00-28 · 0.086 in · Dished hexagon · Steel
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Catalog data updated 2026-07-05. Report a data error