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NAS1581F3R2
Close Tolerance Screw
Description
Flush Reduced Head Bolt - NAS1581F3R12
Specifications
| Countersink Angle | Between 99.0 degrees and 101.0 degrees |
|---|---|
| Country of Origin | USA |
| Fastener Length | Between 0.472 inches and 0.502 inches |
| Finish | Cadmium Per Ams QQ-P-416 TYPE II |
| Grip | 0.125 |
| Grip Diameter | Between 0.2485 inches and 0.2495 inches |
| Grip Length | Between 0.115 inches and 0.135 inches |
| Head Diameter | Between 0.258 inches and 0.305 inches |
| Head Style | Flat countersunk |
| Heat Treat | 160,000 - 180,000 PSI |
| Internal Drive Style | Torque-set ribbed |
| Length | 0.487, 1/2 |
| Material | Steel |
| Material Specification | Mil-s-5626 military specification 1st material response or mil-s-5000 military specification 2nd material response or mil-s-6049 military specification 3rd material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Pre-Packaged Bag Quantity | 50 |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Class 2 federal specification all treatment responses type 2 qq-p-416 |
| Thread Class | 3a |
| Thread Diameter | 0.190 |
| Thread Direction | Right-hand |
| Thread Length | 0.363 |
| Thread Qty | 32 |
| Thread Qty Per Inch (tpi) | 32 |
| Thread Series | UNJF |
| Thread Series Designator | Unjf (fine thread with external controlled root radius) |
| Thread Size | 10 |
| Weight | .0015 lb |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1581F3R2. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error