NAS1790-4R6
View detailed technical data, stock status, and sourcing information for: NAS1790-4R6
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A high strength, 160,000 pounds per square inch (1100 megapascals) minimum tensile strength externally threaded fastener designed for use in applications involving great shear stress. The head is designed to accommodate an external wrench or driver. The head is not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. The unthreaded portion is of specific grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. A locking feature may be incorporated in the design of the head or threads. See bolt, machine and bolt, clevis.
0.425 inches nominal thread length, flat countersunk head style, 0.679 inches minimum and 0.699 inches maximum fastener length, 3a thread class, right-hand thread direction
Product Characteristics
Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.
- Thread Class
- 3a
- Thread Direction
- right-hand
- Thread Length
- 0.425 inches nominal
- Fastener Length
- 0.679 inches minimum and 0.699 inches maximum
- Head Style
- flat countersunk
- Head Diameter
- 0.464 inches minimum and 0.506 inches maximum
- Hole Diameter
- 0.076 inches minimum and 0.086 inches maximum
- Grip Diameter
- 0.2485 inches minimum and 0.2495 inches maximum
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 0.365 inches minimum and 0.385 inches maximum
- Hole Quantity
- 1
- Hole Type
- drilled
- Thread Quantity Per Inch
- 28
- Minimum Tensile Strength
- 160000 pounds per square inch
- Hole Configuration Style
- round
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Part Name Assigned By Controlling Agency
- bolt, 100 deg flush head 160,000 psi uts
- Material
- steel comp 4140 or steel comp 4340 or steel comp e4340 or steel comp 8740 overall
- Material Document And Classification
- mil-s-5626 mil spec single material response or ams6415 assn std 2nd material response or mil-s-5000 mil spec 3rd material response or mil-s-60494 mil spec 4th material response overall
- Surface Treatment
- cadmium overall
- Surface Treatment Document And Classification
- qq-p-416, ty ii, cl 2 fed spec single treatment response overall
- Thread Series Designator
- unjf
Related Parts
This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:
| Part Number | Name |
|---|---|
| NAS1790-4R6 | Shear Bolt |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5306-01-495-1099?
Does the NSN 5306-01-495-1099 have a Schedule B code assigned?
Does NSN 5306-01-495-1099 require demilitarization?
Does NSN 5306-01-495-1099 contain precious materials?
Does NSN 5306-01-495-1099 contain hazardous materials?
When the NSN 5306-01-495-1099 was assigned to the Federal Catalog?
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In Stock
This item is currently available and ready for prompt shipment. Units may be offered in various conditions — new, surplus, or refurbished — and stored at verified global facilities. Request a quote to confirm current stock and delivery time.
| New Material | 40,625 |
| New Surplus | 707 |
| Serviceable | 1 |
| Overhauled | 3 |
| Total | 41,336 |