NAS428KH4-5
View detailed technical data, stock status, and sourcing information for: NAS428KH4-5
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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.
crowned hexagon head style, right-hand thread direction, 0.625 inches nominal fastener length, 3a thread class, 0.563 inches minimum and 0.594 inches maximum thread length
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
- 0.563 inches minimum and 0.594 inches maximum
- Fastener Length
- 0.625 inches nominal
- Head Style
- crowned hexagon
- Head Height
- 0.141 inches nominal
- Width Between Flats
- 0.438 inches nominal
- Hole Diameter
- 0.046 inches nominal
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 0.031 inches minimum and 0.062 inches maximum
- Hole Quantity
- 1
- Hole Type
- drilled
- Features Provided
- finished head
- Thread Quantity Per Inch
- 28
- Minimum Tensile Strength
- 125000 pounds per square inch
- Hardness Rating
- 26.0 rockwell c minimum and 32.0 rockwell c maximum overall
- Hole Configuration Style
- hexagon flats
- Special Features
- supplied w/slot in end of shank
- Material
- steel comp 4037 or steel comp 4130 or steel comp 8630 or steel comp 8735 or steel comp 8740 or steel comp 4140 overall
- Material Document And Classification
- mil-b-6812 mil spec all material responses overall
- Surface Treatment
- cadmium and chromate overall
- Surface Treatment Document And Classification
- qq-p-416 ty 2 cl 3 fed spec all treatment responses overall
- Thread Series Designator
- unjf
Replaces National Stock Numbers
Below is a list of NSNs that have been officially superseded by this NSN:
| NSN | Name | Date |
|---|---|---|
| 5306-00-208-0202 | No Name Available | 03/01/1990 |
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 |
|---|---|
| NAS428HK4A5 | Machine Bolt |
| NAS428KH4-5 | Machine Bolt |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5306-00-720-8047?
Does the NSN 5306-00-720-8047 have a Schedule B code assigned?
Does NSN 5306-00-720-8047 require demilitarization?
Does NSN 5306-00-720-8047 contain precious materials?
Does NSN 5306-00-720-8047 contain hazardous materials?
When the NSN 5306-00-720-8047 was assigned to the Federal Catalog?
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