NASM 3 THRU NASM 20
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An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. The threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. For items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, bolt, shear. See also screw, cap, hexagon head and screw, machine.
hexagon head style, 3a thread class, right-hand thread direction, 0.640 inches minimum thread length, 4.078 inches nominal fastener 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
- 0.640 inches minimum
- Fastener Length
- 4.078 inches nominal
- Head Style
- hexagon
- Head Height
- 0.203 inches minimum and 0.235 inches maximum
- Width Between Flats
- 0.553 inches minimum and 0.565 inches maximum
- Hole Diameter
- 0.070 inches nominal
- Shank Unthreaded Hole Diameter
- 0.106 inches nominal first hole
- Nominal Thread Diameter
- 0.375 inches
- Grip Length
- 3.438 inches nominal
- Hole Quantity
- 1
- Hole Type
- drilled
- Features Provided
- finished head
- Thread Quantity Per Inch
- 24
- 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
- Distance From Head Largest Bearing Surface To Shank Hole Center
- 3.876 inches nominal first hole
- 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 single treatment response overall
- Thread Series Designator
- unf
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 |
|---|---|
| AN6H40 | Machine Bolt |
| NASM 3 THRU NASM 20 | Machine Bolt |
FAQs
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What is the FSCG of the NSN 5306-00-638-5759?
Does the NSN 5306-00-638-5759 have a Schedule B code assigned?
Does NSN 5306-00-638-5759 require demilitarization?
Does NSN 5306-00-638-5759 contain precious materials?
Does NSN 5306-00-638-5759 contain hazardous materials?
When the NSN 5306-00-638-5759 was assigned to the Federal Catalog?
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