1-4 20X7-8IN
View detailed technical data, stock status, and sourcing information for: 1-4 20X7-8IN
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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.
0.875 inches nominal fastener length, right-hand thread direction, square head style, 0.750 inches minimum thread length, 2a thread class
Product Characteristics
Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.
- Thread Class
- 2a
- Thread Direction
- right-hand
- Thread Length
- 0.750 inches minimum
- Fastener Length
- 0.875 inches nominal
- Head Style
- square
- Head Height
- 0.156 inches minimum and 0.188 inches maximum
- Width Between Flats
- 0.362 inches minimum and 0.375 inches maximum
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 0.125 inches nominal
- Features Provided
- unfinished head
- Thread Quantity Per Inch
- 20
- Minimum Tensile Strength
- 55000 pounds per square inch
- Hardness Rating
- 95.0 rockwell b maximum overall
- Material
- steel overall
- Material Document And Classification
- ff-b-575 fed spec single material response overall
- Thread Series Designator
- unc
- Nondefinitive Spec/Std Data
- 1 type and 1 grade
Replaces National Stock Numbers
Below is a list of NSNs that have been officially superseded by this NSN:
| NSN | Name | Date |
|---|---|---|
| 5306-00-973-5258 | No Name Available | 06/14/2023 |
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 |
|---|---|
| 1-4 20X7-8IN | Machine Bolt |
| 109146 | Machine Bolt |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5306-00-010-9146?
Does the NSN 5306-00-010-9146 have a Schedule B code assigned?
Does NSN 5306-00-010-9146 require demilitarization?
Does NSN 5306-00-010-9146 contain precious materials?
Does NSN 5306-00-010-9146 contain hazardous materials?
When the NSN 5306-00-010-9146 was assigned to the Federal Catalog?
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Pricing
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