B1821BH031C375N
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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 minimum and 1.062 inches maximum thread length, right-hand thread direction, hexagon head style, 2a thread class, 3.656 inches minimum and 3.750 inches maximum 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
- 2a
- Thread Direction
- right-hand
- Thread Length
- 0.875 inches minimum and 1.062 inches maximum
- Fastener Length
- 3.656 inches minimum and 3.750 inches maximum
- Head Style
- hexagon
- Head Height
- 0.195 inches minimum and 0.211 inches maximum
- Width Between Flats
- 0.489 inches minimum and 0.500 inches maximum
- Nominal Thread Diameter
- 0.312 inches
- Features Provided
- finished head
- Thread Quantity Per Inch
- 18
- Minimum Tensile Strength
- 150000 pounds per square inch
- Hardness Rating
- 33.0 rockwell c minimum and 39.0 rockwell c maximum overall
- Surface Finish
- 63.0 microinches threads
- Material
- steel overall
- Material Document And Classification
- saej429 grade 8 assn std single material response or astm a354 grade bd assn std single material response overall
- Surface Treatment
- zinc and chromate overall
- Surface Treatment Document And Classification
- astm b633 ty 2 sc 3 assn std single treatment response overall
- Thread Series Designator
- unc
Replaces National Stock Numbers
Below is a list of NSNs that have been officially superseded by this NSN:
| NSN | Name | Date |
|---|---|---|
| 5306-00-018-8154 | No Name Available | 01/17/2017 |
| 5306-00-878-9216 | No Name Available | 06/04/2008 |
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 |
|---|---|
| 413-560 | Machine Bolt |
| 79H3300 | Machine Bolt |
| B1821BH031C375N | Machine Bolt |
| MS90728-47 | Machine Bolt |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5306-00-226-4840?
Does the NSN 5306-00-226-4840 have a Schedule B code assigned?
Does NSN 5306-00-226-4840 require demilitarization?
Does NSN 5306-00-226-4840 contain precious materials?
Does NSN 5306-00-226-4840 contain hazardous materials?
When the NSN 5306-00-226-4840 was assigned to the Federal Catalog?
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