BM55156-8-23A
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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.
3a thread class, 0.561 inches minimum thread length, 1.998 inches nominal fastener length, double hexagon head style, 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
- 0.561 inches minimum
- Fastener Length
- 1.998 inches nominal
- Head Style
- double hexagon
- Head Height
- 0.281 inches nominal
- Width Between Flats
- 0.741 inches minimum and 0.752 inches maximum
- Grip Diameter
- 0.4982 inches minimum and 0.4991 inches maximum
- Nominal Thread Diameter
- 0.500 inches
- Grip Length
- 1.438 inches nominal
- Thread Quantity Per Inch
- 20
- Minimum Tensile Strength
- 260000 pounds per square inch
- Hardness Rating
- 51.0 rockwell c minimum and 54.0 rockwell c maximum overall
- Material
- steel overall
- Material Document And Classification
- sps-m-107,fscm 03680 mfr ref single material response overall
- Surface Treatment
- cadmium head
- Surface Treatment
- cadmium threads
- Surface Treatment Document And Classification
- mil-c-8837 ty 1,cl 2 mil spec single treatment response head
- Surface Treatment Document And Classification
- mil-c-8837 ty 1,cl 2 mil spec single treatment response threads
- 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 |
|---|---|
| AIC260-8A23 | Shear Bolt |
| BM55156-8-23A | Shear Bolt |
| EWSB26-8A23 | Shear Bolt |
| GB511C8-23 | Shear Bolt |
| VS2106-8-23 | Shear Bolt |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5306-00-947-4314?
Does the NSN 5306-00-947-4314 have a Schedule B code assigned?
Does NSN 5306-00-947-4314 require demilitarization?
Does NSN 5306-00-947-4314 contain precious materials?
Does NSN 5306-00-947-4314 contain hazardous materials?
When the NSN 5306-00-947-4314 was assigned to the Federal Catalog?
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