1291-163-1
View detailed technical data, stock status, and sourcing information for: 1291-163-1
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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, flat chamfer head style, 0.160 inches nominal thread length, 0.440 inches nominal fastener length, 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
- 0.160 inches nominal
- Fastener Length
- 0.440 inches nominal
- Head Style
- flat chamfer
- Head Diameter
- 0.218 inches minimum and 0.226 inches maximum
- Head Height
- 0.134 inches minimum and 0.138 inches maximum
- Hole Diameter
- 0.033 inches minimum and 0.039 inches maximum
- Internal Drive Style
- hexagon
- Nominal Thread Diameter
- 0.138 inches
- Width Across Flats
- 0.110 inches nominal
- Hole Quantity
- 2
- Hole Type
- drilled
- Thread Quantity Per Inch
- 32
- Minimum Tensile Strength
- 170000 pounds per square inch
- Hole Configuration Style
- round internal hexagon
- Externally Relieved Body Diameter Quantity
- 1
- Material
- steel comp 410 overall
- Surface Treatment
- oxide overall
- Surface Treatment Document And Classification
- mil-c-13924 mil spec 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 |
|---|---|---|
| 5306-01-053-1882 | 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 |
|---|---|
| 1291-163-1 | Internal Wrenching Bolt |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5306-01-096-7343?
Does the NSN 5306-01-096-7343 have a Schedule B code assigned?
Does NSN 5306-01-096-7343 require demilitarization?
Does NSN 5306-01-096-7343 contain precious materials?
Does NSN 5306-01-096-7343 contain hazardous materials?
When the NSN 5306-01-096-7343 was assigned to the Federal Catalog?
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