MS21297-07020
View detailed technical data, stock status, and sourcing information for: MS21297-07020
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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.
right-hand thread direction, spline extended washer head style, 0.753 inches minimum and 0.803 inches maximum thread length, 2.013 inches minimum and 2.043 inches maximum fastener length, 3a 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
- 3a
- Thread Direction
- right-hand
- Thread Length
- 0.753 inches minimum and 0.803 inches maximum
- Fastener Length
- 2.013 inches minimum and 2.043 inches maximum
- Head Style
- spline extended washer
- Head Height
- 0.310 inches minimum and 0.350 inches maximum
- Width Between Flats
- 0.514 inches minimum and 0.521 inches maximum
- Extended Washer Diameter
- 0.807 inches minimum and 0.817 inches maximum
- Extended Washer Thickness
- 0.053 inches minimum and 0.073 inches maximum
- Grip Diameter
- 0.4360 inches minimum and 0.4370 inches maximum
- Nominal Thread Diameter
- 0.438 inches
- Grip Length
- 1.240 inches minimum and 1.260 inches maximum
- Thread Quantity Per Inch
- 20
- Minimum Tensile Strength
- 220000 pounds per square inch
- Hardness Rating
- 46.0 rockwell c minimum and 50.0 rockwell c maximum overall
- Surface Finish
- 32.0 microinches bearing surface of head
- Surface Finish
- 32.0 microinches grip
- Material
- steel comp h11 overall
- Material Document And Classification
- ams 6487 assn std single material response overall
- Surface Treatment
- cadmium and chromate overall
- Surface Treatment Document And Classification
- mil-c-8837 ty 2 cl 2 mil spec single treatment response overall
- 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 |
|---|---|
| MS21297-07020 | Shear Bolt |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5306-01-058-0736?
Does the NSN 5306-01-058-0736 have a Schedule B code assigned?
Does NSN 5306-01-058-0736 require demilitarization?
Does NSN 5306-01-058-0736 contain precious materials?
Does NSN 5306-01-058-0736 contain hazardous materials?
When the NSN 5306-01-058-0736 was assigned to the Federal Catalog?
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