9M188-250
View detailed technical data, stock status, and sourcing information for: 9M188-250
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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.
2.272 inches minimum and 2.307 inches maximum inside diameter, not casehardened casehardening indicator, double oval cross-sectional shape style, 2.653 inches minimum and 2.678 inches maximum outside diameter, 0.077 inches minimum and 0.083 inches maximum major thickness
Product Characteristics
Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.
- Cross-Sectional Shape Style
- double oval
- Inside Diameter
- 2.272 inches minimum and 2.307 inches maximum
- Casehardening Indicator
- not casehardened
- Outside Diameter
- 2.653 inches minimum and 2.678 inches maximum
- Major Thickness
- 0.077 inches minimum and 0.083 inches maximum
- Ring Style
- special flat
- Usage Design
- internal
- Material Hardness Rating
- 40.0 rockwell c minimum and 51.5 rockwell c maximum
- Strength Rating
- 221000.0 pounds per square inch minimum tensile
- Material
- steel
- Material Document And Classification
- sae 1070 thru 1090 assn std single material response
- Surface Treatment
- cadmium and chromate
Replaces National Stock Numbers
Below is a list of NSNs that have been officially superseded by this NSN:
| NSN | Name | Date |
|---|---|---|
| 5365-00-527-2088 | No Name Available | 08/09/1991 |
| 5365-00-576-8456 | No Name Available | 12/01/1991 |
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 |
|---|---|
| 9M188-250 | Retaining Ring |
| RRT250 | Retaining Ring |
| RRT250C | Retaining Ring |
| RRT250CDM9 | Retaining Ring |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5325-00-531-3973?
Does the NSN 5325-00-531-3973 have a Schedule B code assigned?
Does NSN 5325-00-531-3973 require demilitarization?
Does NSN 5325-00-531-3973 contain precious materials?
Does NSN 5325-00-531-3973 contain hazardous materials?
When the NSN 5325-00-531-3973 was assigned to the Federal Catalog?
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