MS21250-04007
View detailed technical data, stock status, and sourcing information for: MS21250-04007
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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.
0.9295 inches nominal fastener length, right-hand thread direction, 0.492 inches minimum thread length, 3a thread class, double hexagon extended washer head style
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
- 0.492 inches minimum
- Fastener Length
- 0.9295 inches nominal
- Head Style
- double hexagon extended washer
- Head Height
- 0.300 inches nominal
- Width Between Flats
- 0.3125 inches nominal
- Extended Washer Diameter
- 0.428 inches minimum and 0.438 inches maximum
- Extended Washer Thickness
- 0.069 inches nominal
- Grip Diameter
- 0.2485 inches minimum and 0.2495 inches maximum
- Nominal Thread Diameter
- 0.2500 inches
- Grip Length
- 0.4275 inches minimum and 0.4475 inches maximum
- Thread Quantity Per Inch
- 28
- Minimum Tensile Strength
- 180000 pounds per square inch
- Hardness Rating
- 39.0 rockwell c minimum and 43.0 rockwell c maximum overall
- Surface Finish
- 125.0 microinches grip
- Surface Finish
- 125.0 microinches threads
- Surface Finish
- 32.0 microinches bearing surface of head
- Part Name Assigned By Controlling Agency
- bolt,tension,steel,external wrenching,flanged,12-point,180 ksi ftu,450 degree
- Special Features
- maximum tensile strength is 200,000 psi
- Material
- steel comp 4140 or steel comp 4340 or steel comp 8740 or steel comp 6150 overall
- Material Document And Classification
- mil-s-5826(aisi 4140) government std/spec 1st material response or mil-s-5000(aisi 4340) government std/spec 2nd material response or mil-s-6049(aisi 8740) government std/spec 3rd material response or mil-s-8503(aisi 6150) government std/spec 4th material response overall
- Surface Treatment
- cadmium overall
- Surface Treatment Document And Classification
- qq-p-416,type ii,class 2 national std single treatment response overall
- Thread Series Designator
- unjf
- Specification/Standard Data
- 80205-nas-21250 professional/industrial association standard
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 |
|---|---|
| MS21250-04007 | Shear Bolt |
FAQs
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What is the FSCG of the NSN 5306-01-643-2337?
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When the NSN 5306-01-643-2337 was assigned to the Federal Catalog?
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