MS21125B413
View detailed technical data, stock status, and sourcing information for: MS21125B413
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A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (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. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.
3a thread class, flat chamfer head style, 0.278 inches minimum and 0.329 inches maximum thread length, right-hand thread direction, 1.231 inches minimum and 1.251 inches maximum fastener length
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
- 0.278 inches minimum and 0.329 inches maximum
- Fastener Length
- 1.231 inches minimum and 1.251 inches maximum
- Head Style
- flat chamfer
- Head Diameter
- 0.477 inches minimum and 0.492 inches maximum
- Head Height
- 0.126 inches minimum and 0.141 inches maximum
- Locking Feature
- detent ball fastener
- Grip Diameter
- 0.2487 inches minimum and 0.2492 inches maximum
- Shank Unthreaded Hole Diameter
- 0.076 inches minimum and 0.086 inches maximum first hole
- Internal Drive Style
- slot
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 0.812 inches minimum and 0.828 inches maximum
- Thread Quantity Per Inch
- 28
- Distance From Head Largest Bearing Surface To Shank Hole Center
- 1.135 inches minimum and 1.155 inches maximum first hole
- Surface Finish
- 32.0 microinches bearing surface of head
- Surface Finish
- 32.0 microinches grip
- Part Name Assigned By Controlling Agency
- navy special project
- Material
- steel comp xm-13 overall
- Material Document And Classification
- ams 5629 assn std single material response overall
Replaces National Stock Numbers
Below is a list of NSNs that have been officially superseded by this NSN:
| NSN | Name | Date |
|---|---|---|
| 5305-00-093-6775 | No Name Available | 04/01/1986 |
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 |
|---|---|
| CA2651-4-13 | Close Tolerance Screw |
| MS21125B413 | Close Tolerance Screw |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5305-00-092-6682?
Does the NSN 5305-00-092-6682 have a Schedule B code assigned?
Does NSN 5305-00-092-6682 require demilitarization?
Does NSN 5305-00-092-6682 contain precious materials?
Does NSN 5305-00-092-6682 contain hazardous materials?
When the NSN 5305-00-092-6682 was assigned to the Federal Catalog?
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