MS51977-84
View detailed technical data, stock status, and sourcing information for: MS51977-84
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An externally threaded fastener designed for insertion into holes in assembled parts, for mating with a preformed internal thread and for tightening or releasing by torquing the head. The threaded and unthreaded portions are both of the same nominal diameter of 0.190 inch (5 mm) or larger. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. The thread length being the controlled dimension, the grip length is not specified. A locking feature may be incorporated in the design of the head or threads. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. Excludes:bolt,machine; bolt,externally relieved body; bolt,internal wrenching; and screw,cap,socket head.
0.500 inches maximum thread length, 0.500 inches nominal fastener length, headless (setscrew) head style, right-hand thread direction, 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
- 0.500 inches maximum
- Fastener Length
- 0.500 inches nominal
- Head Style
- headless (setscrew)
- Point Style
- half dog
- Internal Drive Style
- hexagon
- Nominal Thread Diameter
- 0.500 inches
- Width Across Flats
- 0.250 inches nominal
- Thread Quantity Per Inch
- 13
- Hardness Rating
- 45.0 rockwell c minimum and 53.0 rockwell c maximum overall
- Material
- steel comp 4037 or steel comp 4137 or steel comp 4140 or steel comp 8630 or steel comp 8740 overall
- Material Document And Classification
- 66 fed std all material responses overall
- Surface Treatment
- cadmium and chromate overall
- Surface Treatment Document And Classification
- qq-p-416 type 2 class 3 fed spec all treatment responses 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Below is a list of NSNs that have been officially superseded by this NSN: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 |
|---|---|---|
| 5305-00-013-9873 | No Name Available | 08/01/1976 |
| 5305-00-285-4696 | No Name Available | 12/01/1980 |
| 5305-00-292-1010 | No Name Available | 05/01/1976 |
| 5305-00-616-6275 | No Name Available | 09/01/2023 |
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 |
|---|---|
| 139873 | Setscrew |
| 15A00229-0000 ITEM 44 | Setscrew |
| 413B1 | Setscrew |
| 5305009390576 | Setscrew |
| 881D | Setscrew |
| MS51041-84 | Setscrew |
| MS51045-85 | Setscrew |
| MS51977-84 | Setscrew |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5305-00-939-0576?
Does the NSN 5305-00-939-0576 have a Schedule B code assigned?
Does NSN 5305-00-939-0576 require demilitarization?
Does NSN 5305-00-939-0576 contain precious materials?
Does NSN 5305-00-939-0576 contain hazardous materials?
When the NSN 5305-00-939-0576 was assigned to the Federal Catalog?
Professional Distribution
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