NCS-4S-2-20
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A headed fastener threaded externally on a portion or on the full length of the shank. The head has projections on the underside or periphery, or is otherwise designed to be mechanically pressed and embedded in a metallic panel, or the like. It is securely locked in position by the displaced metal. For items that require locking rings, see bolt, self-locking and stud, locked in. Excludes:insert, screw thread.
2b nut thread thread class, right-hand nut thread thread direction, 0.155 inches minimum and 0.159 inches maximum head diameter, 0.610 inches minimum and 0.640 inches maximum nut thread thread length, 0.053 inches minimum and 0.063 inches maximum head 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
- 2b nut thread
- Thread Direction
- right-hand nut thread
- Thread Length
- 0.610 inches minimum and 0.640 inches maximum nut thread
- Head Diameter
- 0.155 inches minimum and 0.159 inches maximum
- Head Length
- 0.053 inches minimum and 0.063 inches maximum
- Locking Feature
- self-clinching head
- Overall Length
- 0.649 inches minimum and 0.679 inches maximum
- Distance Across Flats
- 0.188 inches nominal
- Thread Quantity Per Inch
- 40 nut thread
- Nominal Thread Size
- 0.112 inches nut thread
- Material
- steel comp 303
- Material Document And Classification
- astma582 assn std single material response
- Surface Treatment
- passivate overall
- Surface Treatment Document And Classification
- mil-f-14072 e300 mil spec single treatment response overall
- Style Designator
- self-locking
- Thread Series Designator
- unc nut thread
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 |
|---|---|
| 153061-70 | Self-Locking Stud |
| 34S(.062)-ST-20 | Self-Locking Stud |
| 610073P7 | Self-Locking Stud |
| M63540/3-6-10 | Self-Locking Stud |
| NCS-4S-2-20 | Self-Locking Stud |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5307-01-185-7321?
Does NSN 5307-01-185-7321 require demilitarization?
Does NSN 5307-01-185-7321 contain precious materials?
Does NSN 5307-01-185-7321 contain hazardous materials?
When the NSN 5307-01-185-7321 was assigned to the Federal Catalog?
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