818-SS-20
View detailed technical data, stock status, and sourcing information for: 818-SS-20
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An externally threaded fastener whose threaded portion is of one nominal diameter, no. 10 (0.190 in.) (5 mm) or larger. It is designed with an internal socket or internal multiple spline for use with an internal driver. The head is beveled (conical) or cylindrical in shape. Items with cylindrical shaped heads must have an externally relieved body. A locking feature may be incorporated in the design of the head or threads. See also screw, cap, socket head. Excludes:setscrew; screw, shoulder; bolt, shoulder; screw, externally relieved body; bolt, externally relieved body; and screw, machine.
0.312 inches maximum fastener length, 2a thread class, right-hand thread direction, 0.100 inches maximum thread length, fillister 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
- 2a
- Thread Direction
- right-hand
- Thread Length
- 0.100 inches maximum
- Fastener Length
- 0.312 inches maximum
- Head Style
- fillister
- Head Diameter
- 0.183 inches maximum
- Head Height
- 0.079 inches maximum
- First Diameter From Head
- 0.080 inches maximum
- Distance From Largest Bearing Surface Of Head To End Of First Diameter
- 0.212 inches maximum
- Internal Drive Style
- slot
- Nominal Thread Diameter
- 0.112 inches
- Thread Quantity Per Inch
- 40
- Externally Relieved Body Diameter Quantity
- 1
- Material
- steel comp 303 overall
- Material Document And Classification
- mil-s-7720 mil spec single material response overall
- Surface Treatment
- passivate 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Below is a list of NSNs that have been officially superseded by this NSN: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 |
|---|---|---|
| 5305-01-105-8057 | No Name Available | 10/01/1989 |
| 5305-01-335-7055 | No Name Available | 10/01/1992 |
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 |
|---|---|
| 6231-SS-0440 | Externally Relieved Body Screw |
| 6231SS0440-7 | Externally Relieved Body Screw |
| 818-SS-20 | Externally Relieved Body Screw |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5305-00-723-7191?
Does the NSN 5305-00-723-7191 have a Schedule B code assigned?
Does NSN 5305-00-723-7191 require demilitarization?
Does NSN 5305-00-723-7191 contain precious materials?
Does NSN 5305-00-723-7191 contain hazardous materials?
When the NSN 5305-00-723-7191 was assigned to the Federal Catalog?
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