AN509-8R20
View detailed technical data, stock status, and sourcing information for: AN509-8R20
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An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes:bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. See also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.
1.265 inches minimum and 1.312 inches maximum fastener length, right-hand thread direction, 3a thread class, flat countersunk head style, 0.406 inches minimum and 0.484 inches maximum thread 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
- 0.406 inches minimum and 0.484 inches maximum
- Fastener Length
- 1.265 inches minimum and 1.312 inches maximum
- Head Style
- flat countersunk
- Head Diameter
- 0.283 inches minimum and 0.332 inches maximum
- Nominal Thread Diameter
- 0.164 inches
- Thread Quantity Per Inch
- 32
- Minimum Tensile Strength
- 125000 pounds per square inch
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Screw Material
- steel comp 8630
- Screw Material Document And Classification
- an-s-9,cond c4 or mil-s-605 cond c4 mil spec all material responses
- Screw Surface Treatment
- cadmium
- 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Below is a list of NSNs that have been officially superseded by this NSN: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 |
|---|---|---|
| 5305-00-811-2913 | No Name Available | 01/01/1960 |
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 |
|---|---|
| AN509-8R20 | Machine Screw |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5305-00-151-1311?
Does the NSN 5305-00-151-1311 have a Schedule B code assigned?
Does NSN 5305-00-151-1311 require demilitarization?
Does NSN 5305-00-151-1311 contain precious materials?
Does NSN 5305-00-151-1311 contain hazardous materials?
When the NSN 5305-00-151-1311 was assigned to the Federal Catalog?
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