20249 BLK.OXIDE
View detailed technical data, stock status, and sourcing information for: 20249 BLK.OXIDE
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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.
2a thread class, right-hand thread direction, 0.699 inches minimum and 0.792 inches maximum thread length, flat countersunk head style, 0.844 inches minimum and 0.875 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
- 2a
- Thread Direction
- right-hand
- Thread Length
- 0.699 inches minimum and 0.792 inches maximum
- Fastener Length
- 0.844 inches minimum and 0.875 inches maximum
- Head Style
- flat countersunk
- Head Diameter
- 0.244 inches minimum and 0.279 inches maximum
- Internal Drive Style
- cross recess type 1
- Nominal Thread Diameter
- 0.138 inches
- Thread Quantity Per Inch
- 32
- Minimum Tensile Strength
- 55000 pounds per square inch
- Countersink Angle
- 80.0 degrees minimum and 82.0 degrees maximum
- Screw Material
- copper alloy
- Screw Material Document And Classification
- qq-b-626 fed spec single material response or qq-w-321 fed spec single material response
- Thread Series Designator
- unc
- Nondefinitive Spec/Std Data
- 3 type and 2c style
Replaces National Stock Numbers
Below is a list of NSNs that have been officially superseded by this NSN:
| NSN | Name | Date |
|---|---|---|
| 5305-00-063-8098 | No Name Available | 03/18/1966 |
| 5305-00-616-8089 | No Name Available | 03/23/1966 |
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 |
|---|---|
| 1175B6-14 | Machine Screw |
| 20249 BLK.OXIDE | Machine Screw |
| 20249 BLK.OXIDEADX | Machine Screw |
| 40B5702B632-14 | Machine Screw |
| AN505B6R14 | Machine Screw |
| MS35198-30 | Machine Screw |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5305-00-151-2362?
Does the NSN 5305-00-151-2362 have a Schedule B code assigned?
Does NSN 5305-00-151-2362 require demilitarization?
Does NSN 5305-00-151-2362 contain precious materials?
Does NSN 5305-00-151-2362 contain hazardous materials?
When the NSN 5305-00-151-2362 was assigned to the Federal Catalog?
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