FS144-20
View detailed technical data, stock status, and sourcing information for: FS144-20
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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.
3a thread class, 1.235 inches minimum and 1.265 inches maximum fastener length, bevel-conical head style, 0.475 inches minimum and 0.525 inches maximum thread length, right-hand thread direction
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
- 0.475 inches minimum and 0.525 inches maximum
- Fastener Length
- 1.235 inches minimum and 1.265 inches maximum
- Head Style
- bevel-conical
- Head Diameter
- 0.430 inches minimum and 0.438 inches maximum
- Head Height
- 0.226 inches nominal
- Hole Diameter
- 0.046 inches nominal
- Internal Drive Style
- hexagon
- Nominal Thread Diameter
- 0.250 inches
- Width Across Flats
- 0.219 inches minimum and 0.221 inches maximum
- Hole Quantity
- 1
- Hole Type
- drilled
- Thread Quantity Per Inch
- 28
- Minimum Tensile Strength
- 160000 pounds per square inch
- Hole Configuration Style
- hexagon flats
- Material
- steel comp e4340 or steel comp 8740 or steel comp 6150 or steel comp 3140 or steel comp 3135 overall
- Surface Treatment
- cadmium and chromate overall
- Surface Treatment Document And Classification
- qq-s-416,ty 2,cl 3 fed spec all treatment responses overall
- Thread Series Designator
- unjf
- Specification/Standard Data
- 80205-nas144 professional/industrial association standard
Replaces National Stock Numbers
Below is a list of NSNs that have been officially superseded by this NSN:
| NSN | Name | Date |
|---|---|---|
| 1560-00-614-2953 | No Name Available | 04/01/1968 |
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 |
|---|---|
| FS144-20 | Internal Wrenching Bolt |
| NAS144DH20 | Internal Wrenching Bolt |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5306-00-149-9994?
Does the NSN 5306-00-149-9994 have a Schedule B code assigned?
Does NSN 5306-00-149-9994 require demilitarization?
Does NSN 5306-00-149-9994 contain precious materials?
Does NSN 5306-00-149-9994 contain hazardous materials?
When the NSN 5306-00-149-9994 was assigned to the Federal Catalog?
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Pricing
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