HT181-4-20
View detailed technical data, stock status, and sourcing information for: HT181-4-20
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A grouping of two or more different types of electrical/electronic components mounted on a common mounting. It may include an assembly of electrical/electronic components mounted on multiple printed wiring board(s) mounted back to back, stacked, and the like. The item is generally a component of a subassembly and cannot be assigned a more definite item name. Excludes:items which may be identified as a subassembly. For an assembly of electrical/electronic components mounted on a single printed wiring board, see circuit card asseembly. Do not use if a more specific name applies.
flat countersunk head style, 3a thread class, right-hand thread direction, 0.469 inches nominal thread length, 1.703 inches minimum and 1.750 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
- 3a
- Thread Direction
- right-hand
- Thread Length
- 0.469 inches nominal
- Fastener Length
- 1.703 inches minimum and 1.750 inches maximum
- Head Style
- flat countersunk
- Head Diameter
- 0.464 inches minimum and 0.507 inches maximum
- Grip Diameter
- 0.2485 inches minimum and 0.2495 inches maximum
- Point Length
- 0.050 inches nominal
- Point Style
- flat
- Internal Drive Style
- high-torque
- Nominal Thread Diameter
- 0.2500 inches
- Grip Length
- 1.240 inches minimum and 1.260 inches maximum
- Thread Quantity Per Inch
- 28
- Minimum Tensile Strength
- 6400 pounds per square inch
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Surface Finish
- 32.0 microinches bearing surface of head
- Surface Finish
- 32.0 microinches grip
- Surface Finish
- 32.0 microinches threads
- Material
- steel overall
- Material Document And Classification
- nas498 assn std single material response overall
- Surface Treatment
- cadmium overall
- Surface Treatment Document And Classification
- nas672 assn std single treatment response overall
- Thread Series Designator
- unjf
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 |
|---|---|
| HT181-4-20 | Close Tolerance Screw |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5305-01-520-3102?
Does the NSN 5305-01-520-3102 have a Schedule B code assigned?
Does NSN 5305-01-520-3102 require demilitarization?
Does NSN 5305-01-520-3102 contain precious materials?
Does NSN 5305-01-520-3102 contain hazardous materials?
When the NSN 5305-01-520-3102 was assigned to the Federal Catalog?
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