HT8171-6-9
View detailed technical data, stock status, and sourcing information for: HT8171-6-9
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A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.
right-hand thread direction, 0.534 inches minimum and 0.601 inches maximum thread length, flat countersunk head style, 1.106 inches minimum and 1.153 inches maximum fastener length, 3a thread class
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
- 0.534 inches minimum and 0.601 inches maximum
- Fastener Length
- 1.106 inches minimum and 1.153 inches maximum
- Head Style
- flat countersunk
- Head Diameter
- 0.698 inches minimum and 0.762 inches maximum
- Grip Diameter
- 0.3733 inches minimum and 0.3742 inches maximum
- Shank Unthreaded Hole Diameter
- 0.106 inches nominal first hole
- Internal Drive Style
- high-torque
- Nominal Thread Diameter
- 0.375 inches
- Grip Length
- 0.552 inches minimum and 0.572 inches maximum
- Thread Quantity Per Inch
- 24
- Minimum Tensile Strength
- 220000 pounds per square inch
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Distance From Head Largest Bearing Surface To Shank Hole Center
- 0.813 inches minimum and 0.845 inches maximum first hole
- Material
- steel overall
- Material Document And Classification
- sps-m-107 fscm 56878 mfr ref single material response overall
- Surface Treatment
- cadmium overall
- Surface Treatment Document And Classification
- nas 672 assn std 1st treatment response or mil-c-8837 ty 2 cl 2 mil spec 2nd 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 |
|---|---|
| 106706H6-9 | Close Tolerance Screw |
| GB510BC6-9 | Close Tolerance Screw |
| HT8171-6-9 | Close Tolerance Screw |
| HT8171H6-9 | Close Tolerance Screw |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5305-00-211-9249?
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Does NSN 5305-00-211-9249 require demilitarization?
Does NSN 5305-00-211-9249 contain precious materials?
Does NSN 5305-00-211-9249 contain hazardous materials?
When the NSN 5305-00-211-9249 was assigned to the Federal Catalog?
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