21429-3
View detailed technical data, stock status, and sourcing information for: 21429-3
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A high strength, 160,000 pounds per square inch (1100 megapascals) minimum tensile strength externally threaded fastener designed for use in applications involving great shear stress. The head is designed to accommodate an external wrench or driver. The head is not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. The unthreaded portion is of specific grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (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. A locking feature may be incorporated in the design of the head or threads. See bolt, machine and bolt, clevis.
0.250 inches nominal fastener length, 3a thread class, cup point style, headless (setscrew) head style, 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
- Fastener Length
- 0.250 inches nominal
- Head Style
- headless (setscrew)
- Point Style
- cup
- Internal Drive Style
- slot
- Nominal Thread Diameter
- 0.138 inches
- Thread Quantity Per Inch
- 32
- Hardness Rating
- 45.0 rockwell c minimum and 53.0 rockwell c maximum overall
- Material
- steel comp 4032 or steel comp 4037 or steel comp 4137 or steel comp 4140 or steel comp 8630 or steel comp 8740 overall
- Surface Treatment
- cadmium and chromate overall
- Surface Treatment Document And Classification
- qq-p-416 ty 2,cl 3 fed spec single treatment response overall
- Thread Series Designator
- unc
- Nondefinitive Spec/Std Data
- 1 type and 4 style
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FAQs
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What is the FSCG of the NSN 5305-01-321-6670?
Does the NSN 5305-01-321-6670 have a Schedule B code assigned?
Does NSN 5305-01-321-6670 require demilitarization?
Does NSN 5305-01-321-6670 contain precious materials?
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When the NSN 5305-01-321-6670 was assigned to the Federal Catalog?
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