MS16998-75L
View detailed technical data, stock status, and sourcing information for: MS16998-75L
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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.
3a thread class, 1.210 inches minimum and 1.250 inches maximum fastener length, right-hand thread direction, flat chamfer head style, 1.127 inches minimum and 1.250 inches maximum thread 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
- 1.127 inches minimum and 1.250 inches maximum
- Fastener Length
- 1.210 inches minimum and 1.250 inches maximum
- Head Style
- flat chamfer
- Head Diameter
- 0.550 inches minimum and 0.562 inches maximum
- Head Height
- 0.368 inches minimum and 0.375 inches maximum
- Locking Feature
- strip or patch threads
- Internal Drive Style
- hexagon
- Nominal Thread Diameter
- 0.375 inches
- Width Across Flats
- 0.312 inches minimum and 0.316 inches maximum
- Thread Quantity Per Inch
- 24
- Minimum Tensile Strength
- 160000 pounds per square inch
- Material
- plastic locking feature
- Material
- steel fastener
- Surface Treatment
- cadmium and chromate fastener
- Surface Treatment Document And Classification
- qq-p-416 ty 2 cl 3 fed spec single treatment response fastener
- Thread Series Designator
- unjf
- Nondefinitive Spec/Std Data
- 6 type
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 |
|---|---|
| MS16998-75L | Socket Head Cap Screw |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5305-01-171-0538?
Does the NSN 5305-01-171-0538 have a Schedule B code assigned?
Does NSN 5305-01-171-0538 require demilitarization?
Does NSN 5305-01-171-0538 contain precious materials?
Does NSN 5305-01-171-0538 contain hazardous materials?
When the NSN 5305-01-171-0538 was assigned to the Federal Catalog?
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