ST3M442-5A3
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A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The maximum tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use shim. For items fabricated from ceramic or electrically rated materials by specification or industry standards use insulator (1), washer. Excludes:disk, valve, graphite impregnated and lubricated items.
prevailing torque all metal design locking feature, 0.317 inches minimum nut counterbore diameter, right-hand thread direction, 3b thread class, dry film lubricant lubrication
Product Characteristics
Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.
- Thread Class
- 3b
- Thread Direction
- right-hand
- Locking Feature
- prevailing torque all metal design
- Counterbore Diameter
- 0.317 inches minimum nut
- Lubrication
- dry film lubricant
- Mounting Hole Diameter
- 0.130 inches minimum and 0.135 inches maximum
- Nut Style
- plate
- Nut Length
- 1.396 inches maximum
- Nut Height
- 0.449 inches maximum
- Plate Thickness
- 0.036 inches minimum and 0.044 inches maximum
- Plate Width
- 0.650 inches maximum
- Removable Nut Manufacturer Code
- 76301
- Nut Counterbore Depth
- 0.183 inches minimum nut
- Nut Mounting Provision
- straight holes
- Mounting Hole Arrangement Style
- 2 holes
- Distance From Aperture Center To Mounting Hole Center
- 0.495 inches minimum and 0.505 inches maximum
- Center To Center Distance Between Mounting Holes Along Length
- 0.310 inches minimum and 0.314 inches maximum
- Removable Nut Manufacturer Part Number
- st3m445c5m3
- Thread Series
- unjf
- Thread Quantity Per Inch
- 24
- Nominal Thread Size
- 0.312 inches
- Material
- iron alloy 660 overall
- Material Document And Classification
- ams 5525 assn std single material response or ams 5732 assn std single material response overall
- Surface Treatment
- passivate base
- Surface Treatment
- nickel or copper or nickel and copper nut
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 |
|---|---|
| 10110210 | Plate Self-Locking Nut |
| BFN442-5-3 | Plate Self-Locking Nut |
| F18427L3-5 | Plate Self-Locking Nut |
| F49251E5-3 | Plate Self-Locking Nut |
| NS202042-054-5 | Plate Self-Locking Nut |
| ST3M442-5A3 | Plate Self-Locking Nut |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5310-01-244-1065?
Does the NSN 5310-01-244-1065 have a Schedule B code assigned?
Does NSN 5310-01-244-1065 require demilitarization?
Does NSN 5310-01-244-1065 contain precious materials?
Does NSN 5310-01-244-1065 contain hazardous materials?
When the NSN 5310-01-244-1065 was assigned to the Federal Catalog?
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- AS9120 Quality Standards
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