ST25D31-19-4
View detailed technical data, stock status, and sourcing information for: ST25D31-19-4
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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.
0.255 inches minimum and 0.257 inches maximum shank diameter, 3b thread class, blind rivet, nut and bolt (assembly) shank style, right-hand thread direction, flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style
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
- Head Style
- flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer)
- Shank Diameter
- 0.255 inches minimum and 0.257 inches maximum
- Shank Style
- blind rivet, nut and bolt (assembly)
- Head Major Diameter
- 0.312 inches minimum and 0.317 inches maximum
- Expansion Device
- threaded sleeve
- Grip Length
- 0.250 inches maximum
- Thread Quantity Per Inch
- 32
- Nominal Thread Size
- 0.164 inches
- Countersink Angle
- 98.0 degrees minimum and 101.0 degrees maximum
- Special Features
- furnished w/o bolt
- Material
- steel comp 431 expander
- Material
- steel comp 305 sleeve
- Material Document And Classification
- mil-s18732 mil spec single material response expander
- Material Document And Classification
- qq-s-763 fed spec single material response sleeve
- Surface Treatment
- cadmium expander
- Surface Treatment Document And Classification
- qq-p-416,ty 1,cl 3 fed spec single treatment response expander
- Thread Series Designator
- unjc
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 |
|---|---|
| BN360-832-4 | Blind Rivet |
| ST25D31-19-4 | Blind Rivet |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5320-00-446-1612?
Does the NSN 5320-00-446-1612 have a Schedule B code assigned?
Does NSN 5320-00-446-1612 require demilitarization?
Does NSN 5320-00-446-1612 contain precious materials?
Does NSN 5320-00-446-1612 contain hazardous materials?
When the NSN 5320-00-446-1612 was assigned to the Federal Catalog?
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