5305-01-398-1271
Find complete technical information, availability, and procurement data for: 5305-01-398-1271
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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.
pan head style, right-hand thread direction, 0.719 inches minimum and 0.750 inches maximum fastener length, 0.719 inches minimum and 0.750 inches maximum thread 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
- 0.719 inches minimum and 0.750 inches maximum
- Fastener Length
- 0.719 inches minimum and 0.750 inches maximum
- Head Style
- pan
- Head Diameter
- 0.473 inches minimum and 0.492 inches maximum
- Head Height
- 0.162 inches minimum and 0.175 inches maximum
- Locking Feature
- patch
- Internal Drive Style
- torque set
- Nominal Thread Diameter
- 0.250 inches
- Thread Quantity Per Inch
- 28
- Minimum Tensile Strength
- 160000 pounds per square inch
- Screw Material
- steel comp 4140 or steel comp 4340 or steel comp 8740
- Locking Feature Material
- plastic polyamide (nylon)
- Screw Material Document And Classification
- mil-s-5626 mil spec 1st material response or mil-s-8844 mil spec 2nd material response or ams 6414 assn std 2nd material response or mil-s-6049 mil spec 3rd material response
- Screw Surface Treatment
- cadmium
- Screw Surface Treatment Document And Classification
- qq-p-416 ty 1 fed spec single treatment response
- Thread Series Designator
- unjf
- Specification/Standard Data
- 80205-nas1190 professional/industrial association standard
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 |
|---|---|
| NAS1190-4T12BW | Machine Screw |
FAQs
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