5305-01-370-1621
Find complete technical information, availability, and procurement data for: 5305-01-370-1621
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A washer of any peripheral shape having a centrally located hole. Both bearing surfaces are parallel and flat, but one or both of the bearing surfaces must be broken by a counterbore, countersink, or similarly shaped recess. The thickness must not exceed 25 per cent of the outside diameter or the largest outside dimension. The maximum limit of the tolerance or range applied to the thickness and/or largest outside dimension must be used to determine compliance. Excludes:washer, concave, retainer, packing, and thrust type washers. See also spacer, sleeve; and spacer, stepped.
flat countersunk head style, right-hand thread direction, 3a thread class, 2.013 inches minimum and 2.043 inches maximum fastener length, 0.403 inches nominal 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
- 0.403 inches nominal
- Fastener Length
- 2.013 inches minimum and 2.043 inches maximum
- Head Style
- flat countersunk
- Head Diameter
- 0.350 inches minimum and 0.399 inches maximum
- Grip Diameter
- 0.2485 inches minimum and 0.2495 inches maximum
- Internal Drive Style
- offset cruciform (torque set)
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 1.615 inches minimum and 1.635 inches maximum
- Thread Quantity Per Inch
- 28
- Minimum Tensile Strength
- 160000 pounds per square inch
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Surface Finish
- 32.0 microinches grip32.0 microinches threads
- Material
- steel comp 4140 or steel comp e4340 or steel comp 8740 overall
- Material Document And Classification
- mil-s-5626 mil spec 1st material response or mil-s-5000 mil spec 2nd material response or mil-s-6049 mil spec 3rd material response overall
- Surface Treatment
- cadmium and chromate overall
- Surface Treatment Document And Classification
- qq-p-416,ty 2 cl 2 fed spec single treatment response overall
- Thread Series Designator
- unjf
- Specification/Standard Data
- 80205-nas1581 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 |
|---|---|
| 5305PL0784927 | Close Tolerance Screw |
| NAS1581A4T26 | Close Tolerance Screw |
| NAS1581F4T26 | Close Tolerance Screw |
FAQs
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