5305-01-256-6801
Find complete technical information, availability, and procurement data for: 5305-01-256-6801
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An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes:bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. See also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.
3a thread class, 1.750 inches minimum thread length, right-hand thread direction, 2.188 inches minimum and 2.250 inches maximum fastener length, flat countersunk 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
- 3a
- Thread Direction
- right-hand
- Thread Length
- 1.750 inches minimum
- Fastener Length
- 2.188 inches minimum and 2.250 inches maximum
- Head Style
- flat countersunk
- Head Diameter
- 0.447 inches minimum and 0.507 inches maximum
- Internal Drive Style
- cross recess type 1
- Nominal Thread Diameter
- 0.250 inches
- Thread Quantity Per Inch
- 28
- Minimum Tensile Strength
- 125000 pounds per square inch
- Hardness Rating
- 26.0 rockwell c minimum and 32.0 rockwell c maximum
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Screw Material
- steel comp 4037 or steel comp 8630
- Screw Material Document And Classification
- ams6300 assn std 1st material response or mil-s-6050 mil spec 2nd material response
- Screw Surface Treatment
- cadmium and chromate
- Screw Surface Treatment Document And Classification
- qq-p-416 ty 2 cl 2 fed spec single treatment response
- Thread Series Designator
- unf
- Specification/Standard Data
- 80205-nas514 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 |
|---|---|
| NAS514P428-36 | Machine Screw |
| NAS514P428-36P | Machine Screw |
FAQs
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