NAS1801-4D40
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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.
right-hand thread direction, hexagon head style, 3a thread class, 2.460 inches minimum and 2.531 inches maximum thread length, 2.484 inches minimum and 2.531 inches maximum fastener 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
- 2.460 inches minimum and 2.531 inches maximum
- Fastener Length
- 2.484 inches minimum and 2.531 inches maximum
- Head Style
- hexagon
- Head Height
- 0.125 inches minimum and 0.140 inches maximum
- Width Between Flats
- 0.367 inches minimum and 0.376 inches maximum
- Hole Diameter
- 0.046 inches minimum and 0.056 inches maximum
- Internal Drive Style
- cross recess type 1
- Nominal Thread Diameter
- 0.250 inches
- Hole Quantity
- 3
- Thread Quantity Per Inch
- 28
- Minimum Tensile Strength
- 160000 pounds per square inch
- Hardness Rating
- 36.0 rockwell c minimum and 40.0 rockwell c maximum
- Part Name Assigned By Controlling Agency
- navy special project
- Screw Material
- steel comp e4340 or steel comp 8740
- Screw Material Document And Classification
- mil-s-5000 mil spec 1st material response or mil-s-6049 mil spec 2nd material response or ams6322 assn std 2nd material response
- Screw Surface Treatment
- cadmium and chromate
- Screw Surface Treatment Document And Classification
- qq-p-416,ty2,cl2 fed spec single treatment response
- Head Hole Configuration Style
- hexagon corners
- Thread Series Designator
- unjf
- Specification/Standard Data
- 80205-nas1801 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 |
|---|---|
| NAS1801-4D40 | Machine Screw |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 5305-01-205-3409?
Does the NSN 5305-01-205-3409 have a Schedule B code assigned?
Does NSN 5305-01-205-3409 require demilitarization?
Does NSN 5305-01-205-3409 contain precious materials?
Does NSN 5305-01-205-3409 contain hazardous materials?
When the NSN 5305-01-205-3409 was assigned to the Federal Catalog?
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