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5305-01-166-4418

Find complete technical information, availability, and procurement data for: 5305-01-166-4418

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5305-01-166-4418
Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5305 Screws
National Stock Number
5305-01-166-4418
Item Name Code
29294
Assigment Date
11/11/1983 (42 years ago)

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.

right-hand thread direction, 0.338 inches minimum and 0.388 inches maximum thread length, pan no. 2 head style, 3a thread class, 1.348 inches minimum and 1.378 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
0.338 inches minimum and 0.388 inches maximum
Fastener Length
1.348 inches minimum and 1.378 inches maximum
Head Style
pan no. 2
Head Diameter
0.360 inches minimum and 0.374 inches maximum
Head Height
0.115 inches minimum and 0.125 inches maximum
Grip Diameter
0.1885 inches minimum and 0.1895 inches maximum
Internal Drive Style
high-torque
Nominal Thread Diameter
0.190 inches
Grip Length
0.990 inches minimum and 1.010 inches maximum
Thread Quantity Per Inch
32
Minimum Tensile Strength
160000 pounds per square inch
Hardness Rating
36.0 rockwell c minimum and 40.0 rockwell c maximum overall
Surface Finish
32.0 microinches bearing surface of head
Surface Finish
32.0 microinches grip
Surface Finish
32.0 microinches threads
Material
steel comp e4340 or steel comp 4140 or steel comp 8740 or steel comp 8735 or steel comp 6150 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-nas1578 professional/industrial association standard

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Part Number Name
NAS1578A3H16 Close Tolerance Screw

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 5305-01-166-4418?
The FSCG of the NSN 5305-01-166-4418 is 5305
Does the NSN 5305-01-166-4418 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5305-01-166-4418 require demilitarization?
Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.
Does NSN 5305-01-166-4418 contain precious materials?
Item does not contain precious metal.
Does NSN 5305-01-166-4418 contain hazardous materials?
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
When the NSN 5305-01-166-4418 was assigned to the Federal Catalog?
It was assigned 42 years ago, on Fri, Nov 11, 1983

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