5305-01-301-7838

Find complete technical information, availability, and procurement data for: 5305-01-301-7838
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-301-7838

Item Name Code

06660

Assigment Date

06/02/1989 (37 years ago)

An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. The threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. For items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, bolt, shear. See also screw, cap, hexagon head and screw, machine.

pan head style, 0.218 inches minimum and 0.250 inches maximum fastener length, right-hand thread direction, 0.125 inches minimum thread length, 2a 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: 2a
Thread Direction: right-hand
Thread Length: 0.125 inches minimum
Fastener Length: 0.218 inches minimum and 0.250 inches maximum
Head Style: pan
Head Diameter: 0.256 inches minimum and 0.270 inches maximum
Head Height: 0.087 inches minimum and 0.097 inches maximum
Washer Quantity: 2
Internal Drive Style: cross recess type 1
Nominal Thread Diameter: 0.138 inches
Thread Quantity Per Inch: 32
Secondary Washer Relationship To Primary Washer: not identical
Secondary Washer Style: flat
Primary Washer Outside Diameter: 0.250 inches maximum
Secondary Washer Outside Diameter: 0.253 inches minimum and 0.263 inches maximum
Primary Washer Style: split helical ring
Primary Washer Material Thickness: 0.031 inches minimum
Secondary Washer Material Thickness: 0.013 inches minimum and 0.019 inches maximum
Material: steel comp 302 or steel comp 304 fastener
Material: steel comp 302 or steel comp 304 primary washer
Material: steel comp 302 or steel comp 304 secondary washer
Material Document And Classification: mil-s-5059 mil spec all material responses primary washer
Material Document And Classification: qq-s-763 cond b fed spec 1st material response or qq-s-763 cond a fed spec 2nd material response fastener
Surface Treatment: passivate fastener
Surface Treatment: passivate primary washer
Surface Treatment: passivate secondary washer
Surface Treatment Document And Classification: qq-p-35 fed spec single treatment response fastener
Surface Treatment Document And Classification: qq-p-35 fed spec single treatment response primary washer
Surface Treatment Document And Classification: qq-p-35 fed spec single treatment response secondary washer
Thread Series Designator: unc
Specification/Standard Data: 80205-nas1301 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
NAS1301C6-4	Assembled Washer Screw

FAQs

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

What is the FSCG of the NSN 5305-01-301-7838?

The FSCG of the NSN 5305-01-301-7838 is 5305

Does the NSN 5305-01-301-7838 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-301-7838 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 5305-01-301-7838 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-301-7838 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 5305-01-301-7838 was assigned to the Federal Catalog?

It was assigned 37 years ago, on Fri, Jun 2, 1989