5305-01-421-7078

Find complete technical information, availability, and procurement data for: 5305-01-421-7078
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-421-7078

Item Name Code

06657

Assigment Date

11/14/1995 (30 years ago)

A tubular shaped item with a round or hexagon peripheral shape having two flat bearing surfaces perpendicular to the axis of the centrally located hole. It is designed to maintain a predetermined distance between assembled parts. The item may be with or without flange(s) of any peripheral shape. The overall length must exceed 25 percent of the outside diameter or distance across peripheral flats of the body. (when the length, outside diameter, and/or distance across peripheral flats are designed as a tolerance, the maximum dimension will be used to determine compliance). For items having other than a round or hexagon peripheral shape, see spacer, plate. Excludes:items with lubricating features, see bearing, sleeve and bushing, sleeve. See also bushing, tapered; spacer, ring; washer, flat; and washer, (as modified).

3a thread class, 1.750 inches nominal thread length, right-hand thread direction, 2.250 inches nominal 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 nominal
Fastener Length: 2.250 inches nominal
Head Style: flat countersunk
Head Diameter: 0.332 inches minimum and 0.385 inches maximum
Internal Drive Style: cross recess type 1
Nominal Thread Diameter: 0.190 inches
Thread Quantity Per Inch: 32
Minimum Tensile Strength: 125000 pounds per square inch
Countersink Angle: 99.0 degrees minimum and 101.0 degrees maximum
Screw Material: steel comp 4130 or steel comp e4340 or steel comp 8740
Screw Material Document And Classification: mil-s-6758 mil spec single material response or mil-s-5000 mil spec single material response or mil-s-6049 mil spec single material response
Screw Surface Treatment: cadmium
Screw Surface Treatment Document And Classification: qq-p-416 ty1 cl2 fed spec single treatment response
Color: black
Thread Series Designator: unjf
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
NAS514P1032-36B	Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-01-421-7078?

The FSCG of the NSN 5305-01-421-7078 is 5305

Does the NSN 5305-01-421-7078 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-421-7078 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 5305-01-421-7078 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-421-7078 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 5305-01-421-7078 was assigned to the Federal Catalog?

It was assigned 30 years ago, on Tue, Nov 14, 1995