5305-01-250-7949

Find complete technical information, availability, and procurement data for: 5305-01-250-7949
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-250-7949

Item Name Code

06657

Assigment Date

03/07/1987 (39 years ago)

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.

flat countersunk head style, right-hand thread direction, 1.173 inches minimum and 1.218 inches maximum fastener length, 0.720 inches minimum and 0.795 inches maximum thread length, 3a 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: 3a
Thread Direction: right-hand
Thread Length: 0.720 inches minimum and 0.795 inches maximum
Fastener Length: 1.173 inches minimum and 1.218 inches maximum
Head Style: flat countersunk
Head Diameter: 0.932 inches minimum and 1.022 inches maximum
Internal Drive Style: cross recess type 1
Nominal Thread Diameter: 0.500 inches
Thread Quantity Per Inch: 20
Minimum Tensile Strength: 160000 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 8740 or steel comp 8630 or steel comp 8735 or steel comp 4130
Screw Surface Treatment: cadmium and chromate
Screw Surface Treatment Document And Classification: qq-p-416 ty 2 cl2 fed spec single treatment response
Thread Series Designator: unjf
Specification/Standard Data: 80205-nas517 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
NAS517-8-7	Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-01-250-7949?

The FSCG of the NSN 5305-01-250-7949 is 5305

Does the NSN 5305-01-250-7949 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-250-7949 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 5305-01-250-7949 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-250-7949 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 5305-01-250-7949 was assigned to the Federal Catalog?

It was assigned 39 years ago, on Sat, Mar 7, 1987