5305-00-178-8639

Find complete technical information, availability, and procurement data for: 5305-00-178-8639
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-178-8639

Item Name Code

22846

Assigment Date

02/18/1973 (53 years ago)

An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in.) (1.5 mm) or larger. It has a round unthreaded neck or shank all or part of which is of greater diameter than the threaded portion. The head is designed to be driven with either a wrench or an inserted driver or both in sizes below no. 10 (0.190 in.) (5 mm) nominal diameter. No. 10 (0.190 in.) (5 mm) and larger sizes must be designed for any type of inserted driver, but may also provide for external wrenching of the head. A locking feature may be incorporated in the design of the head or threads. For items which are both shouldered and have an externally relieved body, use screw, externally relieved body. For items with a no. 10 (0.190 in.) (5 mm) or larger thread diameter without an inserted driver head, use bolt, shoulder. Excludes:bolt, internal wrenching and screw, cap, socket head.

0.344 inches minimum and 0.346 inches maximum fastener length, flat chamfer head style, 2a thread class, right-hand thread direction, 0.156 inches nominal thread 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: 2a
Thread Direction: right-hand
Thread Length: 0.156 inches nominal
Fastener Length: 0.344 inches minimum and 0.346 inches maximum
Head Style: flat chamfer
Head Diameter: 0.250 inches nominal
Head Height: 0.125 inches nominal
Shoulder Diameter: 0.124 inches minimum and 0.125 inches maximum first shoulder
Shoulder Length: 0.188 inches minimum and 0.190 inches maximum first shoulder
Internal Drive Style: slot
Nominal Thread Diameter: 0.112 inches
Thread Quantity Per Inch: 40
Hardness Rating: 28.0 rockwell c minimum and 32.0 rockwell c maximum overall
Shoulder Shape: round first shoulder
Material: steel comp 416 overall
Thread Series Designator: unc

FAQs

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

What is the FSCG of the NSN 5305-00-178-8639?

The FSCG of the NSN 5305-00-178-8639 is 5305

Does the NSN 5305-00-178-8639 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-178-8639 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 5305-00-178-8639 contain precious materials?

Precious metal content is unknown

Does NSN 5305-00-178-8639 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 5305-00-178-8639 was assigned to the Federal Catalog?

It was assigned 53 years ago, on Sun, Feb 18, 1973