SM-B-621268

View detailed technical data, stock status, and sourcing information for: SM-B-621268
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-100-1149

Item Name Code

06657

Assigment Date

08/28/1980 (45 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.

0.188 inches nominal thread length, 2a thread class, pan no. 2 head style, 0.188 inches nominal fastener length, right-hand thread direction

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: 0.188 inches nominal
Fastener Length: 0.188 inches nominal
Head Style: pan no. 2
Head Diameter: 0.205 inches minimum and 0.219 inches maximum
Head Height: 0.058 inches minimum and 0.068 inches maximum
Internal Drive Style: slot
Nominal Thread Diameter: 0.112 inches
Thread Quantity Per Inch: 40
Screw Material: steel comp 1010
Screw Material Document And Classification: qq-s-634 fed spec single material response
Screw Surface Treatment: cadmium
Screw Surface Treatment Document And Classification: mil-f-14072 -262 mil spec single treatment response
Thread Series Designator: unc

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
10309672	Machine Screw
SM-B-621268	Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-01-100-1149?

The FSCG of the NSN 5305-01-100-1149 is 5305

Does the NSN 5305-01-100-1149 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-100-1149 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 5305-01-100-1149 contain precious materials?

Precious metal content is unknown

Does NSN 5305-01-100-1149 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 5305-01-100-1149 was assigned to the Federal Catalog?

It was assigned 45 years ago, on Thu, Aug 28, 1980