5340-01-391-1638

Find complete technical information, availability, and procurement data for: 5340-01-391-1638
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5340 Commercial Hardware

National Stock Number

5340-01-391-1638

Item Name Code

40280

Assigment Date

06/06/1994 (32 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.

right-hand right external thread direction, 0.250 inches minimum left internal (includes thru thread) thread length, right-hand left internal (includes thru thread) thread direction, 2a right external thread class, 2b left internal (includes thru thread) 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 right external
Thread Class: 2b left internal (includes thru thread)
Thread Direction: right-hand right external
Thread Direction: right-hand left internal (includes thru thread)
Thread Length: 0.250 inches minimum left internal (includes thru thread)
Thread Length: 0.135 inches nominal right external
Groove Diameter: 0.190 inches nominal
Length: 1.195 inches minimum and 1.205 inches maximum
Cross-Sectional Shape: hexagon
Width Across Flats: 0.312 inches nominal
Distance From End To Groove: 0.200 inches nominal
Smaller Groove Width: 0.030 inches maximum
Smaller Groove Diameter: 0.117 inches minimum and 0.123 inches maximum
Thread Quantity Per Inch: 32 left internal (includes thru thread)
Thread Quantity Per Inch: 32 right external
Nominal Thread Size: 0.164 inches left internal (includes thru thread)
Nominal Thread Size: 0.164 inches right external
Material: steel comp 4130 overall
Material Document And Classification: mil-s-6758 cond f and a mil spec single material response overall
Surface Treatment: tin overall
Surface Treatment Document And Classification: mil-t-10727 ty 1 mil spec single treatment response overall
Thread Series Designator: unc left internal (includes thru thread)
Thread Series Designator: unc right external

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
5187334	Spacing Threaded Standoff

FAQs

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

What is the FSCG of the NSN 5340-01-391-1638?

The FSCG of the NSN 5340-01-391-1638 is 5340

Does NSN 5340-01-391-1638 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 5340-01-391-1638 contain precious materials?

Item does not contain precious metal.

Does NSN 5340-01-391-1638 contain hazardous materials?

Indicates there is no information in the hmirs. The nsn is in a fsc in table ii of fed std 313 and a msds may be required by the user. The requirement for a msds is dependent on a hazard determination of the supplier or the intended end use of item.

When the NSN 5340-01-391-1638 was assigned to the Federal Catalog?

It was assigned 32 years ago, on Mon, Jun 6, 1994