343130A1

View detailed technical data, stock status, and sourcing information for: 343130A1
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-148-2645

Item Name Code

18257

Assigment Date

03/03/1983 (43 years ago)

An externally threaded fastener designed for insertion into holes in assembled parts, for mating with a preformed internal thread and for tightening or releasing by torquing the head. The threaded and unthreaded portions are both of the same nominal diameter of 0.190 inch (5 mm) or larger. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. The thread length being the controlled dimension, the grip length is not specified. A locking feature may be incorporated in the design of the head or threads. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. Excludes:bolt,machine; bolt,externally relieved body; bolt,internal wrenching; and screw,cap,socket head.

1.220 inches minimum and 1.280 inches maximum fastener length, hexagon head style, right-hand thread direction, 2a thread class, 1.125 inches minimum 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: 1.125 inches minimum
Fastener Length: 1.220 inches minimum and 1.280 inches maximum
Head Style: hexagon
Head Height: 0.302 inches minimum and 0.323 inches maximum
Width Between Flats: 0.736 inches minimum and 0.750 inches maximum
Nominal Thread Diameter: 0.500 inches
Thread Quantity Per Inch: 13
Minimum Tensile Strength: 90000 pounds per square inch
Criticality Code Justification: zzzy
Material: iron alloy 660 overall
Material Document And Classification: sae assn std 1st material response or sae assn std 2nd material response or astm a449 assn std 3rd material response overall
Surface Treatment: cadmium overall
Special Test Features: special quality control testing
Surface Treatment Document And Classification: n2303a3 fscm 52022 mfr ref single treatment response overall
Test Data Document: "81349-mil-p-23199 specification (includes engineering type bulletins, brochures,etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "nominal", etc.)."
Thread Series Designator: unc
Reference Number Differentiating Characteristics: as differentiated by material which must conform to ships parts control center special quality control provisions

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
343130A1	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-148-2645?

The FSCG of the NSN 5305-01-148-2645 is 5305

Does the NSN 5305-01-148-2645 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-148-2645 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 5305-01-148-2645 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-148-2645 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 5305-01-148-2645 was assigned to the Federal Catalog?

It was assigned 43 years ago, on Thu, Mar 3, 1983