ANSI B18.3-1/4X1 SCSH STEEL

Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-432-1761

Item Name Code

16282

Assigment Date

05/29/1996 (29 years ago)

An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes:items with bevel (conical) heads. See bolt, internal wrenching. Excludes:screw, shoulder; and screw, machine.

3a thread class, 1.000 inches nominal fastener length, right-hand thread direction, flat chamfer head style, 0.900 inches maximum thread length

Characteristics

Below are the official specifications and performance details for this part, including technical data, material composition, and compliance information.

Thread Class: 3a
Thread Direction: right-hand
Thread Length: 0.900 inches maximum
Fastener Length: 1.000 inches nominal
Head Style: flat chamfer
Head Diameter: 0.365 inches minimum and 0.375 inches maximum
Head Height: 0.244 inches minimum and 0.250 inches maximum
Internal Drive Style: hexagon
Nominal Thread Diameter: 0.250 inches
Width Across Flats: 0.188 inches nominal
Thread Quantity Per Inch: 20
Minimum Tensile Strength: 180000 pounds per square inch
Hardness Rating: 39.0 rockwell c minimum and 45.0 rockwell c maximum overall
Color: black overall
Material: steel uns k03104 overall
Material Document And Classification: astm a574 assn std single material response overall
Surface Treatment: oxide overall
Thread Series Designator: unc

Related Parts & Specifications

This NSN includes a range of related parts designed for specific operational needs. Review each item below to find in-depth specifications, functional details, and guidance for correct application and replacement.

Part Number	Name
1/4-20X1 SHCS	Socket Head Cap Screw
91251A542	Socket Head Cap Screw
ANSI B18.3-1/4X1 SCSH STEEL	Socket Head Cap Screw

FAQs

Get insights on installation procedures, operating conditions, care instructions, industry regulations, and common issues. FAQs below provide key information for ANSI B18.3-1/4X1 SCSH STEEL

What is the FSCG of the NSN 5305-01-432-1761?

The FSCG of the NSN 5305-01-432-1761 is 5305

Does the NSN 5305-01-432-1761 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-432-1761 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 5305-01-432-1761 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-432-1761 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 5305-01-432-1761 was assigned to the Federal Catalog?

It was assigned 29 years ago, on Wed, May 29, 1996