HT4057-6L8A

View detailed technical data, stock status, and sourcing information for: HT4057-6L8A
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-241-0755

Item Name Code

29294

Assigment Date

09/22/1986 (39 years ago)

A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.

flat countersunk head style, 0.616 inches minimum and 0.666 inches maximum thread length, right-hand thread direction, 3a thread class, 1.126 inches minimum and 1.156 inches maximum fastener 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: 3a
Thread Direction: right-hand
Thread Length: 0.616 inches minimum and 0.666 inches maximum
Fastener Length: 1.126 inches minimum and 1.156 inches maximum
Head Style: flat countersunk
Head Diameter: 0.692 inches minimum and 0.763 inches maximum
Grip Diameter: 0.3735 inches minimum and 0.3745 inches maximum
Internal Drive Style: high-torque
Nominal Thread Diameter: 0.375 inches
Grip Length: 0.490 inches minimum and 0.510 inches maximum
Thread Quantity Per Inch: 24
Minimum Tensile Strength: 125000 pounds per square inch
Countersink Angle: 99.0 degrees minimum and 101.0 degrees maximum
Special Features: with cetyl alcohol per mil-l-87132 type 1 gr b
Material: steel comp xm-13 overall
Material Document And Classification: ams5629 assn std single material response overall
Surface Treatment: aluminum and chromate overall
Surface Treatment Document And Classification: mil-c-83488 type 2 class 3 mil spec single treatment response overall
Thread Series Designator: unjf

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5305-01-145-8395	No Name Available	06/01/1991
5305-01-372-4720	No Name Available	10/01/1996

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
11931-6L8	Close Tolerance Screw
CHT4057-6-8	Close Tolerance Screw
HT4057-6-78	Close Tolerance Screw
HT4057-6-8	Close Tolerance Screw
HT4057-6-8A	Close Tolerance Screw
HT4057-6L8A	Close Tolerance Screw
ST3M733-6L8	Close Tolerance Screw
WC4057-6-8	Close Tolerance Screw
WC5057-6-8	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-241-0755?

The FSCG of the NSN 5305-01-241-0755 is 5305

Does the NSN 5305-01-241-0755 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-241-0755 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 5305-01-241-0755 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-241-0755 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 5305-01-241-0755 was assigned to the Federal Catalog?

It was assigned 39 years ago, on Mon, Sep 22, 1986