HR246-3-6A

View detailed technical data, stock status, and sourcing information for: HR246-3-6A
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-329-9743

Item Name Code

29294

Assigment Date

11/28/1990 (35 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.

3a thread class, flat countersunk head style, right-hand thread direction, 0.363 inches nominal thread length, 0.723 inches minimum and 0.753 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: 0.363 inches nominal
Fastener Length: 0.723 inches minimum and 0.753 inches maximum
Head Style: flat countersunk
Head Diameter: 0.3825 inches minimum and 0.3911 inches maximum
Grip Diameter: 0.1885 inches minimum and 0.1895 inches maximum
Internal Drive Style: offset cruciform (torque set)
Nominal Thread Diameter: 0.190 inches
Grip Length: 0.365 inches minimum and 0.385 inches maximum
Thread Quantity Per Inch: 32
Countersink Angle: 129.0 degrees minimum and 131.0 degrees maximum
Surface Finish: 32.0 microinches bearing surface of head
Surface Finish: 32.0 microinches grip
Surface Finish: 32.0 microinches threads
Material: titanium alloy uns r56400 overall
Material Document And Classification: ams 4928 assn std single material response or ams 4967 assn std single material response overall
Surface Treatment: aluminum overall
Surface Treatment Document And Classification: nas 4006 assn std single treatment response overall
Thread Series Designator: unjf

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
03A225-3-6A	Close Tolerance Screw
123992-3-6A	Close Tolerance Screw
AIC1700-3-6A	Close Tolerance Screw
DF33001VA-3T-6	Close Tolerance Screw
HR246-3-6A	Close Tolerance Screw
PBF1484-3-6A	Close Tolerance Screw
SC5027-3-6A	Close Tolerance Screw
SLB212-3-6A	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-329-9743?

The FSCG of the NSN 5305-01-329-9743 is 5305

Does the NSN 5305-01-329-9743 have a Schedule B code assigned?

Yes, the Schedule B code is 8109900000

Does NSN 5305-01-329-9743 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 5305-01-329-9743 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-329-9743 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 5305-01-329-9743 was assigned to the Federal Catalog?

It was assigned 35 years ago, on Wed, Nov 28, 1990