HT271A4-14

View detailed technical data, stock status, and sourcing information for: HT271A4-14
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-132-1065

Item Name Code

29294

Assigment Date

05/22/1982 (44 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 undercut head style, 1.328 inches minimum and 1.375 inches maximum fastener length, 0.443 inches minimum and 0.510 inches maximum thread length, right-hand thread direction

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: 0.443 inches minimum and 0.510 inches maximum
Fastener Length: 1.328 inches minimum and 1.375 inches maximum
Head Style: flat countersunk undercut
Head Diameter: 0.502 inches minimum and 0.507 inches maximum
Head Height: 0.071 inches minimum and 0.073 inches maximum
Grip Diameter: 0.2490 inches minimum and 0.2495 inches maximum
Internal Drive Style: high-torque
Nominal Thread Diameter: 0.250 inches
Grip Length: 0.865 inches minimum and 0.885 inches maximum
Thread Quantity Per Inch: 28
Countersink Angle: 100.0 degrees nominal
Surface Finish: 32.0 microinches grip
Surface Finish: 32.0 microinches threads
Special Features: furnish with one o ring
Material: titanium alloy overall
Material Document And Classification: nas621 assn std single material 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
10115316	Close Tolerance Screw
110179-4-14AS	Close Tolerance Screw
BM33024V4-14U	Close Tolerance Screw
HT271A4-14	Close Tolerance Screw
HT8137-4-14AS	Close Tolerance Screw
ST3M430V4-14AS	Close Tolerance Screw
WC8137-4-14A	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-132-1065?

The FSCG of the NSN 5305-01-132-1065 is 5305

Does the NSN 5305-01-132-1065 have a Schedule B code assigned?

Yes, the Schedule B code is 8109900000

Does NSN 5305-01-132-1065 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 5305-01-132-1065 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-132-1065 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 5305-01-132-1065 was assigned to the Federal Catalog?

It was assigned 44 years ago, on Sat, May 22, 1982