11839C4-8-17

View detailed technical data, stock status, and sourcing information for: 11839C4-8-17
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-216-9860

Item Name Code

29294

Assigment Date

09/20/1985 (40 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, right-hand thread direction, 0.954 inches minimum and 0.984 inches maximum fastener length, 0.444 inches minimum and 0.494 inches maximum thread length, flat countersunk head style

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: 0.444 inches minimum and 0.494 inches maximum
Fastener Length: 0.954 inches minimum and 0.984 inches maximum
Head Style: flat countersunk
Head Diameter: 0.497 inches minimum and 0.507 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: 0.490 inches minimum and 0.510 inches maximum
Thread Quantity Per Inch: 28
Countersink Angle: 99.0 degrees minimum and 101.0 degrees maximum
Special Features: thd hole in top of head 0.138-32 unjc-3b thd,hole 0.300 in. min. 0.345 in. max dp,counterbore 0.145 in. min. 0.150. in. max dia; injection port 0.120 in. lg,0.060 in. wide in unthd shank; distance from top of head to beginning of injection port 0.170 in.
Material: titanium alloy uns r56400 overall
Material Document And Classification: ams4928 assn std single material response or ams4967 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
11839C4-8-17	Close Tolerance Screw
3M1034V4-8-17	Close Tolerance Screw
HT4075V4-8-17	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-216-9860?

The FSCG of the NSN 5305-01-216-9860 is 5305

Does the NSN 5305-01-216-9860 have a Schedule B code assigned?

Yes, the Schedule B code is 8109900000

Does NSN 5305-01-216-9860 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 5305-01-216-9860 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-216-9860 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 5305-01-216-9860 was assigned to the Federal Catalog?

It was assigned 40 years ago, on Fri, Sep 20, 1985