5305-01-186-4550

Find complete technical information, availability, and procurement data for: 5305-01-186-4550
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-186-4550

Item Name Code

29294

Assigment Date

08/10/1984 (41 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, 0.515 inches minimum and 0.555 inches maximum thread length, 1.213 inches minimum and 1.233 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: 0.515 inches minimum and 0.555 inches maximum
Fastener Length: 1.213 inches minimum and 1.233 inches maximum
Head Style: flat countersunk
Head Diameter: 0.508 inches maximum
Grip Diameter: 0.2490 inches minimum and 0.2495 inches maximum
Internal Drive Style: hexagon
Nominal Thread Diameter: 0.250 inches
Grip Length: 0.678 inches minimum and 0.698 inches maximum
Width Across Flats: 0.1565 inches minimum and 0.1587 inches maximum
Thread Quantity Per Inch: 28
Minimum Tensile Strength: 160000 pounds per square inch
Countersink Angle: 100.0 degrees nominal
Surface Finish: 32.0 microinches bearing surface of head
Surface Finish: 32.0 microinches grip
Surface Finish: 32.0 microinches threads
Special Features: 3 keyways 1.067 in. min. and 1.097 in. max long,0.040 in. min and 0.044 in. max wide machined in shank,bore machined in thread end to receive plug
Material: iron alloy 660 overall
Material Document And Classification: ams 5732 assn std single material response overall
Surface Treatment: passivate overall
Surface Treatment Document And Classification: qq-p-35 fed spec 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
CA2193-4-11	Close Tolerance Screw
FIT01-0002-4011	Close Tolerance Screw
LE111-0002-4011	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-186-4550?

The FSCG of the NSN 5305-01-186-4550 is 5305

Does the NSN 5305-01-186-4550 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-186-4550 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 5305-01-186-4550 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-186-4550 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 5305-01-186-4550 was assigned to the Federal Catalog?

It was assigned 41 years ago, on Fri, Aug 10, 1984