5305-01-007-8755

Find complete technical information, availability, and procurement data for: 5305-01-007-8755
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-007-8755

Item Name Code

18257

Assigment Date

08/10/1975 (50 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.

0.844 inches minimum and 0.875 inches maximum fastener length, right-hand thread direction, 0.875 inches maximum thread length, 2a thread class, hexagon 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: 2a
Thread Direction: right-hand
Thread Length: 0.875 inches maximum
Fastener Length: 0.844 inches minimum and 0.875 inches maximum
Head Style: hexagon
Head Height: 0.150 inches minimum and 0.163 inches maximum
Width Between Flats: 0.428 inches minimum and 0.438 inches maximum
Shank Unthreaded Hole Diameter: 0.074 inches minimum and 0.082 inches maximum first hole
Nominal Thread Diameter: 0.250 inches
Thread Quantity Per Inch: 20
Minimum Tensile Strength: 70000 pounds per square inch
Hardness Rating: 235.0 brinell standard maximum overall
Minimum Yield Strength: 40000 pounds per square inch
Distance From Head Largest Bearing Surface To Shank Hole Center: 0.725 inches minimum and 0.776 inches maximum first hole
Surface Finish: 63.0 microinches threads
Material: steel comp 403 or steel comp 405 or steel comp 410 or steel comp 414 or steel comp 416 or steel comp 416se or steel comp 420 or steel comp 430 or steel comp 431 or steel comp 440a or steel comp 440b or steel comp 440c or steel comp 446 or steel comp 430f overall
Surface Treatment: passivate overall
Surface Treatment Document And Classification: qq-p-35 fed spec single treatment response overall
Thread Series Designator: unc
Nondefinitive Spec/Std Data: 2 type and 10p style

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
MS51109-7	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-007-8755?

The FSCG of the NSN 5305-01-007-8755 is 5305

Does the NSN 5305-01-007-8755 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-007-8755 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 5305-01-007-8755 contain precious materials?

Precious metal content is unknown

Does NSN 5305-01-007-8755 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 5305-01-007-8755 was assigned to the Federal Catalog?

It was assigned 50 years ago, on Sun, Aug 10, 1975