5305-01-265-8955

Find complete technical information, availability, and procurement data for: 5305-01-265-8955
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-265-8955

Item Name Code

29294

Assigment Date

10/19/1987 (38 years ago)

A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)

0.228 inches minimum and 0.378 inches maximum thread length, 1.228 inches minimum and 1.248 inches maximum fastener length, right-hand thread direction, flat countersunk head style, 3a thread class

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: 0.228 inches minimum and 0.378 inches maximum
Fastener Length: 1.228 inches minimum and 1.248 inches maximum
Head Style: flat countersunk
Head Diameter: 0.577 inches minimum and 0.635 inches maximum
Locking Feature: detent ball grip
Grip Diameter: 0.3108 inches minimum and 0.317 inches maximum
Shank Unthreaded Hole Diameter: 0.076 inches minimum and 0.086 inches maximum first hole
Internal Drive Style: offset cruciform (torque set)
Nominal Thread Diameter: 0.312 inches
Grip Length: 0.750 inches minimum and 0.766 inches maximum
Thread Quantity Per Inch: 24
Hardness Rating: 36.0 rockwell c minimum and 41.0 rockwell c maximum overall
Countersink Angle: 99.0 degrees minimum and 101.0 degrees maximum
Distance From Head Largest Bearing Surface To Shank Hole Center: 1.123 inches minimum and 1.138 inches maximum first hole
Surface Finish: 32.0 microinches bearing surface of head
Surface Finish: 32.0 microinches grip
Surface Finish: 32.0 microinches threads
Special Features: internal drive ribbed
Material: steel comp 630 or steel comp 631 or steel comp 440c locking feature
Material: steel comp e4340 or steel comp 4140 or steel comp 8740 or steel comp 4130 or steel comp 6150 fastener
Material Document And Classification: ams5643 assn std 1st material response or ams5644 assn std 2nd material response or qq-s-763 fed spec 3rd material response locking feature
Surface Treatment: cadmium and chromate fastener
Surface Treatment: passivate locking feature
Surface Treatment Document And Classification: qq-p-35 fed spec single treatment response locking feature
Surface Treatment Document And Classification: qq-p-416 ty2 cl2 fed spec single treatment response fastener
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
123256-5R2512	Close Tolerance Screw
AS303-25-12	Close Tolerance Screw
LE111-0044-2512	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-265-8955?

The FSCG of the NSN 5305-01-265-8955 is 5305

Does the NSN 5305-01-265-8955 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-265-8955 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 5305-01-265-8955 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-265-8955 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 5305-01-265-8955 was assigned to the Federal Catalog?

It was assigned 38 years ago, on Mon, Oct 19, 1987