121673-4-13

View detailed technical data, stock status, and sourcing information for: 121673-4-13
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-01-052-5813

Item Name Code

27851

Assigment Date

12/16/1977 (48 years ago)

1.231 inches minimum and 1.251 inches maximum fastener length, right-hand thread direction, 3a thread class, dished hexagon head style, 0.283 inches minimum and 0.333 inches maximum thread 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: 0.283 inches minimum and 0.333 inches maximum
Fastener Length: 1.231 inches minimum and 1.251 inches maximum
Head Style: dished hexagon
Head Height: 0.126 inches minimum and 0.141 inches maximum
Width Between Flats: 0.430 inches minimum and 0.439 inches maximum
Grip Diameter: 0.2483 inches minimum and 0.2492 inches maximum
Shank Unthreaded Hole Diameter: 0.076 inches minimum and 0.086 inches maximum first hole
Nominal Thread Diameter: 0.250 inches
Grip Length: 0.812 inches minimum and 0.828 inches maximum
Thread Quantity Per Inch: 28
Hardness Rating: 36.0 rockwell c minimum and 43.0 rockwell c maximum overall
Distance From Head Largest Bearing Surface To Shank Hole Center: 1.131 inches minimum and 1.161 inches maximum first hole
Surface Finish: 63.0 microinches bearing surface of head
Surface Finish: 63.0 microinches grip
Special Features: retaining element in shank
Material: steel comp e4340 or steel comp 4340 or steel comp 4140 or steel comp 8740 or steel comp 4130 or steel comp 6150 overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416,type 2,class 2 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
121673-4-13	Close Tolerance Bolt
ST3M735-4-13	Close Tolerance Bolt

FAQs

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

What is the FSCG of the NSN 5306-01-052-5813?

The FSCG of the NSN 5306-01-052-5813 is 5306

Does the NSN 5306-01-052-5813 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-01-052-5813 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 5306-01-052-5813 contain precious materials?

Precious metal content is unknown

Does NSN 5306-01-052-5813 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 5306-01-052-5813 was assigned to the Federal Catalog?

It was assigned 48 years ago, on Fri, Dec 16, 1977