5306-01-281-7801

Find complete technical information, availability, and procurement data for: 5306-01-281-7801
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-01-281-7801

Item Name Code

04905

Assigment Date

07/01/1988 (38 years ago)

right-hand thread direction, 4.250 inches nominal fastener length, square head style, 2a thread class, 1.375 inches nominal 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: 2a
Thread Direction: right-hand
Thread Length: 1.375 inches nominal
Fastener Length: 4.250 inches nominal
Head Style: square
Head Height: 2.250 inches nominal
Width Between Flats: 0.907 inches minimum and 0.938 inches maximum
Shoulder Diameter: 0.500 inches minimum and 0.562 inches maximum first shoulder
Shoulder Length: 1.250 inches nominal first shoulder
Shank Unthreaded Hole Diameter: 0.219 inches minimum and 0.235 inches maximum first hole
Nominal Thread Diameter: 0.500 inches
Thread Quantity Per Inch: 13
Hardness Rating: 33.0 rockwell c minimum and 38.0 rockwell c maximum grip
Hardness Rating: 33.0 rockwell c minimum and 38.0 rockwell c maximum threads
Hardness Rating: 43.0 rockwell c minimum and 48.0 rockwell c maximum head
Distance From Head Largest Bearing Surface To Shank Hole Center: 4.000 inches nominal first hole
Shoulder Shape: round first shoulder
Special Features: head slanted 45 degrees; rockwell c hardened 1.250 in. min. to 1.750 in. max on head
Material: steel comp 4140h or steel comp 4142h overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416,type 2,class 3 fed spec single treatment response overall
Thread Series Designator: unc

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
10518858	Shoulder Bolt

FAQs

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

What is the FSCG of the NSN 5306-01-281-7801?

The FSCG of the NSN 5306-01-281-7801 is 5306

Does the NSN 5306-01-281-7801 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-01-281-7801 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 5306-01-281-7801 contain precious materials?

Item does not contain precious metal.

Does NSN 5306-01-281-7801 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 5306-01-281-7801 was assigned to the Federal Catalog?

It was assigned 38 years ago, on Fri, Jul 1, 1988