EWSB2208-A91

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-00-031-0921

Item Name Code

15903

Assigment Date

10/28/1972 (53 years ago)

A high strength, 160,000 pounds per square inch (1100 megapascals) minimum tensile strength externally threaded fastener designed for use in applications involving great shear stress. The head is designed to accommodate an external wrench or driver. The head is not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. The unthreaded portion is of specific grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (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. A locking feature may be incorporated in the design of the head or threads. See bolt, machine and bolt, clevis.

double hexagon head style, 6.704 inches minimum and 6.720 inches maximum fastener length, 3a thread class, right-hand thread direction, 1.006 inches minimum and 1.042 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: 1.006 inches minimum and 1.042 inches maximum
Fastener Length: 6.704 inches minimum and 6.720 inches maximum
Head Style: double hexagon
Head Height: 0.281 inches nominal
Width Between Flats: 0.741 inches minimum and 0.752 inches maximum
Grip Diameter: 0.4982 inches minimum and 0.4991 inches maximum
Nominal Thread Diameter: 0.500 inches
Grip Length: 5.678 inches minimum and 5.698 inches maximum
Thread Quantity Per Inch: 20
Minimum Tensile Strength: 220000 pounds per square inch
Part Name Assigned By Controlling Agency: navy special project
Material: steel comp h11 overall
Surface Treatment: cadmium overall
Surface Treatment Document And Classification: nas 672 assn std 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
AIC516B8-91	Shear Bolt
BM17020-8-91	Shear Bolt
EWSB22-8A91	Shear Bolt
EWSB2208-A91	Shear Bolt
GB511B8-91	Shear Bolt
VAL22034-8F91	Shear Bolt
VS2521-8F91	Shear Bolt

FAQs

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

What is the FSCG of the NSN 5306-00-031-0921?

The FSCG of the NSN 5306-00-031-0921 is 5306

Does the NSN 5306-00-031-0921 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-00-031-0921 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 5306-00-031-0921 contain precious materials?

Item does not contain precious metal.

Does NSN 5306-00-031-0921 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 5306-00-031-0921 was assigned to the Federal Catalog?

It was assigned 53 years ago, on Sat, Oct 28, 1972