MS51934-21

View detailed technical data, stock status, and sourcing information for: MS51934-21
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-01-043-1856

Item Name Code

01850

Assigment Date

06/21/1977 (49 years ago)

An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes:bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. See also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.

0.594 inches minimum and 0.625 inches maximum fastener length, 0.494 inches minimum and 0.625 inches maximum thread length, 2a thread class, pan no. 2 head style, right-hand thread direction

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: 0.494 inches minimum and 0.625 inches maximum
Fastener Length: 0.594 inches minimum and 0.625 inches maximum
Head Style: pan no. 2
Head Diameter: 0.547 inches minimum and 0.578 inches maximum
Head Height: 0.062 inches minimum and 0.094 inches maximum
Welding Projection Quantity: 4 bearing surface of head
Internal Drive Style: w/o internal drive
Nominal Thread Diameter: 0.250 inches
Thread Quantity Per Inch: 20
Material: steel 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
MS51934-21	Welding Bolt

FAQs

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

What is the FSCG of the NSN 5306-01-043-1856?

The FSCG of the NSN 5306-01-043-1856 is 5306

Does the NSN 5306-01-043-1856 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-01-043-1856 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 5306-01-043-1856 contain precious materials?

Precious metal content is unknown

Does NSN 5306-01-043-1856 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 5306-01-043-1856 was assigned to the Federal Catalog?

It was assigned 49 years ago, on Tue, Jun 21, 1977