5305-01-331-0030

Find complete technical information, availability, and procurement data for: 5305-01-331-0030
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-331-0030

Item Name Code

06657

Assigment Date

12/12/1990 (35 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.

0.250 inches nominal fastener length, 2a thread class, 0.200 inches nominal thread length, right-hand thread direction, pan head style

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: 0.200 inches nominal
Fastener Length: 0.250 inches nominal
Head Style: pan
Head Diameter: 0.244 inches minimum and 0.250 inches maximum
Head Height: 0.060 inches minimum and 0.078 inches maximum
Internal Drive Style: cross recess type 1
Nominal Thread Diameter: 0.112 inches
Thread Quantity Per Inch: 40
Screw Material: steel corrosion resisting
Special Features: crest cup spring washer
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
CRESTCUP4-40X1/4	Machine Screw
H21-0001-004	Machine Screw
H21-001-004	Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-01-331-0030?

The FSCG of the NSN 5305-01-331-0030 is 5305

Does the NSN 5305-01-331-0030 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-331-0030 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 5305-01-331-0030 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-331-0030 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 5305-01-331-0030 was assigned to the Federal Catalog?

It was assigned 35 years ago, on Wed, Dec 12, 1990