BACB30NN4K20

View detailed technical data, stock status, and sourcing information for: BACB30NN4K20
DODParts.com distributes related products varnishes dopes paints, aircraft parts and consumables, electrical parts, fittings and other components for the aerospace and defense industries. Submit the short price quote form for part BACB30NN4K20 to receive an up to date pricing and availability quote by email.

Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-521-4847

Item Name Code

29294

Assigment Date

06/23/2004 (22 years ago)

A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (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. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.

3a thread class, flat countersunk head style, right-hand thread direction, 1.513 inches nominal fastener length, 0.425 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: 3a
Thread Direction: right-hand
Thread Length: 0.425 inches nominal
Fastener Length: 1.513 inches nominal
Head Style: flat countersunk
Head Diameter: 0.465 inches minimum and 0.510 inches maximum
Grip Diameter: 0.250 inches maximum
Internal Drive Style: cross recess type 1
End Item Identification: aircraft, b757
Nominal Thread Diameter: 0.250 inches
Grip Length: 1.250 inches nominal
Thread Quantity Per Inch: 28
Countersink Angle: 99.0 degrees minimum and 101.0 degrees maximum
Special Features: thread end to be identified w/black dye or paint
Material: titanium alloy overall
Surface Treatment: aluminum 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
BACB30NN4K20	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-521-4847?

The FSCG of the NSN 5305-01-521-4847 is 5305

Does the NSN 5305-01-521-4847 have a Schedule B code assigned?

Yes, the Schedule B code is 8109900000

Does NSN 5305-01-521-4847 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 5305-01-521-4847 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-521-4847 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 5305-01-521-4847 was assigned to the Federal Catalog?

It was assigned 22 years ago, on Wed, Jun 23, 2004