HT239PB4-9

View detailed technical data, stock status, and sourcing information for: HT239PB4-9
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-027-5251

Item Name Code

29294

Assigment Date

09/18/1976 (49 years ago)

0.290 inches minimum and 0.357 inches maximum thread length, 0.862 inches minimum and 0.909 inches maximum fastener length, right-hand thread direction, 3a thread class, flat countersunk 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: 3a
Thread Direction: right-hand
Thread Length: 0.290 inches minimum and 0.357 inches maximum
Fastener Length: 0.862 inches minimum and 0.909 inches maximum
Head Style: flat countersunk
Head Diameter: 0.390 inches minimum and 0.395 inches maximum
Grip Diameter: 0.2485 inches minimum and 0.2495 inches maximum
Internal Drive Style: high-torque
Nominal Thread Diameter: 0.250 inches
Grip Length: 0.552 inches minimum and 0.572 inches maximum
Thread Quantity Per Inch: 28
Minimum Tensile Strength: 160000 pounds per square inch
Countersink Angle: 100.0 degrees nominal
Surface Finish: 63.0 microinches grip
Surface Finish: 63.0 microinches threads
Material: steel comp 4140 or steel comp e4340 or steel comp 6150 or steel comp 8735 or steel comp 8740 overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416,ty 2,cl 2 fed spec single treatment response overall
Thread Series Designator: unf
Specification/Standard Data: 26512-gb510l manufacturers standard

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
106750-4-9	Close Tolerance Screw
GB510L4-9	Close Tolerance Screw
HT239PB-4-9	Close Tolerance Screw
HT239PB4-9	Close Tolerance Screw
HT8043-4-9	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-027-5251?

The FSCG of the NSN 5305-01-027-5251 is 5305

Does the NSN 5305-01-027-5251 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-027-5251 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 5305-01-027-5251 contain precious materials?

Precious metal content is unknown

Does NSN 5305-01-027-5251 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 5305-01-027-5251 was assigned to the Federal Catalog?

It was assigned 49 years ago, on Sat, Sep 18, 1976