166253PC9

View detailed technical data, stock status, and sourcing information for: 166253PC9
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-271-5110

Item Name Code

16282

Assigment Date

01/01/1963 (63 years ago)

3a thread class, flat chamfer head style, 1.109 inches minimum and 1.156 inches maximum fastener length, 1.000 inches minimum thread length, 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: 3a
Thread Direction: right-hand
Thread Length: 1.000 inches minimum
Fastener Length: 1.109 inches minimum and 1.156 inches maximum
Head Style: flat chamfer
Head Diameter: 0.365 inches minimum and 0.375 inches maximum
Head Height: 0.244 inches minimum and 0.250 inches maximum
Internal Drive Style: hexagon
Nominal Thread Diameter: 0.250 inches
Width Across Flats: 0.188 inches nominal
Thread Quantity Per Inch: 20
Minimum Tensile Strength: 160000 pounds per square inch
Hardness Rating: 36.0 rockwell c minimum and 45.0 rockwell c maximum overall
Minimum Yield Strength: 130000 pounds per square inch
Material: steel overall
Material Document And Classification: 66 fed std single material response overall
Surface Treatment: zinc overall
Surface Treatment Document And Classification: qq-z-325,ty 2,cl 3 fed spec single treatment response overall
Thread Series Designator: unc
Nondefinitive Spec/Std Data: 1 type
Departure From Cited Designator: as modified by fastener length

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
12Z51PC336	Socket Head Cap Screw
166253PC9	Socket Head Cap Screw
43S4366-55	Socket Head Cap Screw
581131PC7	Socket Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-00-271-5110?

The FSCG of the NSN 5305-00-271-5110 is 5305

Does the NSN 5305-00-271-5110 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-271-5110 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 5305-00-271-5110 contain precious materials?

Precious metal content is unknown

Does NSN 5305-00-271-5110 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 5305-00-271-5110 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963