256-640

View detailed technical data, stock status, and sourcing information for: 256-640
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Federal Supply Group

Hand Tools

Federal Supply Classification

5133 Countersinks: Hand and Machine, Counterbores and Drill Bits

National Stock Number

5133-01-095-7988

Item Name Code

05237

Assigment Date

06/06/1980 (46 years ago)

An end cutting tool having two or more cutting edges, and having helical flutes or grooves adjacent thereto for the admission of coolant and the ejection of cuttings or chips. It is used for drilling holes in various materials. Excludes:drill, masonry (as modified); and drill,twist, bone. See also drill, pivot, jeweler's and drill, hardened steel, carbide tipped.

general purpose cutting end style, 3.500 inches nominal overall length, 0.1875 inches nominal cutting diameter, 0.188 inches nominal shank diameter, straight round shank style

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Shank Diameter: 0.188 inches nominal
Shank Style: straight round
Overall Length: 3.500 inches nominal
Cutting End Style: general purpose
Nominal Cutting Diameter: 0.1875 inches
Cutting Rotation Direction: right-hand
Flute Length: 2.312 inches nominal
Flute Quantity: 2
Point Type: split
Point Angle: 118.0 degrees nominal
Special Features: jobbers lg; fractional size 3/16
Material: steel overall
Surface Treatment: oxide film overall
Specification/Standard Data: 80205-nas907 professional/industrial association standard
Nondefinitive Spec/Std Data: a type
Departure From Cited Document: as modified by surface treatment

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
06573	Twist Drill
2111 3/16	Twist Drill
256-640	Twist Drill
JL.187	Twist Drill
NAS907 TYASZ3/16	Twist Drill

FAQs

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

What is the FSCG of the NSN 5133-01-095-7988?

The FSCG of the NSN 5133-01-095-7988 is 5133

Does the NSN 5133-01-095-7988 have a Schedule B code assigned?

Yes, the Schedule B code is 8205100000

Does NSN 5133-01-095-7988 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 5133-01-095-7988 contain precious materials?

Item does not contain precious metal.

Does NSN 5133-01-095-7988 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 5133-01-095-7988 was assigned to the Federal Catalog?

It was assigned 46 years ago, on Fri, Jun 6, 1980