Model: 579B1

Tapping Screw

Properties:

Fastener Length

0.250 inches

Head Style

Flat countersunk

Head Diameter

Between 0.308 inches and 0.332 inches

Internal Drive Style

Slot

Nonmachine Thread Style

Dog type (type b or c)

Countersink Angle

Between 80.0 degrees and 82.0 degrees

Nonmachine Thread Diameter

0.164 inches

Material

Steel comp 1016 or steel comp 1018 or steel comp 1019 or steel comp 1021 or steel comp 1022 or steel comp 1524

Surface Treatment

Cadmium and chromate

Surface Treatment Specification

Qq-p-416, type 2, class 3 federal specification all treatment responses

Nondefinitive Specification/std Data

B type

NSN

5305-00-737-3275

Part Number

579B1

Description

Screw,tapping

CAGE

56442

A hardened externally threaded fastener whose thread extends to the bearing surface of the head. The thread may be fluted or otherwise designed to cut or form its own mating thread. Excludes screw, assembled washer.

Part 579B1 NSN 5305-00-737-3275

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

41756

FIIG:

A003B0

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

Packaging & Shipping

Est. Pack Size

Est. Pack Weight

Est. Item Weight

Est. Item Dim.

Pack Size:

Paclk Weight:

0.1000lbs

Item Weight:

Item Dim:

OPI

SPI No.

SPI Rev.

SPC Mkg.

LVL A

LVL B

OPI:

SPI No.:

SPI Rev.:

SPC Mkg:

LVL_A:

LVL_B:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

093486

UFC:

48950

LTL:

RATING VARIABLE

LCL:

WCC:

713

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 7318140000
SITC: 69421
End Use: Iron and steel products, other
NAICS: 332722
USDA: 1

Freight Class: Self-tapping screws of iron or steel