Model: 20-99

Tapping Screw

Properties:

Fastener Length

0.500 inches

Head Style

Hexagon extended washer

Head Height

Between 0.165 inches and 0.170 inches

Width Between Flats

Between 0.305 inches and 0.312 inches

Extended Washer Diameter

Between 0.384 inches and 0.414 inches

Extended Washer Thickness

Between 0.050 inches and 0.060 inches

Internal Drive Style

Slot

Nonmachine Thread Style

Dog type (type b or c)

Nonmachine Thread Diameter

0.190 inches

Material

Steel

Surface Treatment

Cadmium

NSN

5305-00-026-2597

Part Number

20-99

Description

Screw,tapping

CAGE

31211

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 20-99 NSN 5305-00-026-2597

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:

0.6000lbs

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