Model: 3551-A-440-SS-20

Spacing Threaded Standoff

Properties:

Thread Class

2b left internal (includes through thread)

Thread Direction

Right-hand left internal (includes through thread)

Thread Length

0.4500 inches and 0.5050 inches left internal (includes through thread)

Length

Between 0.4550 inches and 0.5050 inches

Cross-sectional Shape

Hexagon

Width Across Flats

0.2500 inches

Thready Qty Per Inch (tpi)

40 left internal (includes through thread)

Thread Size

0.1120 inches left internal (includes through thread)

Right Projection Diameter

Between 0.1850 inches and 0.1880 inches

Right Projection Length

Between 0.0720 inches and 0.0780 inches

Material

Steel comp 303 standoff

Material Specification

Astm-a-582 assn standard single material response standoff

Surface Treatment

Passivate standoff

Surface Treatment Specification

Mil-f-14072 military specification single treatment response standoff

Style Designator

Projection one end

Thread Series Designator

Unc left internal (includes through thread)

NSN

5340-01-459-0156

Part Number

3551-A-440-SS-20

Description

Standoff,threaded,spacing

CAGE

55566

Part 3551-A-440-SS-20 NSN 5340-01-459-0156

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

40280

FIIG:

A08900

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:

1.2000lbs

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:

095190

UFC:

49790

LTL:

RATING VARIABLE

LCL:

WCC:

713

TCC:

SHC:

ACC:

Construction Materials

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