Model: WSI-4A20

Plate Self-locking Nut

Properties:

Thread Class

Thread Direction

Right-hand

Locking Feature

Prevailing torque with metallic insert

Mounting Hole Diameter

Between 0.128 inches and 0.135 inches

Nut Style

Plate

Nut Length

Between 0.975 inches and 0.995 inches

Nut Height

Between 1.980 inches and 2.020 inches

Plate Thickness

Between 0.050 inches and 0.070 inches

Plate Width

Between 0.386 inches and 0.406 inches

Nut Mounting Provision

Straight holes

Mounting Hole Arrangement Style

2 holes

Distance From Aperture Center To Mounting Hole Center

0.344 inches

Center To Center Distance Between Mounting Holes Along Length

Between 0.686 inches and 0.690 inches

Thread Series

Unf

Thready Qty Per Inch (tpi)

Thread Size

0.190 inches

Material

Aluminum alloy 6061 except insert

Material

Steel comp 304 locking insert

Material Specification

66 assn standard single material response locking insert

Material Specification

Mil-a-12545, t6 military specification single material response except insert

Surface Treatment

Anodize except insert or chromate except insert

Surface Treatment

Cadmium locking insert and chromate locking insert

Surface Treatment Specification

Mil-a-8625, type 1 military specification 1st treatment response except insert or mil-c-5541 military specification 2nd treatment response except insert

Surface Treatment Specification

Qq-p-416, type 2 federal specification single treatment response locking insert

NSN

5310-01-121-5526

Part Number

WSI-4A20

Description

Nut,self-locking,plate

CAGE

04169

A nut with a flanged base of varied shapes which may be plain or mounted by rivets, bolts, welding or integral prongs. An integral feature is incorporated for locking on the threads of a mating member.

Part WSI-4A20 NSN 5310-01-121-5526

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

05280

FIIG:

A021A0

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:

573

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 7616995095
SITC: 69979
End Use: Finished metal shapes
NAICS: 332999
USDA: 1

Freight Class: Articles of aluminum nesoi