Model: C389-7

Assembled Washe Self-locking Nut

Properties:

Thread Class

Thread Direction

Right-hand

Locking Feature

Prevailing torque all metal design

Washer Outside Diameter

0.760 inches

Counterbore Diameter

0.474 inches nut and 0.484 inches nut

Overall Height

Between 0.383 inches and 0.403 inches

Nut Style

Flat with turned up edge

Nut Counterbore Depth

0.072 inches nut and 0.087 inches nut

Width Across Flats

Between 0.492 inches and 0.512 inches

Thread Series

Unjf

Thready Qty Per Inch (tpi)

Hardness Rating

Between 36.0 rockwell c and 40.0 rockwell c

Thread Size

0.438 inches

Material

Steel comp 1050 washer

Material

Steel comp e4340 nut or steel comp 4340 nut or steel comp 8740 nut

Material Specification

Astm a108 assn standard single material response washer

Material Specification

Mil-s-5000 military specification 1st material response nut or mil-s-5000 military specification 2nd material response nut or mil-s-6049 military specification 3rd material response nut

Surface Treatment

Cadmium

Surface Treatment Specification

Qq-p-416, type 2, cl 3 federal specification single treatment response

NSN

5310-01-037-4219

Part Number

C389-7

Description

Nut,self-locking,assembled Washe

CAGE

81755

A nut on which has been assembled a nonremovable washer. An integral feature is incorporated for locking on the threads of a mating member.

Part C389-7 NSN 5310-01-037-4219

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

29736

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: 7318160000
SITC: 69421
End Use: Finished metal shapes
NAICS: 332722
USDA: 1

Freight Class: Nuts of iron or steel