Model: 6640211 FIND 21

Hexagon Plain Nut

Properties:

Thread Class

Thread Direction

Right-hand

Nut Style

Hexagon

Nut Height

Between 0.210 inches and 0.227 inches

Width Across Flats

Between 0.551 inches and 0.563 inches

Thread Series

Unf

Thready Qty Per Inch (tpi)

Hardness Rating

Between 78.0 rockwell b and 38.0 rockwell c

Thread Size

0.375 inches

Bearing Surface Type

Chamfered or washer faced

Material

Steel

Surface Treatment

Cadmium

Surface Treatment Specification

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

Nondefinitive Specification/std Data

2 type and 5 style and c grade

NSN

5310-00-891-1751

Part Number

6640211 FIND 21

Description

Nut,plain,hexagon

CAGE

53711

A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)

Part 6640211 FIND 21 NSN 5310-00-891-1751

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

01857

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