Model: NAS1831-4C05

Hexagon Plain Nut

Properties:

Thread Class

Thread Direction

Right-hand

Nut Style

Hexagon

Nut Height

Between 0.308 inches and 0.318 inches

Width Across Flats

Between 0.309 inches and 0.317 inches

Thread Series

Unc

Thready Qty Per Inch (tpi)

Thread Size

0.138 inches

Bearing Surface Type

Chamfered

Part Name Assigned By Controlling Agency

Navy special project

Material

Steel comp 4130 or steel comp 8630 or steel comp 8740

Material Specification

Mil-s-6758, cond f military specification 1st material response or mil-s-6050, cond f military specification 2nd material response or mil-s-6049, cond f military specification 3rd material response

Surface Treatment

Cadmium and chromate

Surface Treatment Specification

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

Specification Data

80205-nas1831 professional/industrial association standard

NSN

5310-01-283-3507

Part Number

NAS1831-4C05

Description

Nut,plain,hexagon

CAGE

80205

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 NAS1831-4C05 NSN 5310-01-283-3507

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:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

093470

UFC:

48940

LTL:

70.0

LCL:

WCC:

713

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