Model: NAS1757-20

Hexagon Self-locking Nut

Properties:

Thread Class

Thread Direction

Right-hand

Locking Feature

Prevailing torque all metal design

Nut Style

Hexagon

Nut Height

0.766 inches

Width Across Flats

Between 1.801 inches and 1.815 inches

Tempurature Rating

450.0 degrees fahrenheit

Thread Series

Unjf

Thready Qty Per Inch (tpi)

Hardness Rating

41.0 rockwell c

Thread Size

1.250 inches

Countersink Angle

120.0 degrees both ends

Bearing Surface Type

Chamfered

Material

Steel comp 8740 or steel comp 4340 or steel comp 4140 or steel comp 4130

Material Specification

Mil-s-6049 military specification 1st material response or ams 6322 assn standard 1st material response or mil-s-5000 military specification 2nd material response or ams 6378 assn standard 3rd material response

Surface Treatment

Cadmium and chromate

Surface Treatment Specification

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

Specification Data

80205-nas1757 professional/industrial association standard

NSN

5310-01-203-3216

Part Number

NAS1757-20

Description

Nut,self-locking,hexagon

CAGE

80205

A nut having a flat bottom and 6 sides. An integral feature is incorporated for locking on the threads of a mating member. Excludes nut (1), self-locking, cap.

Part NAS1757-20 NSN 5310-01-203-3216

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

05277

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:

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