Model: NAS1757-20

Hexagon Self-locking Nut

Properties:

Thread Class
3b
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)
12
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.:
1
App. Key:
BK
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
CRITL:
X

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:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
--
WCC:
573
TCC:
Z
SHC:
9
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

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