Model: 03A251-8

Hexagon Self-locking Nut

Properties:

Thread Class
3b
Thread Direction
Right-hand
Locking Feature
Prevailing torque with nonmetallic insert
Nut Style
Hexagon
Nut Height
Between 0.303 inches and 0.323 inches
Width Across Flats
Between 0.740 inches and 0.752 inches
Thread Series
Unjf
Thready Qty Per Inch (tpi)
20
Hardness Rating
Between 34.0 rockwell c and 38.0 rockwell c
Thread Size
0.500 inches
Bearing Surface Type
Chamfered
Material
Steel comp 4130 except insert
Material Specification
Mil-s-6758 military specification single material response except insert
Surface Treatment
Cadmium except insert and chromate except insert
Surface Treatment Specification
Qq-p-416ty2cl2 federal specification single treatment response except insert
NSN
5310-01-361-7085
Part Number
03A251-8
Description
Nut,self-locking,hexagon
CAGE
76823

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 03A251-8 NSN 5310-01-361-7085

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:
SX
CRITL:
X

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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