Model: 78238-428

Double Hexagon Self-locking Nut

Special Features:

Nut is castellated with six slots equally spaced 0.090 in. W, 0.091 deep

Properties:

Thread Class
3b
Thread Direction
Right-hand
Locking Feature
Prevailing torque all metal design
Lubrication
Dry film lubricant
Nut Height
0.238 inches
Width Across Flats
0.120 inches
Thread Series
Unjf
Thready Qty Per Inch (tpi)
28
Hardness Rating
Between 40.0 rockwell c and 44.0 rockwell c
Thread Size
0.250 inches
Bearing Surface Type
Chamfered
Material
Steel comp h11
Material Specification
Ams 6487 assn standard single material response
Surface Treatment
Cadmium
Surface Treatment Specification
Mil-c-8337, type ii, cl 2 military specification single treatment response
NSN
5310-01-056-8763
Part Number
78238-428
Description
Nut,self-locking,double Hexagon
CAGE
56878

A nut having 12 drive points and 24 sides. The bearing surface may be washer faced. An integral locking feature is incorporated in the design of the head or in the threads.

Part 78238-428 NSN 5310-01-056-8763

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
05276
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:
U
ESD:
ESD:
MMAC:
BF
CRITL:
X

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

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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