Model: 553-8257-002

Round Plain Nut

Properties:

Thread Class
2b
Thread Direction
Right-hand
Nut Style
Round
Nut Diameter
0.562 inches
Nut Thickness
Between 0.095 inches and 0.105 inches
Drive Point Quantity
2
Drive Point Diameter
0.078 inches
Thread Series
Unc
Thready Qty Per Inch (tpi)
18
Thread Size
0.312 inches
Part Name Assigned By Controlling Agency
Navy special project
Material
Steel comp 303
Material Specification
Qq-s-763 federal specification single material response
Surface Treatment
Passivate
NSN
5310-00-057-0557
Part Number
553-8257-002
Description
Nut,plain,round
CAGE
13499

A nut, circular in shape, which may have wrenching facilities such as flats, holes, protrusions, slots or splines in or on the periphery or in the face opposite the bearing surface. For items having a thickness (or height) exceeding two times the outside diameter, use post, electrical-mechanical equipment. See also nut (1), plain, knurled. (when height or thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)

Part 553-8257-002 NSN 5310-00-057-0557

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
15887
FIIG:
A021A0
Concept No.:
1
App. Key:
AY
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:
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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