Model: 558

Internally Relieved Body Bolt

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
1.187 inches
Fastener Length
4.500 inches
Head Style
Hexagon
Head Height
0.500 inches
Width Between Flats
0.750 inches
Concentric Hole Depth
1.625 inches
Counterbore Diameter
0.312 inches
Concentric Hole Diameter
0.213 inches
Thread Diameter
0.500 inches
Internal Thread Class
2b concentric hole
Material
Steel
Style Designator
Concentric hole unthreaded
Thread Series Designator
Unc
NSN
5306-00-741-1931
Part Number
558
Description
Bolt,internally Relieved Body
CAGE
93070

An externally threaded fastener whose external threaded portion is of one nominal diameter. It has a concentric hole along the longitudinal centerline which may extend a part or the full length of the bolt. The concentric hole along the centerline may be counterbored and/or internally threaded at the head end or the bolt end. The head is designed to be held or driven by an external and/or internal driver. For items having a hole(s) perpendicular to the axis which meet the concentric hole along the longitudinal centerline, see bolt, fluid passage.

Part 558 NSN 5306-00-741-1931

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
06676
FIIG:
A003B0
Concept No.:
App. Key:
BN
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

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Schedule B and Export
  • Schedule B: 7318152000
  • SITC: 69421
  • End Use: Iron and steel products, other
  • NAICS: 332722
  • USDA: 1

Freight Class: Bolts and bolts and their nuts or washers exported in the same shipment

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