Model: B18.5

Square Neck Bolt

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
0.875 inches
Fastener Length
Between 2.469 inches and 2.531 inches
Head Style
Button
Head Diameter
Between 0.688 inches and 0.719 inches
Head Height
Between 0.156 inches and 0.176 inches
Neck Length
Between 0.156 inches and 0.187 inches
Thread Diameter
0.312 inches
Thready Qty Per Inch (tpi)
18
Min. Tensile Strength (psi)
55000 pounds per square inch
Hardness Rating
95.0 rockwell b
Neck Width
Between 0.307 inches and 0.324 inches
Material
Steel
Material Specification
Sae gr 1 assn standard single material response
Surface Treatment
Zinc
Surface Treatment Specification
Astm b633 assn standard single treatment response
Thread Series Designator
Unc
NSN
5306-00-054-8024
Part Number
B18.5
Description
Bolt,square Neck
CAGE
80204

A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.

Part B18.5 NSN 5306-00-054-8024

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
15939
FIIG:
A003B0
Concept No.:
App. Key:
CA
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

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: 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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