Model: B18.5

Square Neck Bolt

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
0.750 inches
Fastener Length
3.500 inches
Head Style
Round
Head Diameter
Between 0.563 inches and 0.594 inches
Head Height
Between 0.125 inches and 0.145 inches
Neck Length
Between 0.125 inches and 0.156 inches
Thread Diameter
0.250 inches
Thready Qty Per Inch (tpi)
20
Hardness Rating
95.0 rockwell b
Minimum Yield Strength
55000 pounds per square inch
Neck Width
Between 0.245 inches and 0.260 inches
Material
Steel
Surface Treatment
Zinc
Surface Treatment Specification
Astm b633 assn standard single treatment response
Thread Series Designator
Unc
NSN
5306-00-044-5623
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 5306-00-044-5623

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

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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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