Model: 21353

Square Neck Bolt

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
Between 0.532 inches and 0.551 inches
Fastener Length
Between 0.720 inches and 0.770 inches
Head Style
Round
Head Diameter
Between 0.782 inches and 0.844 inches
Head Height
Between 0.188 inches and 0.208 inches
End Application
F-15sa
Neck Length
Between 0.188 inches and 0.219 inches
Thread Diameter
0.375 inches
Thready Qty Per Inch (tpi)
16
Neck Width
Between 0.368 inches and 0.388 inches
Part Name Assigned By Controlling Agency
Round head, carriage bolt
Material
Steel
Surface Treatment
Zinc
Thread Series Designator
Unc
NSN
5306-01-646-5549
Part Number
21353
Description
Bolt,square Neck
CAGE
36RC4

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

Part 21353 NSN 5306-01-646-5549

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:
A
ESD:
A
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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