Model: B18.5

Square Neck Bolt

Description:

2a thread class, right-hand , 0.750 inches thread length, 3.500 inches fastener length, round head style, 0.563 inches head diameter.

Properties:

Thread Class

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)

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:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

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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