Model: A51B24668-21

Internally Relieved Body Bolt

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

0.297 inches

Fastener Length

Between 3.928 inches and 3.933 inches

Head Style

Dee chamfer

Head Diameter

1.710 inches

Head Height

0.145 inches

Distance From Centerline To Flat

0.569 inches

Shoulder Diameter

Between 1.1468 inches and 1.1473 inches

Shoulder Length

Between 3.318 inches and 3.323 inches

Concentric Hole Depth

Between 2.878 inches and 2.883 inches

Concentric Hole Diameter

Between 0.499 inches and 0.506 inches

Thread Diameter

0.375 inches

Thready Qty Per Inch (tpi)

Hardness Rating

46.0 rockwell c and 49.0 rockwell c

Part Name Assigned By Controlling Agency

Navy special project

Material

Steel

Material Specification

G-1010, cage 26512 mfr ref single material response

Surface Treatment

Cadmium

Surface Treatment Specification

Gss9056, cage 26512 mfr ref single treatment response

Style Designator

Concentric hole unthreaded

Thread Series Designator

Unjf

NSN

5306-01-386-8147

Part Number

A51B24668-21

Description

Bolt,internally Relieved Body

CAGE

06892

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 A51B24668-21 NSN 5306-01-386-8147

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

06676

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:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

093486

UFC:

48950

LTL:

RATING VARIABLE

LCL:

WCC:

573

TCC:

SHC:

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