Model: A51B27581-13

Shoulder Bolt

Special Features:

Min thickness of silver plate to be 0.0002 on threaded area

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

0.640 inches

Fastener Length

3.096 inches

Head Style

Round w/wrench flats

Head Diameter

1.750 inches

Head Height

0.250 inches

Width Between Flats

1.500 inches

Shoulder Diameter

1.2465 inches first shoulder and 1.2470 inches first shoulder

Shoulder Length

2.456 inches first shoulder

Shank Unthreaded Hole Diameter

0.141 inches first hole

Thread Diameter

0.875 inches

Thready Qty Per Inch (tpi)

Hardness Rating

46.0 rockwell c and 49.0 rockwell c

Distance From Head Largest Bearing Surface To Shank Hole Center

2.956 inches first hole

Shoulder Shape

Round first shoulder

Part Name Assigned By Controlling Agency

Navy special project

Material

Steel

Material Specification

Mil-s-8949 military specification single material response

Precious Material

Silver

Surface Treatment

Silver

Surface Treatment Specification

Ams 2410 assn standard single treatment response

Test Data Document

81349-mil-i-6868 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).

Thread Series Designator

Unjf

NSN

5306-00-972-3963

Part Number

A51B27581-13

Description

Bolt,shoulder

CAGE

61174

An externally threaded fastener whose threaded portion is of one nominal diameter, no. 10 (0.190 in.) (5 mm) or larger. It has a round unthreaded neck or shank all or part of which is of greater diameter than the threaded portion. The head is not designed to be held or driven with an inserted drivers. A locking feature may be incorporated in the design of the head or threads. For items with a thread diameter smaller than no. 10 (0.190 in.) (5 mm) and those items with an inserted drive head, use screw, shoulder. For items which are no. 10 (0.190 in.) (5 mm) or larger in size and are both shouldered and have an externally relieved body, use bolt, externally relieved body. Excludes thumbscrew.

Part A51B27581-13 NSN 5306-00-972-3963

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

04905

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