Model: A51B21651-11

Shoulder Bolt

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

0.338 inches

Fastener Length

1.188 inches

Head Style

Hexagon

Head Height

Between 0.188 inches and 0.203 inches

Width Between Flats

Between 0.553 inches and 0.564 inches

Shoulder Diameter

0.3725 inches first shoulder and 0.3731 inches first shoulder

Shoulder Length

0.750 inches first shoulder

Thread Diameter

0.250 inches

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

180000 pounds per square inch

Hardness Rating

39.0 rockwell c and 42.0 rockwell c

Shoulder Shape

Round first shoulder

Material

Steel comp 4340

Material Specification

Mil-s-5000 military specification single material response

Surface Treatment

Cadmium

Surface Treatment Specification

Mil-c-8837, type 1, class 1 military specification single treatment response

Thread Series Designator

Unjf

NSN

5306-00-922-1473

Part Number

A51B21651-11

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 A51B21651-11 NSN 5306-00-922-1473

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:

Packaging & Shipping

Est. Pack Size

Est. Pack Weight

Est. Item Weight

Est. Item Dim.

Pack Size:

Paclk Weight:

0.1000lbs

Item Weight:

Item Dim:

OPI

SPI No.

SPI Rev.

SPC Mkg.

LVL A

LVL B

OPI:

SPI No.:

SPI Rev.:

SPC Mkg:

LVL_A:

LVL_B:

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