Model: ST3M839-4D12

Shoulder Bolt

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.443 inches and 0.493 inches

Fastener Length

Between 1.203 inches and 1.233 inches

Head Style

Spline extended washer

Head Height

Between 0.240 inches and 0.260 inches

Width Between Flats

Between 0.318 inches and 0.324 inches

Extended Washer Diameter

Between 0.460 inches and 0.470 inches

Extended Washer Thickness

Between 0.035 inches and 0.055 inches

Shoulder Diameter

0.2647 inches first shoulder and 0.2651 inches first shoulder

Shoulder Length

0.740 inches first shoulder and 0.760 inches first shoulder

Shank Unthreaded Hole Diameter

0.076 inches first hole and 0.081 inches first hole

Thread Diameter

0.250 inches

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

220000 pounds per square inch

Distance From Head Largest Bearing Surface To Shank Hole Center

1.011 inches first hole and 1.051 inches first hole

Shoulder Shape

Round first shoulder

Material

Steel comp xm-13

Material Specification

Ams5629 assn standard single material response

Surface Treatment

Passivate

Surface Treatment Specification

Qq-p-35 federal specification single treatment response

Thread Series Designator

Unjf

NSN

5306-01-142-9384

Part Number

ST3M839-4D12

Description

Bolt,shoulder

CAGE

76301

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 ST3M839-4D12 NSN 5306-01-142-9384

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:

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