Model: ST3M550A4-21

Pin-rivet

Properties:

Thread Class

Thread Direction

Right-hand

Fastener Length

Between 1.697 inches and 1.717 inches

Head Style

Flush countersunk

Width Between Flats

Between 0.094 inches and 0.096 inches

Shank Diameter

Between 0.2797 inches and 0.2807 inches

Shank Style

Pin-rivet, straight, threaded

Head Major Diameter

Between 0.421 inches and 0.426 inches

Lubrication

Cetyl alcohol

Grip Length

1.317 inches

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

160000 pounds per square inch

Thread Size

0.250 inches

Shear Strength

95000 single pounds per square inch

Countersink Angle

100.0 degrees

Material

Steel comp e4340 or steel comp 4340 or steel comp 4140 or steel comp 8740

Material Specification

Mil-s-5000 military specification 1st material response or mil-s-5000 military specification 2nd material response or mil-s-5626 military specification 3rd material response or mil-s-6049 military specification 4th material response

Surface Treatment

Cadmium

Surface Treatment Specification

Qq-p-416, type 2, cl 3 federal specification single treatment response

Thread Series Designator

Unjf

NSN

5320-00-279-4722

Part Number

ST3M550A4-21

Description

Pin-rivet

CAGE

76301

A metallic or nonmetallic item, headed at one end, with a cylindrically shaped shank which may be tapered, grooved, or threaded. a locking collar or sleeve may be provided to perform the same holding action as the clinching portion of a conventional rivet. the shank may include an external wrenching facility which breaks off at a predetermined applied torque.

Part ST3M550A4-21 NSN 5320-00-279-4722

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

67165

FIIG:

A528U0

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:

095190

UFC:

49790

LTL:

70.0

LCL:

WCC:

713

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 7318230000
SITC: 69422
End Use: Finished metal shapes
NAICS: 332722
USDA: 1

Freight Class: Rivets of iron or steel