Model: 8640-4

Turnlock Fastener Stud Assembly

Properties:

Turnlock Stud Head Style

Flat countersunk

Stud Assembly Style

Stud assembly

Distance From Engaging Member To Largest Bearing Surface Of Head

0.812 inches

Eyelet Outside Diameter

Between 0.373 inches and 0.375 inches

Stud Diameter

0.250 inches

Eyelet Length

0.187 inches

Drive Type

Cross recess

Stud Thread Size And Series/type Designator

0.250-28 unf

Material

Steel

Surface Treatment

Cadmium

NSN

5325-00-820-0308

Part Number

8640-4

Description

Stud Assembly,turnlock Fastener

CAGE

07382

A stud, turnlock fastener over which may be assembled an eyelet, turnlock fastener. Stud(s) without cam slots or cam lead threads are provided with a crosspin or eared nut for locking with the mating receptacle, turnlock fastener. May be spring loaded. For like items having a threaded fastener, see screw assembly, panel or screw, panel fastener.

Part 8640-4 NSN 5325-00-820-0308

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

18484

FIIG:

A05400

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:

066440

UFC:

36960

LTL:

RATING VARIABLE

LCL:

WCC:

713

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 9607190000
SITC: 89985
End Use: Finished textile supplies
NAICS: 339993
USDA: 1

Freight Class: Slide fasteners, nesoi