Model: 257-9

Setscrew

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.594 inches and 0.656 inches

Fastener Length

Between 0.719 inches and 0.781 inches

Head Style

Square

Head Height

Between 0.270 inches and 0.295 inches

Width Between Flats

Between 0.344 inches and 0.406 inches

Hole Diameter

0.094 inches

Point Style

Cup

Internal Drive Style

W/o internal drive

Thread Diameter

0.375 inches

Hole Quantity

Hole Type

Drilled

Thready Qty Per Inch (tpi)

Hardness Rating

30.0 rockwell c and 37.0 rockwell c

Hole Configuration Style

Square longitudinal hole

Material Specification

66 federal standard all material responses

Surface Treatment

Cadmium and chromate

Surface Treatment Specification

Qq-p-416 type 2 cl 3 federal specification all treatment responses

Thread Series Designator

Unc

NSN

5305-00-255-0074

Part Number

257-9

Description

Setscrew

CAGE

96606

Part 257-9 NSN 5305-00-255-0074

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

06672

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:

713

TCC:

SHC:

ACC:

Construction Materials

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