Model: 72531-3F-28B

Socket Head Cap Screw

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

1.750 inches

Fastener Length

1.750 inches

Head Style

Flat chamfer

Head Diameter

Between 0.307 inches and 0.312 inches

Head Height

Between 0.092 inches and 0.098 inches

Internal Drive Style

Hexagon

Thread Diameter

0.190 inches

Width Across Flats

0.0938 inches

Thready Qty Per Inch (tpi)

Hardness Rating

38.0 rockwell c and 45.0 rockwell c

Color

Black

Material

Steel

Material Specification

Astma574 assn standard single material response

Surface Treatment

Oxide

Surface Treatment Specification

Mil-c-13924, cl 1 military specification single treatment response

Thread Series Designator

Unrf

NSN

5305-01-332-5204

Part Number

72531-3F-28B

Description

Screw,cap,socket Head

CAGE

56878

An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See bolt, internal wrenching. Excludes screw, shoulder; and screw, machine.

Part 72531-3F-28B NSN 5305-01-332-5204

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

16282

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:

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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