Model: 91251A190

Socket Head Cap Screw

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

0.188 inches

Fastener Length

0.250 inches

Head Style

Flat chamfer

Head Diameter

Between 0.262 inches and 0.270 inches

Head Height

Between 0.159 inches and 0.164 inches

Internal Drive Style

Hexagon

Thread Diameter

0.164 inches

Width Across Flats

0.141 inches

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

180000 pounds per square inch

Hardness Rating

39.0 rockwell c and 45.0 rockwell c

Material

Steel uns k03104

Material Specification

Astm a574 assn standard single material response

Thread Series Designator

Unc

NSN

5305-01-439-8417

Part Number

91251A190

Description

Screw,cap,socket Head

CAGE

39428

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 91251A190 NSN 5305-01-439-8417

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