Model: 642AS7549-2

Socket Head Cap Screw

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.136 inches and 0.229 inches

Fastener Length

Between 0.281 inches and 0.312 inches

Head Style

Flat countersunk

Head Diameter

Between 0.244 inches and 0.279 inches

Locking Feature

Strip threads

Internal Drive Style

Slot

Thread Diameter

0.138 inches

Thready Qty Per Inch (tpi)

Hardness Rating

36.0 rockwell c and 43.0 rockwell c

Countersink Angle

82.0 degrees

Material

Plastic locking feature

Material

Steel comp 4130 fastener

Material Specification

Mil-s-6758 military specification single material response fastener

Surface Treatment

Cadmium fastener

Surface Treatment Specification

Qq-p-416, type 2 cl 1 federal specification single treatment response fastener

Thread Series Designator

Unc

NSN

5305-01-081-0739

Part Number

642AS7549-2

Description

Screw,cap,socket Head

CAGE

30003

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 642AS7549-2 NSN 5305-01-081-0739

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:

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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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