Model: 16990-4C-8B

Socket Head Cap Screw

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

0.50 inches

Fastener Length

0.50 inches

Head Style

Flat countersunk

Head Diameter

Between 0.480 inches and 0.531 inches

Internal Drive Style

Hexagon

Thread Diameter

0.25 inches

Width Across Flats

0.15 inches

Thready Qty Per Inch (tpi)

Countersink Angle

82.0 degrees

Material

Steel

Thread Series Designator

Unrc

NSN

5305-01-620-7629

Part Number

16990-4C-8B

Description

Screw,cap,socket Head

CAGE

71838

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 16990-4C-8B NSN 5305-01-620-7629

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:

096640

UFC:

50600

LTL:

70.0

LCL:

WCC:

713

TCC:

SHC:

ACC:

Trailers/Vehicles

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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