Model: C7997-4-12

Panel Screw Assembly

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.360 inches and 0.390 inches

Fastener Length

1.500 inches

Head Style

Hexagon extended washer

Head Height

0.240 inches

Width Between Flats

Between 0.350 inches and 0.390 inches

Extended Washer Diameter

Between 0.420 inches and 0.460 inches

Thread Diameter

0.250 inches

Thready Qty Per Inch (tpi)

Material

Steel comp 302 or steel comp 304 or steel comp 304l or steel comp 303

Material Specification

Qq-s-763 federal specification 1st material response or qq-s-763 federal specification 2nd material response or qq-s-763 federal specification 3rd material response or astm a582 assn standard 4th material response

Surface Treatment

Passivate

Surface Treatment Specification

Qq-p-35 federal specification single treatment response

Thread Series Designator

Unf

NSN

5305-01-207-3028

Part Number

C7997-4-12

Description

Screw Assembly,panel

CAGE

81755

A headed, threaded fastening device over which may be assembled; (1) a stand-off; (2) a flanged bushing with washer(s) and/or a shouldered bushing without a flange, or it may have an internally threaded sleeve that is an integral part of the screw; a washer and an externally thread self-locking bushing that is driven by an inserted driver. Attached to panel by threaded bushing or by flaring end of stand-off, or bushing. Used in conjunction with a speed nut, nut plate, or driven into a threaded hole in the item that the panel is fastened to. May be spring loaded.

Part C7997-4-12 NSN 5305-01-207-3028

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

33044

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:

Packaging & Shipping

Est. Pack Size

Est. Pack Weight

Est. Item Weight

Est. Item Dim.

Pack Size:

Paclk Weight:

0.1000lbs

Item Weight:

Item Dim:

OPI

SPI No.

SPI Rev.

SPC Mkg.

LVL A

LVL B

OPI:

SPI No.:

SPI Rev.:

SPC Mkg:

LVL_A:

LVL_B:

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