Model: MS21318-29

Drive Screw

Properties:

Fastener Length

Between 0.359 inches and 0.391 inches

Head Style

Round

Head Diameter

Between 0.240 inches and 0.260 inches

Head Height

Between 0.091 inches and 0.103 inches

Pilot Diameter

Between 0.112 inches and 0.116 inches

Pilot Length

0.062 inches

Features Provided

Casehardened

Nonmachine Thread Style

Drive screw (type u)

Nonmachine Thread Diameter

0.138 inches

Material

Steel

Surface Treatment

Cadmium and chromate

Special Test Features

Special quality control testing

Surface Treatment Specification

Qq-p-416 type 2 cl 3 federal specification all treatment responses

Test Data Document

81349-mil-p-23199 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).

Nondefinitive Specification/std Data

U type

Departure From Cited Designator

Material must conform to ships parts control center special quality control provisions

NSN

5305-00-006-4743

Part Number

MS21318-29

Description

Screw,drive

CAGE

96906

A hardened cylindrical fastener with multiple spiral flutes on its shank. It also has an end smaller in diameter than the outside diameter of the spiral flutes, which acts as a pilot when driven into a drilled hole.

Part MS21318-29 NSN 5305-00-006-4743

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

15896

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:

0.2000lbs

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