Model: CA2730-4-20

Close Tolerance Screw

Special Features:

Retaining elements in shank

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

0.270 inches

Fastener Length

1.688 inches

Head Style

Flat chamfer

Head Diameter

Between 0.3737 inches and 0.3742 inches

Head Height

Between 0.253 inches and 0.273 inches

Grip Diameter

Between 0.2487 inches and 0.2492 inches

Shank Unthreaded Hole Diameter

0.076 inches first hole and 0.086 inches first hole

Internal Drive Style

Hexagon

Thread Diameter

0.250 inches

Grip Length

Between 1.250 inches and 1.270 inches

Width Across Flats

Between 0.1875 inches and 0.1900 inches

Thready Qty Per Inch (tpi)

Distance From Head Largest Bearing Surface To Shank Hole Center

1.349 inches first hole

Surface Finish

32.0 microinches

Material

Steel

Surface Treatment

Passivate

Surface Treatment Specification

Zc00035 fscm 29372 mfr ref single treatment response

Thread Series Designator

Unf

NSN

5305-00-061-9139

Part Number

CA2730-4-20

Description

Screw,close Tolerance

CAGE

29372

A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.

Part CA2730-4-20 NSN 5305-00-061-9139

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

29294

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:

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