Model: CA21166-4-2

Thumbscrew

Special Features:

0.112 diameter hole for plug at threaded end, 0.035 in. To 0.045 in. Wide by 0.024 in. To 0.034 in. Deep spline 3 places, spaced 120 degrees apart

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

0.487 inches

Fastener Length

1.059 inches

Head Style

Thumb no. 6

Head Height

0.625 inches

Width Between Flats

Between 0.076 inches and 0.079 inches

Shoulder Diameter

0.247 inches first shoulder and 0.249 inches first shoulder

Shoulder Length

0.150 inches first shoulder and 0.290 inches first shoulder

Point Style

Pointless

Thread Diameter

0.250 inches

Thready Qty Per Inch (tpi)

Shoulder Shape

Round first shoulder

Material

Steel comp 302b top of head or steel comp 303 top of head or steel comp 303 plus x top of head or steel comp 303se top of head or steel comp 303cu top of head or steel comp 303ma top of head or steel comp 304 top of head or steel comp 304l top of head

Material

Steel comp 8740 fastener or steel comp 4140 fastener

Material Specification

Mil-s-6049 military specification single material response fastener or mil-s-5626 military specification single material response fastener

Surface Treatment

Cadmium fastener and chromate fastener

Surface Treatment

Passivate top of head

Surface Treatment Specification

Qq-p-35 federal specification single treatment response top of head

Surface Treatment Specification

Qq-p-416 type 2 cl 2 military specification single treatment response fastener

Thread Series Designator

Unf

NSN

5305-01-174-0519

Part Number

CA21166-4-2

Description

Thumbscrew

CAGE

29372

An externally threaded fastener whose threaded portion is of one nominal diameter. It may have an unthreaded portion with a diameter less than, equal to, or greater than the diameter of the threaded portion. It has either a vertically flattened, circular knurled, or wing type head, all of which are designed for rotation by the thumb and fingers. For items having wrenching facilities such as socket recess, multiple spline or slot heads, use screw (as modified) or bolt (as modified).

Part CA21166-4-2 NSN 5305-01-174-0519

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

06673

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