Model: 12981727-1

Thumbscrew

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.490 inches and 0.510 inches

Fastener Length

Between 3.700 inches and 3.720 inches

Head Style

Knurled no. 6

Head Diameter

Between 0.495 inches and 0.505 inches

Head Height

Between 2.020 inches and 2.040 inches

Distance From Largest Bearing Surface Of Head To End Of Third Diameter

3.710 inches

Thread Diameter

0.250 inches

Nonstandard Thread Pitch Diameter

+0.2139/+0.2175 inches

Thready Qty Per Inch (tpi)

Material

Steel comp 303

Material Specification

Astm a581, a582 or ams 5640 assn standard single material response

Surface Treatment Specification

Mil-std-171, para 5.4.1 military standard single treatment response

Thread Series Designator

Unc

NSN

5305-01-450-3253

Part Number

12981727-1

Description

Thumbscrew

CAGE

19200

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 12981727-1 NSN 5305-01-450-3253

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:

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