Model: A25A978-101-39

Thumbscrew

Special Features:

Shoulder tapered 5 degrees by 0.940 in. Lg

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

0.750 inches

Fastener Length

2.620 inches

Head Style

Knurled no. 1

Head Diameter

0.880 inches

Head Height

0.380 inches

Shoulder Diameter

0.499 inches first shoulder and 0.500 inches first shoulder

Shoulder Length

1.870 inches first shoulder

Point Style

Pointless

Thread Diameter

0.250 inches

Thready Qty Per Inch (tpi)

Shoulder Shape

Round first shoulder

Material

Steel comp 303

Material Specification

Qq-s-764 cond a federal specification single material response

Thread Series Designator

Unf

NSN

5305-00-005-1545

Part Number

A25A978-101-39

Description

Thumbscrew

CAGE

99696

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 A25A978-101-39 NSN 5305-00-005-1545

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:

573

TCC:

SHC:

ACC:

Equipment for Aircraft

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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