Model: NAS1581C4R4

Close Tolerance Screw

Special Features:

Internal drive ribbed

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.378 inches and 0.428 inches

Fastener Length

Between 0.638 inches and 0.668 inches

Head Style

Flat countersunk

Head Diameter

Between 0.3504 inches and 0.3988 inches

Grip Diameter

Between 0.2485 inches and 0.2495 inches

Internal Drive Style

Offset cruciform (torque set)

Thread Diameter

0.250 inches

Grip Length

Between 0.240 inches and 0.260 inches

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

160000 pounds per square inch

Countersink Angle

Between 99.0 degrees and 101.0 degrees

Surface Finish

32.0 microinches grip

Surface Finish

32.0 microinches threads

Material

Iron alloy 660

Material Specification

Ams 5731 assn standard single material response or ams 5732 assn standard single material response or ams 5737 assn standard single material response

Surface Treatment

Passivate

Surface Treatment Specification

Qq-p-35 federal specification single treatment response

Thread Series Designator

Unjf

Specification Data

80205-nas1581 professional/industrial association standard

NSN

5305-01-220-8681

Part Number

NAS1581C4R4

Description

Screw,close Tolerance

CAGE

80205

Part NAS1581C4R4 NSN 5305-01-220-8681

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:

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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