642AS1631-6

Close Tolerance Screw

NSN 5305-01-241-2653

DEMIL

Shelf Life

UOM

NIIN

Demil:

Shelf Life:

N/A

UOM:

1 EA

NIIN:

012412653

Product Features

Furnished with rubber o-ring

Technical Specifications of NSN

Thread Class:

Thread Direction:

Right-hand

Thread Length:

Between 0.444 inches and 0.494 inches

Fastener Length:

Between 1.579 inches and 1.609 inches

Head Style:

Flat countersunk undercut

Head Diameter:

Between 0.501 inches and 0.507 inches

Head Height:

Between 0.071 inches and 0.073 inches

Grip Diameter:

Between 0.2485 inches and 0.2495 inches

Internal Drive Style:

High-torque

Thread Diameter:

0.250 inches

Grip Length:

Between 1.115 inches and 1.135 inches

Thready Qty Per Inch (tpi):

Countersink Angle:

100.0 degrees

Surface Finish:

32.0 microinches bearing surface of head

Surface Finish:

32.0 microinches grip

Surface Finish:

32.0 microinches threads

Material:

Steel comp xm-13

Material Specification:

Ams 5629 assn standard single material response

Surface Treatment:

Aluminum and chromate

Surface Treatment Specification:

Mil-c-83488 type 2 cl 3 military specification single treatment response

Thread Series Designator:

Unjf

NSN:

5305-01-241-2653

Item Name:

Screw,machine,flat-head,close Tolerance

Cage Code:

30003

Other Related Parts

Part Number

Cage

RNCC

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Status

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80539

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73197

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Cage Code:

L4528

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Cage Code:

0ZC92

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Cage Code:

17446

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06710

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Cage Code:

06725

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Cage Code:

06950

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Cage Code:

1VSL7

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3M925C4-18A

Cage Code:

27624

RNCC:

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3M925C4-18A

Cage Code:

92215

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3M925C4-18A

Cage Code:

56878

RNCC:

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Cage Code:

58998

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Cage Code:

59563

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Cage Code:

60516

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Cage Code:

K5673

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3M925C4-18A

Cage Code:

0PTK6

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3M925C4-18A

Cage Code:

70236

RNCC:

RNVC:

RNAAC:

Status:

MSDS:

SADC:

Part Identification

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

29294

FIIG:

A003B0

Concept No.:

App. Key:

Cond. Code:

Status:

Part Materials

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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Pricing & Availability

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Definition Definition of approved item name (AIN): "Close Tolerance Flat-head Machine Screw"

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.