Model: NAS514P428-14B

Machine Screw

Special Features:

Unichrome dip bulletin 65-b-cd

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.804 inches and 0.875 inches

Fastener Length

0.875 inches

Head Style

Flat countersunk

Head Diameter

Between 0.491 inches and 0.503 inches

Internal Drive Style

Cross recess type 1

Thread Diameter

0.250 inches

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

125000 pounds per square inch

Hardness Rating

Between 26.0 rockwell c and 32.0 rockwell c

Countersink Angle

Between 99.0 degrees and 101.0 degrees

Part Name Assigned By Controlling Agency

Navy special project

Screw Material

Steel comp 4037 or steel comp 8630

Screw Surface Treatment

Cadmium and chromate

Screw Surface Treatment Specification

Qq-p-416, type 2, class 2 federal specification single treatment response

Color

Black

Thread Series Designator

Unjf

Specification Data

80205-nas514 professional/industrial association standard

NSN

5305-01-346-4448

Part Number

NAS514P428-14B

Description

Screw,machine

CAGE

80205

An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. See also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.

Part NAS514P428-14B NSN 5305-01-346-4448

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

06657

FIIG:

A500D0

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:

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:

133300

UFC:

63220

LTL:

RATING VARIABLE

LCL:

WCC:

72E

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