Model: 20778-004 FIND 38

Socket Head Cap Screw

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

1.375 inches

Fastener Length

Between 4.920 inches and 5.000 inches

Head Style

Flat chamfer

Head Diameter

Between 0.642 inches and 0.656 inches

Head Height

Between 0.430 inches and 0.437 inches

Hole Diameter

Between 0.061 inches and 0.067 inches

Internal Drive Style

Hexagon

End Application

Deck machinery; towed array handling equipment; ssbn mk-118 fire control sys; los angeles class ssn (688); sturgeon class ssn (637); seawolf class ssn; sub control & navigation sys; sub armament & fire control; sub acoustic sonar sys; submarine hydraulic systems

Thread Diameter

0.438 inches

Width Across Flats

Between 0.375 inches and 0.379 inches

Hole Quantity

Hole Type

Drilled

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

180000 pounds per square inch

Hardness Rating

39.0 rockwell c and 45.0 rockwell c

Minimum Yield Strength

155000 pounds per square inch

Hole Configuration Style

Round internal hexagon

Material

Steel

Surface Treatment

Cadmium and chromate

Surface Treatment Specification

Qq-p-416 type 2 cl 2 federal specification single treatment response

Thread Series Designator

Unrf

Specification Data

80205-nas1351 professional/industrial association standard

NSN

5305-01-287-7525

Part Number

20778-004 FIND 38

Description

Screw,cap,socket Head

CAGE

78062

An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See bolt, internal wrenching. Excludes screw, shoulder; and screw, machine.

Part 20778-004 FIND 38 NSN 5305-01-287-7525

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

16282

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:

0.3000lbs

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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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