Model: A91906-1

Socket Head Cap Screw

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.816 inches and 1.000 inches

Fastener Length

Between 0.970 inches and 1.000 inches

Head Style

Flat chamfer

Head Diameter

Between 0.735 inches and 0.750 inches

Head Height

Between 0.492 inches and 0.500 inches

Internal Drive Style

Hexagon

Thread Diameter

0.500 inches

Width Across Flats

0.375 inches

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

170000 pounds per square inch

Hardness Rating

37.0 rockwell c and 45.0 rockwell c

Part Name Assigned By Controlling Agency

Navy special project

Material

Steel comp 4340

Material Specification

Astm a574 assn standard single material response

Thread Series Designator

Unc

Nondefinitive Specification/std Data

2 type

NSN

5305-01-293-0977

Part Number

A91906-1

Description

Screw,cap,socket Head

CAGE

80020

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 A91906-1 NSN 5305-01-293-0977

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:

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