Model: LK21091-7016

Socket Head Cap Screw

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.631 inches and 0.697 inches

Fastener Length

Between 1.766 inches and 1.812 inches

Head Style

Flat countersunk

Head Diameter

Between 0.805 inches and 0.890 inches

Locking Feature

Patch threads or pellet threads or strip threads

Internal Drive Style

Cross recess type 1

End Application

Spec item

Thread Diameter

0.438 inches

Thready Qty Per Inch (tpi)

Hardness Rating

26.0 rockwell c and 32.0 rockwell c

Countersink Angle

100.0 degrees

Material

Steel comp 4037 or steel comp 8630

Material Specification

Ams 6300 assn standard 1st material response or mil-s-6050 military specification 2nd material response

Surface Treatment

Cadmium and chromate

Surface Treatment Specification

Qq-p-416, cl 3 federal specification single treatment response

Thread Series Designator

Unf

NSN

5305-01-045-9549

Part Number

LK21091-7016

Description

Screw,cap,socket Head

CAGE

26304

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 LK21091-7016 NSN 5305-01-045-9549

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:

096640

UFC:

50600

LTL:

70.0

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