Model: C-81.121-274825

Hexagon Head Cap Screw

Special Features:

Washer bearin surface serrated

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.670 inches and 0.750 inches

Fastener Length

Between 0.720 inches and 0.750 inches

Head Style

Hexagon extended washer

Head Height

Between 0.204 inches and 0.222 inches

Width Between Flats

Between 0.367 inches and 0.375 inches

Extended Washer Diameter

Between 0.513 inches and 0.531 inches

Extended Washer Thickness

Between 0.019 inches and 0.028 inches

Thread Diameter

0.250 inches

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

115000 pounds per square inch

Hardness Rating

22.0 rockwell c and 35.0 rockwell c

Material

Steel comp 1018 or steel comp 1021 or steel comp 1022

Material Specification

Sae assn standard single material response

Surface Treatment

Zinc

Thread Series Designator

Unc

NSN

5305-01-056-1501

Part Number

C-81.121-274825

Description

Screw,cap,hexagon Head

CAGE

24617

An externally threaded fastener designed for insertion into holes in assembled parts, for mating with a preformed internal thread and for tightening or releasing by torquing the head. the threaded and unthreaded portions are both of the same nominal diameter of 0.190 inch (5 mm) or larger. head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. the thread length being the controlled dimension, the grip length is not specified. a locking feature may be incorporated in the design of the head or threads. the head is not designed to be held or driven with an inserted driver or by the thumb and fingers. excludes bolt,machine; bolt,externally relieved body; bolt,internal wrenching; and screw,cap,socket head.

Part C-81.121-274825 NSN 5305-01-056-1501

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

18257

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:

0.1000lbs

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