Model: MS21250

Machine Bolt

Special Features:

12-point, 180 ksi ftu, 450 f

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

0.579 inches

Fastener Length

1.678 inches

Head Style

Double hexagon w/hole

Head Height

0.348 inches

Width Between Flats

0.375 inches

Extended Washer Diameter

Between 0.521 inches and 0.531 inches

Extended Washer Thickness

0.82 inches

End Application

Mk 7 mod 1 ra

Thread Diameter

0.3125 inches

Nonstandard Thread Pitch Diameter

-0.05 to 0.08 inches

Min. Tensile Strength (psi)

180000 pounds per square inch

Hardness Rating

39.0 rockwell c and 43.0 rockwell c

Part Name Assigned By Controlling Agency

Bolt, tension, steel, external wrenching, flanged

Material

Steel comp e4340 or steel comp 8740 or steel comp 4140

Surface Treatment

Cadmium and chromate

Surface Treatment Specification

Qq-p-416, ty2, cl3 federal specification single treatment response

Thread Series Designator

Unjf

NSN

5306-01-616-4012

Part Number

MS21250

Description

Bolt,machine

CAGE

96906

An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. the threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. a locking feature may be incorporated in the design of the head or threads. head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. for items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, bolt, shear. See also screw, cap, hexagon head and screw, machine.

Part MS21250 NSN 5306-01-616-4012

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

01847

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:

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:

573

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