Model: 221B1408P1

Internal Wrenching Bolt

Special Features:

Apply mil-l-8937 to threads, shank and underside of head; remainder of head and internal drive to be lube free

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.429 inches and 0.449 inches

Fastener Length

3.750 inches

Head Style

Flat chamfer

Head Diameter

0.308 inches

Head Height

0.185 inches

First Diameter From Head

Between 0.164 inches and 0.169 inches

Distance From Largest Bearing Surface Of Head To End Of First Diameter

3.311 inches

Internal Drive Style

Hexagon

Thread Diameter

0.190 inches

Width Across Flats

Between 0.1562 inches and 0.1587 inches

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

140000 pounds per square inch

Externally Relieved Body Diameter Quantity

Material

Iron alloy 660

Material Specification

Ams5731 assn standard single material response or ams5737 assn standard single material response

Surface Treatment

Passivate

Surface Treatment Specification

Qq-p-35 federal specification single treatment response

Thread Series Designator

Unjf

NSN

5306-01-348-2652

Part Number

221B1408P1

Description

Bolt,internal Wrenching

CAGE

99971

An externally threaded fastener whose threaded portion is of one nominal diameter, no. 10 (0.190 in.) (5 mm) or larger. It is designed with an internal socket or internal multiple spline for use with an internal driver. The head is beveled (conical) or cylindrical in shape. Items with cylindrical shaped heads must have an externally relieved body. A locking feature may be incorporated in the design of the head or threads. See also screw, cap, socket head. Excludes setscrew; screw, shoulder; bolt, shoulder; screw, externally relieved body; bolt, externally relieved body; and screw, machine.

Part 221B1408P1 NSN 5306-01-348-2652

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

06666

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:

574

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