Model: NAFB1638B

Shoulder Bolt

Special Features:

Undercut between head and shoulder 1.219 in. @dia by 0.188 in. Lg, undercut between shoulder and thd 1.000 in. Diameter by 0.281 in. Lg, flat point 0.438 in. Lg by 1.000 in. Dia

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

1.032 inches

Fastener Length

4.562 inches

Head Style

Dee chamfer

Head Diameter

1.750 inches

Head Height

0.625 inches

Distance From Centerline To Flat

0.688 inches

Shoulder Diameter

1.312 inches first shoulder

Shoulder Length

2.624 inches first shoulder

Shank Unthreaded Hole Diameter

0.188 inches all holes

Thread Diameter

1.125 inches

Thready Qty Per Inch (tpi)

Hardness Rating

27.0 rockwell c and 32.0 rockwell c

Distance From Head Largest Bearing Surface To Shank Hole Center

4.281 inches all holes

Shoulder Shape

Round first shoulder

Material

Steel

Material Specification

Mil-s-890 alloy 2 military specification single material response

Thread Series Designator

Unf

NSN

5306-00-281-3259

Part Number

NAFB1638B

Description

Bolt,shoulder

CAGE

82796

An externally threaded fastener whose threaded portion is of one nominal diameter, no. 10 (0.190 in.) (5 mm) or larger. It has a round unthreaded neck or shank all or part of which is of greater diameter than the threaded portion. The head is not designed to be held or driven with an inserted drivers. A locking feature may be incorporated in the design of the head or threads. For items with a thread diameter smaller than no. 10 (0.190 in.) (5 mm) and those items with an inserted drive head, use screw, shoulder. For items which are no. 10 (0.190 in.) (5 mm) or larger in size and are both shouldered and have an externally relieved body, use bolt, externally relieved body. Excludes thumbscrew.

Part NAFB1638B NSN 5306-00-281-3259

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

04905

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:

2.2000lbs

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