Model: 8-9-20

Ribbed Shoulder Bolt

Properties:

Thread Class

Thread Direction

Left-hand

Thread Length

Between 1.191 inches and 1.221 inches

Fastener Length

Between 2.810 inches and 2.841 inches

Head Style

Flat chamfer

Head Diameter

Between 1.310 inches and 1.370 inches

Head Height

Between 0.310 inches and 0.341 inches

Shoulder Diameter

0.974 inches first shoulder and 0.975 inches first shoulder

Shoulder Length

1.160 inches first shoulder and 1.220 inches first shoulder

Rib Major Diameter

Between 0.998 inches and 1.008 inches

Rib Length

Between 0.560 inches and 0.622 inches

Distance From Largest Diameter Of Bearing Surface Of Head To Ribs

Between 0.349 inches and 0.411 inches

Rib Minor Diameter

0.946 inches

Rib Quantity

Thread Diameter

0.750 inches

Thready Qty Per Inch (tpi)

Rib Included Angle

90.0 degrees

Shoulder Shape

Round first shoulder

Material

Steel comp 3130 or steel comp 3140

Surface Treatment

Cadmium or zinc

Surface Treatment Specification

Qq-p-416, type 2, cl 2 federal specification 1st treatment response or qq-z-325, type 2, cl 2 federal specification 2nd treatment response

Thread Series Designator

Unf

NSN

5306-00-797-9320

Part Number

8-9-20

Description

Bolt,ribbed Shoulder

CAGE

60528

An externally threaded fastener whose threaded portion is of one nominal diameter. It has a series of longitudinal ribs, splines or serrations on all or a part of the shoulder. The minor diameter of the ribs must be greater than the major diameter of the threads. See also bolt, ribbed neck.

Part 8-9-20 NSN 5306-00-797-9320

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

16014

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:

0.6000lbs

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