Model: C4255

Ribbed Shoulder Bolt

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

0.437 inches

Fastener Length

Between 0.719 inches and 0.781 inches

Head Style

Hexagon

Head Height

0.234 inches

Width Between Flats

0.500 inches

Shoulder Diameter

0.3120 inches first shoulder

Shoulder Length

0.301 inches first shoulder and 0.321 inches first shoulder

Rib Major Diameter

Between 0.320 inches and 0.326 inches

Rib Length

0.187 inches

Distance From Largest Diameter Of Bearing Surface Of Head To Ribs

0.062 inches

Rib Quantity

Thread Diameter

0.312 inches

Thready Qty Per Inch (tpi)

Rib Included Angle

120.0 degrees

Shoulder Shape

Ribbed first shoulder

Material

Steel comp 1035

Material Specification

Qq-s-634 federal specification single material response

Surface Treatment

Cadmium

Thread Series Designator

Unf

NSN

5306-00-174-1939

Part Number

C4255

Description

Bolt,ribbed Shoulder

CAGE

08018

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 C4255 NSN 5306-00-174-1939

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:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

093486

UFC:

48950

LTL:

RATING VARIABLE

LCL:

50.0

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