Model: 278-20

Clevis Bolt

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.323 inches and 0.363 inches

Fastener Length

Between 1.833 inches and 1.853 inches

Head Style

Button

Head Diameter

Between 0.365 inches and 0.385 inches

Head Height

Between 0.083 inches and 0.103 inches

Groove Diameter

0.141 inches

Shank Unthreaded Hole Diameter

0.070 inches first hole and 0.080 inches first hole

Single Shear Strength

2125 pounds per square inch

Internal Drive Style

Slot

Thread Diameter

0.190 inches

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

125000 pounds per square inch

Hardness Rating

26.0 rockwell c and 32.0 rockwell c

Distance From Head Largest Bearing Surface To Shank Hole Center

0.136 inches first hole and 0.146 inches first hole

Material

Steel comp 8740 or steel comp 8630 or steel comp 8735 or steel comp 4140 or steel comp 4130 or steel comp 4037

Material Specification

Mil-s-6049 military specification 1st material response or mil-s-6050 military specification 2nd material response or mil-s-6098 military specification 3rd material response or mil-s-5626 military specification 4th material response or mil-s-6758 military specification 5th material response or mil-s-8695 military specification 6th material response

Surface Treatment

Cadmium and chromate

Surface Treatment Specification

Qq-p-416 type 2 cl 3 federal specification 5th treatment response

Thread Series Designator

Unf

Departure From Cited Document

Thread t per mil-s-7742 except major diameter is not to exceed max allow bolt shank d1a

NSN

5306-00-151-2308

Part Number

278-20

Description

Bolt,clevis

CAGE

45934

An externally threaded fastener whose threaded and unthreaded portions are of one nominal diameter and are separated by a narrow circumferential groove. The head is designed to be held or driven with an inserted driver. Excludes bolt, shear.

Part 278-20 NSN 5306-00-151-2308

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

06662

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:

1.6000lbs

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