Hole Standards

Hole Metal Reference Standards

Hole reference standards are an economical way to provide many hole and notch configurations on the same plate or with several plates combined. A multiuse standard can provide both bolt hole and surface notches.

Standard Features

  • .005″+/- .002″ notch width
  • Certs on notches and material

Part Order Number Designators

Part numbers for metal standards are composed of the following designators:

RH 12 -C30M20 -7075T6
Series Number of Holes Notch Configuration
(see Notch Type Table)
Specific Alloy & Temper
(see US materials Table)

Part Numbers and Descriptions

To view additional table columns, slide right side of table to the left.

Part No. Description
RH12-C30M20-2024T3 12 holes, 1/8” thru 3/4” w/ .030” corner and .020” midwall notches
RH8-T20-2024T3 8 holes, 1/8” thru 1/2” w/ .020” thru-wall notches
RH12-M20-4340 12 holes, 1/8” thru 3/4” w/ .020” midwall notches
RH8-T20-4340 8 holes, 1/8” thru 1/2” w/ .020” thru-wall notches
RH7-T20-T6AL4V 7 holes, 5/32” thru 1/2” w/ .020” thru-wall notches
RH20-C30-304L 20 holes, 1/8” thru 3/4” w/ .030” corner notches

Notch Types (others available)

Notch Part No. Designator
.030” Corner -C30
.050” Corner -C50
.100” Corner -C100
.020” Thru-wall -T20
.040” Thru-wall -T40
.020”D x .100”L Mid-wall -M20
.030”D x .100”L Mid-wall -M30

US Materials (others available)

Type Alloy Part No. Designator
Aluminum 2024-T3 -2024T3
  7075-T6 -7075T6
Steel AS4340 -4340
  AS4130 -4130
Titanium 6AL4V -T6AL4V
Stainless Steel AISI 304L -304L
  AISI 303L -303
  15-5PH -155
  17-7PH -177
Inconel 600 -I600
  625 -I625
  700 -I700
Magnesium   -MAG
Bronze-Aluminum 13%IACS -BA13