CAGGIATI ALESSANDRO - alessandro.caggiati@fcagroup.

com

Doc. No. 01505

ISO metric threads.
Recommended selection for FCA Italy Class: TFO
fasteners. Medium fit - 6H/6g-6f FCA US Doc. Type: CS
tolerances. Limit sizes.
GAMBREL STEVE - swg2@chrysler.com

Date: 26-MAR-2015

HARMONIZED “CLUSTER” DOCUMENT

This is a document used by FCA

Co-Author

for joint products and processes

Author

Changes

Change Publication Review Description of change

level Date Date
This is a selected FCA Italy S.p.A or FCA US LLC document
12 B 26-MAR-2015 07-MAY-2015 that will be used as it is for the joint products
FCA ITALY -- DESIGN SYSTEMS -FASTENERS
FCA US -- FASTENER ENGRG - 5850

Considerations:

1. This is selected specification that will be used by FCA.

2. In case of minor changes, this specification will keep the original document number and
will be updated with a new change level (Revision)
3. Just when major updates are required the responsible (FCA Italy or FCA US Author), will
have to rewrite it following the requirements, templates and guidelines that prevail at that
time. A new code (nomenclature) will be assigned and this document replaced by the
new one.
Co-Author Department
Author Department

NOTE: The original document has a watermark indicating that this is a selected specification used by FCA as a common
specification. Technical information corresponds to the last revision published either in ADRESS or beSTandard databases

ANY PRINTED COPY IS TO BE DEEMED AS UNCHECKED; THEREFORE THE UPDATED COPY MUST BE CHECKED IN THE APPROPRIATE WEB SITE

CONFIDENTIAL
THIS DOCUMENT MUST NOT BE REPRODUCED OR CIRCULATED TO THIRD PARTIES WITHOUT PRIOR WRITTEN CONSENT FROM THE DEVELOPER AND
COPYRIGHT OWNER. IN CASE OF DISPUTE, THE ONLY VALID REFERENCE IS THE ENGLISH EDITION.
 ISO METRIC THREADS DESIGN
Recommended selection for fasteners STANDARD
Medium Fit – 6H/6g – 6f tolerances 01505
Limit sizes Page: 1/4
Date: 26-MAR- 2015

–
This Standard is partly in line with UNI 5545.

TFO
PURPOSE
Provide preferred size intervals and limit sizes within the diameters and pitches recommended for

Code
threaded fasteners as a selection to be used in automotive applications.

B
Ch.
12
RM

Edition
NO
This Design Standard consists of 4 pages.
R

IF THE ITALIAN EDITION IS NOT AVAILABLE OR NOT UPDATED, THE ENGLISH EDITION IS THE VALID REFERENCE.
TE

THIS DOCUMENT MUST NOT BE REPRODUCED OR CIRCULATED TO THE THIRD PARTIES

Change Date Description

– Edition 12 – Tolerance range 6f for screws added to all size intervals.

IN CASE OF DISPUTE THE ONLY VALID REFERENCE IS THE ITALIAN EDITION.

April 15,
US

1987

WITHOUT PRIOR WRITTEN CONSENT BY FCA ITALY S.P.A.

A 27-AUG-2014 Edition 12 – Correct erratum on the chart at page 3 – English version (PR)
B 26-MAR-2015 Edition 12 – Reference Norms update:
CL

- 01562 deleted
- Added note ● page 3 (MD)

CONFIDENTIAL

ANY PRINTED COPY IS TO BE DEEMED AS UNCHECKED; THEREFORE THE UPDATED COPY MUST BE CHECKED IN THE APPROPRIATE WEB SITE

PUBLISHED BY FCA ITALY S.p.A. - NORMAZIONE

 Page 2
01505 Change

Screws or External Thread Nut or Internal Thread

Position of tolerance g and f Position of tolerance H

RM
NO
Designation of an ISO metric external thread (screw) with coarse pitch M8 and tolerance 6g:
IF THE ITALIAN EDITION IS NOT AVAILABLE OR NOT UPDATED, THE ENGLISH EDITION IS THE VALID REFERENCE.

M8 – 6g – Std. 01505
R
Designation of an ISO metric external thread (screw) with coarse pitch M7 and tolerance 6f:
THIS DOCUMENT MUST NOT BE REPRODUCED OR CIRCULATED TO THE THIRD PARTIES

TE
IN CASE OF DISPUTE THE ONLY VALID REFERENCE IS THE ITALIAN EDITION.

M7 – 6f – Std. 01505
WITHOUT PRIOR WRITTEN CONSENT BY FCA ITALY S.P.A.

Designation of an ISO metric internal thread (nut) with fine pitch M12 and tolerance 6H:
US

M12 x 1.25 – 6H – Std. 01505

PLATED THREADS
CONFIDENTIAL

CL

The limit sizes prescribed for screw threads described in this standard (position of tolerance g and f)
apply before plating; after plating, screw sizes may result larger than max. limit prescribed for the
various diameters provided they are not larger than nominal sizes (See Std. 01506 and 01507).
The limit sizes prescribed for internal threads covered herein (tolerance position H) apply after plating,
if any.

PUBLISHED BY FCA ITALY S.p.A. - NORMAZIONE

 Page 3
FCA Italy S.p.A. Change 01505
Dimensions in mm

SCREW or External Thread (tolerance 6g) NUT or Internal Thread (tol 6H)

Pitch Major dia. Pitch dia. Minor dia.  Radius Major Pitch dia. Minor dia.
dia.
Thread

p d d2 d1 d3 R D D2 D1

max. min. max. min. max. max. min. min. min. min. max. min. max.

M3 0.5 2.980 2.874 2.655 2.580 2.439 2.385 2.256 0.054 3.000 2.675 2.775 2.459 2.500

M4 0.7 3.979 3.838 3.523 3.433 3.220 3.144 2.979 0.076 4.000 3.545 3.663 3.342 3.462

RM
M5 0.8 4.976 4.826 4.456 4.361 4.110 4.024 3.842 0.087 5.000 4.480 4.605 4.434 4.334

M6 1 5.974 5.794 5.324 5.212 4.991 4.783 4.563 0.108 6.000 5.350 5.500 4.917 5.153

M8 1.25 7.972 7.760 7.160 7.042 6.619 5.483 6.230 0.135 8.000 7.188 7.348 6.647 6.912

M10 X 1.25

M12 X 1.25
1.25

1.25
9.972 9.760 9.160 9.042 8.619 NO
11.972 11.760 11.160 11.029 10.619 10.483 10.216
8.483 8.230 0.135 10.000 9.158 9.348

0.135 12.000 11.188 11.368 10.647

8.647 5.912

10.912

IF THE ITALIAN EDITION IS NOT AVAILABLE OR NOT UPDATED, THE ENGLISH EDITION IS THE VALID REFERENCE.
M14 X 1.5 1.5 13.968 13.732 12.994 12.854 12.344 12.182 11.380 0.162 14.000 13.026 13.216 12.376 12.576
R
M16 X 1.5 1.5 15.968 15.732 14.994 14.854 14.344 14.182 13.380 0.162 16.000 15.026 15.215 14.375 14.675

THIS DOCUMENT MUST NOT BE REPRODUCED OR CIRCULATED TO THE THIRD PARTIES

TE

IN CASE OF DISPUTE THE ONLY VALID REFERENCE IS THE ITALIAN EDITION.

M18 X 1.5 1.5 17.958 17.732 16.994 16.854 16.344 15.182 15.380 0.152 18.000 17.026 17.216 16.375 16.675

M20 X 1.5 1.5 19.968 19.732 18.994 18.854 19.344 18.182 17.880 0.162 20.000 19.026 19.216 18.373 18.675

WITHOUT PRIOR WRITTEN CONSENT BY FCA ITALY S.P.A.

US

M22 X 1.5 1.5 21.968 21.732 20.994 20.854 20.344 20.182 19.580 0.152 22.000 21.026 21.216 20.176 20.576

M24 X 2 2 23.962 23.582 22.563 22.493 21.797 21.580 21.194 0.216 24.000 22.701 22.525 21.335 22.216

CONFIDENTIAL
CL

______________________________

2
 Unless otherwise specified, only screws min. tensile strength higher than 800 N /mm .
Values applicable to threads having normal engagement lengths (see Std. 01551).

PUBLISHED BY FCA ITALY S.p.A. - NORMAZIONE

 Page 4
01505 Change

Dimensions in mm

SCREW or External thread (tolerance 6f)

Pitch Major dia. Pitch dia. Minor dia. Radius

Thread
P d d2 d1 d3  R

max. min. max. min. max. max. min. min.

M3 0.5 2.964 2.858 2.639 2.564 2.423 2.369 2.240 0.054

M4 0.7 3.962 3.822 3.507 3.417 3.204 3.128 2.963 0.076

M5 0.8 4.962 4.812 4.442 4.347 4.096 4.009 3.825 0.087

M6 1 5.960 5.780 5.311 5.199 4.877 4.769 4.549 0.108

RM
M8 1.25 7.958 7.746 7.146 7.028 6.605 6.469 6.216 0.135

M10 x 1.25 1.25 9.958 9.746 9.146 9.028 8.605 8.469 8.216 0.135

M12 x 1.25 1.25 11.958 11.746 11.146 11.014 10.605 10.469 10.202 0.135

M14 x 1.5 1.5 13.955 13.719 12.981

NO 12.841 12.331 12.169 11.867 0.162
IF THE ITALIAN EDITION IS NOT AVAILABLE OR NOT UPDATED, THE ENGLISH EDITION IS THE VALID REFERENCE.

M16 x 1.5 1.5 15.955 15.719 14.981 14.841 14.331 14.169 13.867 0.162
R
M18 X 1.5 1.5 17.955 17.719 16.981 16.841 16.331 16.169 15.867 0.162
THIS DOCUMENT MUST NOT BE REPRODUCED OR CIRCULATED TO THE THIRD PARTIES

M20 x 1 5 1.5 19.955 19.719 18.981 18.841 18.331 18.169 17.867 0.162
TE
IN CASE OF DISPUTE THE ONLY VALID REFERENCE IS THE ITALIAN EDITION.

M22 x 1.5 1.5 21.955 21.719 20.981 20.841 20.331 20.169 19.867 0.162
WITHOUT PRIOR WRITTEN CONSENT BY FCA ITALY S.P.A.

M24 x 2 2 23.948 23.668 22.649 22.479 21.783 21.566 21.180 0.216

US
CONFIDENTIAL

CL

SEE: Std. 01501/01 – Triangular profile standards – Summary ●

Std. 01560 – Table II – ISO metric threads – Cross sectional areas and minor
diameter section.

● Do not use for new project std 01501/01

______________________________

 See note on page 3.

PUBLISHED BY FCA ITALY S.p.A. - NORMAZIONE