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P-38 Engineering Drawing
Opener, Can, Hand, Folding, Type I
NSN 7330-00-242-3506

MILITARY SPECIFICATION - OPENERS, CAN, HAND, FOLDING

Pertinent Documents:  

A-A-52203 - 1996
2-9-148
MIL-O-20582
MIL-O-20582A - 1956
MIL-O-20582B
MIL-O-20582C - 1967
MIL-O-20582D - 1970
MIL-O-20582E - 1988
7330-00-242-3506
7330002423506

Official Nomenclature: OPENER, CAN, HAND, FOLDING, TYPE I

This specification is mandatory for use by all Department and agencies of the Department of Defense.

1.1 Scope.  This specification covers a lightweight, folding, hand-operated can opener for severing tops of rimmed metal cans.

1.2 Classification.  The can openers shall be of the following types as specified (see 6.2):

     Type I - Small, for opening individual portion-sized cans in the field.
     Type II - Large, for opening group portion-sized cans in the field.

2.1.2 Other Government documents, drawings, and publications.  The following other Government documents, drawings, and publications form a part of this specification to the extent specified herein.  Unless otherwise specified, the issues shall be those in effect on the date of the solicitation.

DRAWINGS

     U.S. ARMY NATICK RESEARCH, DEVELOPMENT, AND ENGINEERING CENTER

          2-9-148 - Opener, Can, Hand, Folding, Type I; Can Opener and Directions for Use
          5-13-4260 - Opener, Can, Hand, Folding, Type II

3.2.1 Carbon Steel, sheet and strip.  The material for the can openers shall be carbon steel sheet and strip conforming to numbers 1050, 1055, or 1065 of QQ-S-700.

3.3 Design and Construction.  The can openers shall be designed and constructed as specified herein and as shown on the applicable drawing.  The openers shall completely sever the tops of circular, rectangular, or tray pack cans, as applicable, when tested as specified in 4.4.4.2.  The openers shall be assembled so the knife blade offers resistance to changing from the closed position to the open position and from the open position to the closed position.  Opening of the blade shall be accomplished by use of the hand without the use of an auxiliary instrument.  It is not required that the blade be retained firmly in the open position.

3.4  Identification Marking.  Each type I and type II can opener shall be permanently and distinctly stamped with letters " U.S. " and the manufacturer's name or trademark.  Markings shall be of the size and in the locations shown on the applicable drawing.  Markings shall be applied so there is no distortion or unevenness opposite the markings or penetration through the metal.

4.5.3 Cutting.  Each sample can opener shall be tested to determine that it completely severs the tops of both circular and rectangular cans as required by 3.3.  The test for the type I can opener shall be performed on one commercial No. 2 circular can and one rectangular can measuring approximately 6-5/8 inches long by 4-1/8 inches wide by a minimum of 1-5/8 inches high.  The test for the type II can opener shall be performed on one rectangular 1001 by 1206 by 200 size tray pack can, and on one commercial No. 10 circular can.  Any non-conformance with the specified requirements shall constitute failure of this test.

5.1.1.1  Unit packing.  Each can opener, with the blade folded flat, shall be packed in an envelope made from material comprised of not less than 0.0005-inch thick polyethylene coated on not less than 25 pounds basis weight (24 by 36 - 500) unbleached Kraft paper and the seams shall be formed by heat sealing.  The envelope containing one can opener shall be closed by heat sealing.  The maximum dimensions of the envelope shall be 1-11/16 inches by 2-3/4 inches for the type I can opener, and 2 inches by 3-1/4 inches for the type II can opener.

5.4.1 Special Marking.  Each unit pack shall have printed thereon a diagram and directions for use as shown on the applicable drawing.

6.1 Intended Use - The type I can opener is intended for use by military personnel in the field to open combat-type rations, in-flight rations, and emergency rations.  The type II can opener is intended for use by military personnel in the field to open military tray pack and round can components of the 36-soldier Tray Pack Meal Modules.

6.5 Subject term (key word) listing.
     Can
     Can opener
     Meal module
     T-ration
     Tray pack

P-51 Engineering Drawing
Opener, Can, Hand, Folding, Type II
NSN 7330-01-289-8827

 

Instruction Sheet for the P-38 Can Opener
(found this on the www.Olive-Drab.com website)

The following is a copy of an instruction sheet showing proper use of the P38 from a DoD specification MIL-O-20582A dated 28 November 1956. It gives the official name for the P38: OPENER, CAN, HAND, FOLDING.

Among many other details this specification states in Section 3.3.5 that "Marking for Identification" shall include: "The letters U.S. and the manufacturer's name or trade name..." Packaging is specified as an individual envelope which are then put in boxes of 1000 envelopes (for general use -- special purposes can differ). So if you pick up a P38 that is supposedly "genuine surplus" from the 1950s or so, look for the US and an individual envelope package.

		CAN OPENER DIRECTIONS
		1. Open blade. 2. Place can opener as shown in diagram. 3. Twist down to puncture slot in can top inside rim. 4. Cut top by advancing opener with rocking motion. Take small bites.
		STERILIZE BEFORE RE-USE
		Tie string through hole in opener to wash and sterilize with mess-gear if possible. When boiling water is unavailable, clean opener as thoroughly as possible and hold cutting blade over a match flame a few seconds immediately before use.

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