scope:

This military standard is approved by the Department of Defense and is mandatory on all activities. Selection for all new engineering and design applications and for repetitive use shall be made from this document.

2. FINISH: SEE PROCUREMENT SPECIFICATION.

3. BREAK ALL SHARP EDGES AND REMOVE ALL BURRS AND SLIVERS.

4. DIMENSIONS IN INCHES. UNLESS OTHERWISE SPECIFIED, TOLERANCES: DECIMALS ±.016.

5. PART NUMBERS:

[B circled] NO CODE LETTER IN PART NUMBER FOR CARBON STEEL. ADD D AFTER DASH NUMBER FOR ALUMINUM ALLOY (2014). ADD W IN PLACE OF DASH FOR ALUMINUM ALLOY (7075). ADD J IN PLACE OF DASH FOR CORROSION RESISTANT STEEL, TYPE 304. ADD K IN PLACE OF DASH FOR CORROSION RESISTANT STEEL, TYPE 316. ADD S AFTER DASH NUMBER FOR CORROSION RESISTANT STEEL, TYPE 347. PARTS ARE NOT TO BE MANUFACTURED FROM TYPE 304L STEEL AFTER 27 JUNE 1969. ADD T AFTER DASH NUMBER FOR TITANIUM ALLOY (6AL-4V).

EXAMPLES OF PART NUMBERS:

MS21925-4 - ELBOW, ¼ TUBING, CARBON STEEL. MS21925-4D - ELBOW, ¼ TUBING, ALUMINUM ALLOY (2014). MS21925W4 - ELBOW, ¼ TUBING, ALUMINUM ALLOY (7075). MS21925J4 - ELBOW, ¼ TUBING, CORROSION RESISTANT STEEL, TYPE 304. MS21925K4 - ELBOW, ¼ TUBING, CORROSION RESISTANT STEEL, TYPE 316. MS21925-4S - ELBOW, ¼ TUBING, CORROSION RESISTANT STEEL, TYPE 347. MS21925-4T - ELBOW, ¼ TUBING, TITANIUM ALLOY (6AL-4V).

[B circled]6. ITEMS CODED "C" ON PREVIOUS ISSUES OF THIS STANDARD ARE NO LONGER TO BE FURNISHED. UNLESS OTHERWISE SPECIFIED, PARTS CODED J, K, OR S (AT SUPPLIER'S OPTION) SHALL BE FURNISHED IN LIEU OF "C" CODED PARTS.

7. CERTAIN PROVISIONS (SCREW THREADS) OF THIS STANDARD ARE THE SUBJECT OF INTERNATIONAL STANDARDIZATION AGREEMENT ASCC AIR STD 17/15. WHEN REVISION OR CANCELLATION OF THIS STANDARD IS PROPOSED WHICH WILL AFFECT OR VIOLATE THE INTERNATIONAL AGREEMENT CONCERNED, THE PREPARING ACTIVITY WILL TAKE APPROPRIATE RECONCILIATION ACTION THROUGH INTERNATIONAL STANDARDIZATION CHANNELS, INCLUDING DEPARTMENTAL STANDARDIZATION OFFICES, IF REQUIRED.

[B circled]8. TITANIUM NOT RECOMMENDED FOR USE IN OXYGEN SYSTEMS.

9. FOR DESIGN FEATURE PURPOSES, THIS STANDARD TAKES PRECEDENCE OVER PROCUREMENT DOCUMENTS REFERENCED HEREIN.

10. REFERENCED DOCUMENTS SHALL BE OF THE ISSUE IN EFFECT ON DATE OF INVITATIONS FOR BID.

INTERNATIONAL INTEREST

SEE NOTE 7