scope:

This Military Standard is approved for use by HQ AFLC CASO/LODS, Federal Center, Battle Creek, MI 49016, Department of the Air Force, and is available for use by all Departments and agencies of the Department of Defense.

(a) S (PITCH) AND T (PITCH) TO BE CONCENTRIC WITHIN .010 TOTAL INDICATOR READING (TIR).

(b) DIAMETERS N, H, AND T (PITCH) SHALL BE CONCENTRIC WITHIN .005 TIR.

MATERIAL: STEEL; ALUMINUM ALLOY; CORROSION RESISTANT STEEL (CRES); TITANIUM ALLOY; BARS, SHAPES OR FORGINGS (SEE PROCUREMENT SPECIFICATION).

FINISH: SEE PROCUREMENT SPECIFICATION.

NO CODE LETTER IN PART NUMBER FOR STEEL. ADD D IN PLACE OF DASH FOR ALUMINUM ALLOY (EXCEPT 7075-T73). ADD J IN PLACE OF DASH FOR CRES, TYPE 304. ADD K IN PLACE OF DASH FOR CRES, TYPE 316. ADD S IN PLACE OF DASH FOR CRES, TYPE 347. ADD T IN PLACE OF DASH FOR TITANIUM ALLOY. ADD W IN PLACE OF 7075-T73 ALUMINUM ALLOY.

TITANIUM IS NOT RECOMMENDED FOR USE IN OXYGEN SYSTEMS.

EXAMPLE OF PART NUMBERS:

MS24397-4 - REDUCER, ¼ TO ¾ TUBING, STEEL. MS24397D4 - REDUCER, ¼ TO ¾ TUBING, ALUMINUM ALLOY (EXCEPT 7075-T73). MS24398J4 - REDUCER, ¼ TO ¾ TUBING, CRES, TYPE 304. MS24398K4 - REDUCER, ¼ TO ¾ TUBING, CRES, TYPE 316. MS24397S4 - REDUCER, ¼ TO ¾ TUBING, CRES, TYPE 347. MS24397T4 - REDUCER, ¼ TO ¾ TUBING, TITANIUM ALLOY. MS24397W4 - REDUCER, ¼ TO ¾ TUBING, 7075-T73 ALUMINUM ALLOY.

IN ADDITION TO THE SAMPLING REQUIREMENTS OF THE PROCUREMENT SPECIFICATION, 100% OF THE REDUCERS OF A LOT SHALL BE INSPECTED FOR THE FOLLOWING: LENGTH AND DIAMETER OF THREAD RELIEF. SURFACE SMOOTHNESS OF THREAD RELIEF AND ADJACENT HEX FACE.

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

DIMENSIONS IN INCHES. UNLESS OTHERWISE SPECIFIED, TOLERANCES: FRACTIONS +1/64, ANGLES ±½°.

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

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