• MIL S 8879 : C

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    SCREW THREADS, CONTROLLED RADIUS ROOT WITH INCREASED MINOR DIAMETER, GENERAL SPECIFICATION FOR

    Available format(s):  Hardcopy, PDF

    Superseded date:  02-24-2003

    Language(s): 

    Published date: 

    Publisher:  US Military Specs/Standards/Handbooks

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    Table of Contents - (Show below) - (Hide below)

    1 Scope
    2 Applicable documents
    3 Requirements
    4 Verification
    5 Packaging
    6 Notes

    Abstract - (Show below) - (Hide below)

    Covers detailed requirements for controlled root radius screw threads, UNJ symbol. Coverage includes applicable documents, tread application categories, thread series, designations, external threads, internal threads, pitch diameter, taper, incomplete threads, lead treads, surface roughness, runout, responsibility for inspection, thread characteristics verification, and lot quantities.

    General Product Information - (Show below) - (Hide below)

    Committee FSG 53
    Development Note C Notice 3 - Notice of Cancellation/Superseded by SAE AS 8879. (03/2003)
    Document Type Standard
    Publisher US Military Specs/Standards/Handbooks
    Status Superseded
    Superseded By
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    MIL DTL 6162 : C GENERATORS AND STARTER-GENERATORS, ELECTRICAL DIRECT CURRENT, NOMINAL 30 VOLTS, AIRCRAFT GENERAL SPECIFICATION FOR
    MIL F 8961 : A FASTENER ELEMENT, SELF-LOCKING, EXTERNALLY THREADED, 450 DEGREE F AND 1,200 DEGREE F
    NAS 496 : 0 BOLTS - INTERNAL WRENCHING
    MIL G 6162 : B GENERATOR AND STARTER GENERATOR, ELECTRIC DIRECT CURRENT, NOMINAL 30 VOLTS AIRCRAFT GENERAL SPECIFICATION
    MIL N 85615/10 : 0 NUT, SELF-SEALING, SELF-LOCKING, CRES, 160 KSI FTU, 250 DEGREES F & 450 DEGREES F
    JSSG 2006 : 0 JOINT SERVICE SPECIFICATION GUIDE - AIRCRAFT STRUCTURES
    MIL H 38360 : B HOSE, ASSEMBLIES, TETRAFLUOROETHYLENE, HIGH-TEMPERATURE, HIGH PRESSURE, 3000 PSI HYDRAULIC AND PNEUMATIC
    MIL F 18280 : F FITTING, FLARELESS TUBE, FLUID CONNECTION
    FED STD H28 : A SCREW THREAD STANDARDS FOR FEDERAL SERVICES
    MIL S 8710 : B STRAINER, AIRFRAME FUEL SYSTEM, GENERAL SPECIFICATION FOR
    MIL M 7997 : C MOTOR, AIRCRAFT HYDRAULIC, CONSTANT DISPLACEMENT GENERAL SPECIFICATION FOR
    MIL F 18240 : E FASTENER ELEMENT, SELF-LOCKING, THREADED FASTENER, 250 DEG F MAXIMUM
    NAS 1068 : 0 NUT, SELF-LOCKING, PLATE, TWO LUG, LOW-HEIGHT, C'BORED, FLOATING, REDUCED RIVET SPACING
    NASM 8846 : 0 INSERT, SCREW-THREAD, HELICAL COIL
    MIL HDBK 60 : 0 THREADED FASTENERS - TIGHTENING TO PROPER TENSION
    MIL H 85800 : 0 HOSE ASSEMBLIES, POLYTETRAFLUOROETHYLENE, ARAMID FIBER REINFORCED, 5000 & 8000 PSI, GENERAL SPECIFICATION FOR
    MIL F 85720 : 0 FITTING, TUBE, FLUID SYSTEMS, SEPARABLE, HIGH PRESSURE, DYNAMIC BEAM, SEAL, GENERAL SPECIFICATION FOR
    SAE AS 4444 : 2013 FITTINGS, 24 DEGREE CONE FLARELESS, FLUID CONNECTION, 5000 PSI
    MIL B 85667/13 : 0 BOLT, 100 DEGREES TENSION FLUSH HEAD, STRAIGHT SHANK, ALUMINUM ALLOY SLEEVE, TITANIUM ALLOY PIN, 95 KSI FSU, 160 KSI FTU
    NASM 21209 : 2003 INSERT, SCREW THREAD, COARSE AND FINE, SCREW LOCKING, HELICAL COIL, CRES
    MIL B 8948 : A BEARINGS, PLAIN, ROD END, TFE LINED, SELF-ALIGNING
    MIL S 7742 : D SCREW THREADS, STANDARD, OPTIMUM SELECTED SERIES, GENERAL SPECIFICATION FOR
    NASA KSC F 124 : 1994 SPECIFICATION FOR FITTINGS, FLARED TUBE
    NASM 21042 : 0 NUT, SELF-LOCKING, 450 DEGREES F, REDUCED HEXAGON, REDUCED HEIGHT, RING BASE, NON-CORROSION RESISTANT STEEL
    MIL A 83577 : B ASSEMBLIES, MOVING MECHANICAL, FOR SPACE AND LAUNCH VEHICLES, GENERAL SPECIFICATION FOR
    MIL N 25161 : C NOZZLE, AERIAL PRESSURE REFUELING, TYPE MA-2
    BS EN 6113 : 2015 AEROSPACE SERIES - CIRCUIT BREAKER, CONNECTING AND ATTACHMENT HARDWARE
    MS 9688 : A BOLT MACHINE HEXAGON HEAD DRILLED 1 HOLE PD SHANK STEEL AMS 6304 DIFFUSED NICKEL CADMIUM PLATE .375-24 UNJF3A
    SAE AMS 7482 : 1995 STUDS - STEEL, CORROSION AND HEAT RESISTANT,ROLL THREADED AFTER HEAT TREATMENT, 1800F (980 C) SOL HEAT TREATED
    MIL C 7413 : B COUPLING, QUICK DISCONNECT, AUTOMATIC SHUTOFF, GENERAL SPECIFICATION FOR
    MIL I 45934 : 0 INSERT, SCREW THREAD, KEYRING LOCKED, SELF LOCKING AND NON SELF LOCKING, 125, 180, AND 220 KSI FTU: GENERAL SPECIFICATION FOR
    NASM 21043 : 2003 NUT, SELF-LOCKING, 800 DEGREES F, REDUCED HEXAGON, REDUCED HEIGHT, RING BASE, CRES
    MIL S 007742 : C SCREW THREADS, STANDARD, OPTIMUM SELECTED SERIES: GENERAL SPECIFICATION FOR
    MIL R 23761 : B REGULATORS, VOLTAGE, AND CONTROL PANELS AIRCRAFT DIRECT CURRENT GENERATOR, GENERAL SPECIFICATION FOR
    MIL V 8610 : B VALVE, FUEL SHUTOFF SOLENOID OPERATED, 28 VOLT, DC
    MIL V 29592 : 0 VALVE, AIR VENT, AUTOMATIC, HYDRAULIC, LOW PRESSURE TYPE II SYSTEMS, GENERAL SPECIFICATION FOR
    MIL T 6396 : E TANKS, AIRCRAFT PROPULSION FLUID SYSTEM, INTERNAL REMOVABLE, NON-SELF-SEALING
    MIL F 27272 : B FITTING, TETRAFLUOROETHYLENE HOSE, HIGH TEMPERATURE, MEDIUM PRESSURE, GENERAL REQUIREMENTS FOR
    JSGS 87231 : A ENGINES, AIRCRAFT, TURBINE
    MIL F 83296 : 0 FITTING, TETRAFLUOROETHYLENE HOSE, HIGH TEMPERATURE, HIGH PRESSURE (3,000 PSI HYDRAULIC AND PNEUMATIC)
    MIL P 87210 : 0 PNEUMATIC POWER SYSTEMS, HIGH PRESSURE
    SAE AS 1349 : 2018 INSERT, SCREW THREAD, HELICAL COIL, LOCKING (LOW FRICTION SYSTEMS), PERFORMANCE STANDARD FOR
    MIL PRF 25676 : E ADAPTER, PRESSURE LUBRICATING OIL SERVICING, AIRCRAFT
    MIL B 6039 : E BEARING, DOUBLE ROW, BALL, SEALED ROD END, ANTI FRICTION, SELF ALIGNING
    MIL P 85315 : 0 PUMP, EJECTOR, AIR VEHICLE FUEL, GENERAL SPECIFICATION FOR
    SAE AS 1960 : 2013 COUPLING ASSEMBLY, V-BAND, SHEET METAL FLANGE, PNEUMATIC TUBE
    13/30285939 DC : 0 BS EN 6113 - AEROSPACE SERIES - CIRCUIT BREAKER, CONNECTING AND ATTACHMENT HARDWARE
    DOD E 8983 : C ELECTRONIC EQUIPMENT, AEROSPACE, EXTENDED SPACE ENVIRONMENT, GENERAL SPECIFICATION FOR
    MIL B 85667/10 : 0 BOLT, SLEEVE, 100 DEGREES TENSION FLUSH HEAD, STRAIGHT SHANK, CRES 304 SLEEVE, CRES A-286 PIN, 160 KSI FTU, 450 DEGREES F
    MIL N 85615/8 : 0 NUT, SELF-SEALING, SELF-LOCKING, ALLOY STEEL, 125 KSI FTU, 250 DEGREES F & 450 DEGREES F
    NASM 21056 : 0 NUT, SELF-LOCKING, PLATE, CORNER, LOW HEIGHT, CRES, 125 KSI FTU, 450 DEGREES F & 800 DEGREES F
    MIL H 26626 : D HOSE ASSEMBLY, TETRAFLUOROETHYLENE, OXYGEN
    MIL E 85583 : A ELECTRIC POWER GENERATING CHANNEL, VARIABLE INPUT SPEED, ALTERNATING CURRENT, 400 HZ, AIRCRAFT, GENERAL SPECIFICATION FOR
    MIL N 85729 : 0 NUT, SELF-LOCKING, A-286, 160 KSI FTU, 450 DEGREES F, GENERAL SPECIFICATION FOR
    MIL E 24021 : J NOTICE 1 ELECTRIC POWER MONITORS, EXTERNAL, AIRCRAFT
    MIL P 23470 : C PIN-RIVET, THREADED AND COLLAR, PIN-RIVET, THREADED, TORQUE CONTROLLED, PRE-STRESS, SELF-LOCKING, GENERAL SPECIFICATION FOR
    MIL V 7899 : C VALVE, CHECK, AIRCRAFT FUEL SYSTEM
    MIL B 85598 : 0 BEARINGS, ELASTOMERIC GENERAL SPECIFICATION FOR
    MIL STD 7080 : 0 SELECTION & INSTALLATION OF AIRCRAFT ELECTRIC EQUIPMENT
    MIL B 85667/6 : A BOLT, SLEEVE, 100 DEGREES REDUCED FLUSH HEAD, STRAIGHT SHANK, CRES 304 SLEEVE, NICKEL ALLOY 718 PIN, 125 KSI FSU, 450 DEGREES F
    MIL T 38473 : A TIMER, PRECISION, BOMBING, 0 - 30 MINUTES
    MIL F 85421 : B FITTINGS, TUBE, FLUID SYSTEMS, SEPARABLE, BEAM SEAM, 3000/4000 PSI - GENERAL SPECIFICATION FOR
    MIL C 27536 : B COUPLING, CLAMP, GROOVED, V-BAND
    MIL B 3990 : D BEARINGS, ROLLER, NEEDLE, AIRFRAME, ANTIFRICTION, INCH
    MS 9558 : E BOLT, MACHINE DOUBLE HEXAGON EXTENDED WASHER HEAD CORROSION AND HEAT RESISTANT STEEL, .3125-24 UNJF-3A
    MIL DTL 27536 : C COUPLING, CLAMP, GROOVED, V-BAND
    MIL F 5509 : D FITTING, FLARED TUBE, FLUID CONNECTION
    MIL I 45914 : A INSERT, SCREW THREAD - LOCKED IN, KEY LOCKED
    MIL D 8804 : B DE-ICING SYSTEM, PNEUMATIC BOOT, AIRCRAFT, GENERAL SPECIFICATION FOR
    MIL S 25057 : B SCREEN SYSTEM, AIR INLET, AIRCRAFT TURBINE ENGINE, GENERAL SPECIFICATION FOR
    MIL B 81365 : 0 BLEED AIR SYSTEMS, GENERAL SPECIFICATIONS FOR
    SBAC TS 26 : 4 TECHNICAL SPECIFICATION FOR ALL METAL SELF-LOCKING NUTS (UNJ THREADS) 1210 MPA (175,000 LBF/IN[2]) MINIMUM TENSILE STRENGTH AT AMBIENT TEMPERATURE
    MIL N 25027/1 : A NUT, SELF-LOCKING, HEAVY HEX, (NON-METALLIC INSERT) 250 & 450 DEG F, UNJC-3B, 1/4 THROUGH 2-1/2 INCH NOMINAL DIAMETERS, NICKEL-COPPER ALLOY
    NASA MSFC STD 506 : 1988 MATERIALS AND PROCESSES CONTROL
    MIL R 5149 : B ROCKET ENGINE, LIQUID PROPELLANT GENERAL SPECIFICATION FOR
    MIL T 5955 : C TRANSMISSION SYSTEM, VTOL-STOL GENERAL REQUIREMENTS FOR
    NASM 25027 : 0 NUT, SELF-LOCKING, 250 DEGREES F, 450 DEGREES F, AND 800 DEGREES F
    MIL S 38399 : A STARTER, PNEUMATIC, AIRCRAFT ENGINE GENERAL SPECIFICATION FOR
    MIL C 22263 : B COUPLING FUEL LINE, FLEXIBLE, 125 PSI, GENERAL SPECIFICATION FOR
    MIL S 9395 : F SWITCHES, PRESSURE, [ABSOLUTE, GAGE AND DIFFERENTIAL] GENERAL SPECIFICATION FOR
    MIL C 7135 : F COMPRESSOR, PNEUMATIC, 3000 PSI 2 SCFM AERO 2A AERO 2A-1 AERO 2B AND AERO 2B-1
    MIL B 85667 : A BOLT, SLEEVE, STRAIGHT SHANK, PROTRUDING AND FLUSH HEAD GENERAL SPECIFICATION FOR
    SAE AS 1472 : 2013 HOSE ASSEMBLY, LOW PRESSURE, POTABLE WATER
    MIL W 5013 : L WHEEL AND BRAKE ASSEMBLIES - AIRCRAFT, GENERAL SPECIFICATION FOR
    MIL B 85667/9 : 0 BOLT, SLEEVE, PROTRUDING HEAD, STRAIGHT SHANK, CRES 304 SLEEVE, CRES A-286 PIN, 95 KSI FSU, 160 KSI FTU, 450 DEGREES F
    MIL T 83454 : 0 TERMINAL, STUD, BLIND PLATE, FOR ELECTRICAL BONDING AND GROUNDING (NONINSULATED)
    MIL C 38373 : B CAP, FLUID TANK FILLER
    SAE AS 1338 : 2014 AEROSPACE METRIC 60 DEGREES SCREW THREAD PROFILE AND TOLERANCE CLASSES
    DOD E 83578 : A EXPLOSIVE ORDNANCE FOR SPACE VEHICLES, GENERAL SPECIFICATION FOR (METRIC)
    MIL V 81356 : B VALVE, FUEL SYSTEM PRESSURIZATION AND VENT
    MIL B 85667/2 : A BOLT, SLEEVE, 100 DEG. REDUCED FLUSH HEAD, STRAIGHT SHANK, CRES 304 SLEEVE, CRES PH 13-8MO PIN, 125 KSI FSU
    MIL I 45932 : 0 INSERT, SCREW THREAD, THIN WALL, LOCK IN
    SAE AS 4388 : 2013 HOSE ASSEMBLY PTFE HEAVY DUTY, -65 TO 400 DEGREES F (-55 TO 204 DEGREES C) 8000 PSI (56000 KPA) HYDRAULIC AND PNEUMATIC
    DOD STD 1312/11 : LATEST FASTENER, TEST METHODS METRIC, METHOD 11, TENSION FATIGUE (S/S BY DOD STD 1312-111)
    PREN 6113 : 200P2 AEROSPACE SERIES - CIRCUIT BREAKER, CONNECTING AND ATTACHMENT HARDWARE
    I.S. EN 6113:2015 AEROSPACE SERIES - CIRCUIT BREAKER, CONNECTING AND ATTACHMENT HARDWARE
    SAE AS 1371 : 2015 NUTS, SELF-LOCKING, CORROSION RESISTANT STEEL, HIGH STRENGTH, PREVAILING TORQUE, ALL METAL, 800 DEGREES F (427 DEGREES C) USE, UNJ THREAD FORM
    SAE AS 4098 : 2013 HOSE ASSEMBLY, POLYTETRAFLUOROETHYLENE, HEAVY DUTY, METALLIC REINFORCED, 400 DEGREE F, 5000 PSI HYDRAULIC AND PNEUMATIC
    SAE ARP 1616 : 2017 SELF-SEALING BREAKAWAY VALVES FOR CRASH-RESISTANT AIRCRAFT FUEL AND OIL SYSTEMS
    SAE AS 7481 : 2015 STUDS, STEEL, UNS S66286 AGED AFTER ROLL THREADED PROCUREMENT SPECIFICATION FOR
    API 616 REDLINE : 2011 GAS TURBINES FOR THE PETROLEUM, CHEMICAL, AND GAS INDUSTRY SERVICES
    SAE AS 7997A : 1999(S2018) MOTORS, AIRCRAFT HYDRAULIC, CONSTANT DISPLACEMENT - GENERAL SPECIFICATION FOR
    API 616 : 2011 GAS TURBINES FOR THE PETROLEUM, CHEMICAL, AND GAS INDUSTRY SERVICES
    SAE AS 82 : 2018 SCREW THREAD FORM, AMERICAN NATIONAL, MODIFIED (NATIONAL ROUND - NR)
    SAE MA 2079 : 2015 HOSE ASSEMBLY, CONVOLUTED POLYTETRAFLUOROETHYLENE, HIGH TEMPERATURE, MEDIUM PRESSURE, AIRCRAFT, METRIC
    SBAC TS 149 : 2 TECHNICAL SPECIFICATION FOR ALL METAL SELF LOCKING NUTS (UNJ THREADS), 1550 MPA (225,000 LBF/IN[2]) MINIMUM TENSILE STRENGTH AT AMBIENT TEMPERATURE
    SAE ARP 260 : 2012 (S2018) CONTROL LEVER CONNECTIONS (60 DEGREES V SERRATIONS)
    SAE AS 4726 : 2017 NUTS, SELF-LOCKING, UNS S66286 CLASSIFICATION: 220 KSI/850 DEGREE F PROCUREMENT SPECIFICATION
    NASM 7838 : 2004 BOLT, INTERNAL WRENCHING, 160 KSI FTU
    NASM 21076 : 2003 NUT, SELF-LOCKING, PLATE, TWO LUG, FLOATING, REDUCED RIVET SPACING, LOW HEIGHT, CRES, 125 KSI FTU, 450 DEGREES F AND 800 DEGREES F
    NASM 21045 : 2004 NUT, SELF-LOCKING, HEXAGON, REGULAR HEIGHT, 450 DEGREES F, 125 KSIFTU
    SAE AS 8025 : 2016 PASSENGER OXYGEN MASK
    SAE AS 4897 : 1994 HOSE ASSEMBLY, POLYTETRAFLUOROETHYLENE (PTFE), LOW PRESSURE, 450 DEGREES F AND FIREPROOF, PROCUREMENT SPECIFICATION FOR
    NASA MSFC STD 2594 : 2002 MSFC FASTENER MANAGEMENT & CONTROL PRACTICES
    MIL S 5944 : C SLING, AIRCRAFT, GENERAL SPECIFICATION FOR
    MIL F 8615 : D FUEL SYSTEM COMPONENTS, GENERAL SPECIFICATION FOR [ASG]
    MIL DTL 18240 : F FASTENER ELEMENT, SELF-LOCKING, THREADED FASTENER, 250 DEGREES F MAXIMUM
    MS 33537 : E INSERT, SCREW THREAD, HELICAL COIL, COARSE AND FINE THREAD, STANDARD DIMENSIONS FOR
    EN 6113 : 2015 AEROSPACE SERIES - CIRCUIT BREAKER, CONNECTING AND ATTACHMENT HARDWARE

    Standards Referencing This Book - (Show below) - (Hide below)

    FED STD H28/4 : 0 SCREW THREAD STANDARDS FOR FEDERAL SERVICES, SECTION 4, CONTROLLED RADIUS ROOD SCREW THREADS, UNJ SYMBOL
    FED STD H28/1 : A SCREW THREAD STANDARDS FOR FEDERAL SERVICES, SECTION 1, NOMENCLATURE, DEFINITIONS AND LETTER SYMBOLS FOR SCREW THREADS
    ASME B1.3M : 1992 SCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY - INCH AND METRIC SCREW THREADS (UN, UNR, UNJ, M AND MJ)
    ASME B46.1 : 2009 SURFACE TEXTURE (SURFACE ROUGHNESS, WAVINESS, AND LAY)
    FED STD H28/2 : B SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 2 UNIFIED INCH SCREW THREADS- UN AND UNR THREAD FORMS
    FED STD H28/20 : B SCREW THREAD STANDARDS FOR FEDERAL SERVICES, SECTION 20, INSPECTION METHODS FOR ACCEPTABILITY OF UN, UNR, UNJ, M, AND MJ SCREW THREADS
    FED STD H28/6 : A SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 6 GAGES AND GAGING FOR UNIFIED SCREW THREADS-UN AND UNR THREAD FORMS
    ASME B1.7M : 1984 SCREW THREADS - NOMENCLATURE, DEFINITIONS, AND LETTER SYMBOLS FOR SCREW THREADS
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