• FED STD H28/2 : B

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    SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 2 UNIFIED INCH SCREW THREADS- UN AND UNR THREAD FORMS

    Available format(s):  Hardcopy, PDF

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    Publisher:  US Military Specs/Standards/Handbooks

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    Abstract - (Show below) - (Hide below)

    Specifies unified UN and UNR inch screw threads. Coverage includes: preferred non standard diameters; diameter pitch combinations; thread class selection; thread allowance and tolerance; completely formed threads; incomplete formed threads; gages and gaging; preferred non standard diameters. Also contains detailed tables and diagrams.

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    Committee AREA THDS
    Development Note Supersedes FED STD H28/3. B NOTICE 1 - Notice of Validation. (10/2001) B NOTICE 2 - Notice of Validation. (11/2006)
    Document Type Standard
    Product Note NEW CHILD NOT 3 2019 IS NOW ADDED.<br>
    Publisher US Military Specs/Standards/Handbooks
    Status Current
    Supersedes

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

    MIL S 81963 : B SERVO-COMPONENT, PRECISION INSTRUMENT, ROTATING, COMMON REQUIREMENTS AND TESTS, GENERAL SPECIFICATION FOR
    MIL DTL 24646 : C FUSE BOXES, GENERAL SPECIFICATION FOR
    MIL DTL 2726 : C RECEPTACLE, RECEPTACLE PLUGS, SWITCH AND RECEPTACLES, AND OUTLETS (ELECTRICAL), GENERAL SPECIFICATION FOR
    MIL V 24740 : 0 VALVE, SAFETY, BOILER, REMOTE PILOT OPERATED, FOR SHIPBOARD USE
    FF S 210 : B SETSCREWS, SQUARE HEAD (INCH) AND SLOTTED HEADLESS (INCH AND METRIC)
    MS 9196 : C TEE, TUBE - SAE-AMS5646, BOSS
    FED STD H28 : A SCREW THREAD STANDARDS FOR FEDERAL SERVICES
    MIL E 24142 : B ENCLOSURE FOR ELECTRICAL FITTINGS AND FIXTURES, GENERAL SPECIFICATION FOR
    MS 39207 : H ELBOWS, TUBE - SAFETY SLEEVE COMPRESSION TYPE, 90 DEGREE
    NASM 8846 : 0 INSERT, SCREW-THREAD, HELICAL COIL
    SAE AS 4891 : 1999 STUD, LOCKED IN, KEY LOCKED, UNS S66286, CLASSIFICATION: 140 KSI PROCUREMENT SPECIFICATION FOR
    MIL B 45912 : A BOLT, SELF-LOCKING, HEXAGON HEAD, STEEL
    MIL H 13444 : E HOSE & HOSE ASSEMBLIES, RUBBER: FUEL AND OIL
    DOD B 24541 : A BATTERY CELLS AND ELEMENTS, LEAD-ACID, MAIN STORAGE, SUBMARINE; GENERAL SPECIFICATION FOR (METRIC)
    MIL S 7742 : D SCREW THREADS, STANDARD, OPTIMUM SELECTED SERIES, GENERAL SPECIFICATION FOR
    NASA SSTD 8070 0098 : 2012 MACHINE SHOP TOLERANCES
    NASM 35649 : 2002 NUT, PLAIN, HEXAGON, MACHINE SCREW UNC-2B
    MIL DTL 2726/55 : B RECEPTACLE, PLUG, ELECTRICAL, 4-PIN GROUNDED, 10-AMPERE, 450-VOLT, 400 HERTZ, 3-PHASE (SYMBOL NO. 1260)
    MIL DTL 2726/2 : C RECEPTACLE, PLUG, ELECTRICAL, 3 - PIN GROUNDED, 50 - AMPERE, 250 - VOLT, DIRECT CURRENT (SYMBOL NO. 716.1)
    MIL G 25507 : B GAGE, PRESSURE, DIAL INDICATING, OXYGEN 0-2000 PSI
    SAE AS 5356 : 2017 COUPLING, FUEL LINE, FLEXIBLE, 125 PSI GENERAL SPECIFICATION FOR
    MIL C 24224 : B CARTRIDGE, GAS PRESSURE, FOR PRESSURIZING DRY CHEMICAL FIRE EXTINGUISHERS
    13/30285934 DC : 0 BS EN 3545-005 - AEROSPACE SERIES - CONNECTORS, ELECTRICAL, RECTANGULAR, WITH SEALED AND NON-SEALED REAR, PLASTIC HOUSING, LOCKING DEVICE, OPERATING TEMPERATURES -55 DEGREES C TO 175 DEGREES C - PART 005: MALE CODING AND ATTACHMENT SYSTEM FOR MOUNTING ON FREE HOUSING (PLUG) - PRODUCT STANDARD
    MIL E 17807 : C ELEVATOR, WEAPON AND CARGO, ELECTROMECHANICAL (SHIPBOARD)
    MIL PRF 19207 : G FUSEHOLDERS, EXTRACTOR POST TYPE, BLOWN FUSE, INDICATING AND NONINDICATING, GENERAL SPECIFICATION FOR
    SAE AS 4892 : 2012 INSERT, SCREW THREAD, SELF-LOCKING, UNS S66286, LOCKED IN, KEY LOCKED, PROCUREMENT SPECIFICATION FOR
    MIL DTL 24558 : B TERMINAL BOXES, CONNECTION, FOR ELECTRICAL AND ELECTRONIC SYSTEMS, GENERAL SPECIFICATION FOR
    MIL S 007742 : C SCREW THREADS, STANDARD, OPTIMUM SELECTED SERIES: GENERAL SPECIFICATION FOR
    MIL H 13531 : C HOSE, RUBBER AND HOSE ASSEMBLY, RUBBER (HYDRAULIC, FLEXIBLE)
    MIL DTL 8348 : K GAGE ASSEMBLIES, AIR PRESSURE, DIAL INDICATING CHUCK TYPE, SELF-CONTAINED
    MS 39135 : G NUT, HOSE COUPLING, AUTOMOTIVE AIR BRAKE HOSE ADAPTER
    MIL R 22368 : D REPAIR KIT AND REPAIR KIT COMPONENTS, FOR COLLAPSIBLE FABRIC TANKS AND BOATS
    MIL B 18558 : B BEARING, PROPULSION LINE SHAFT, OIL DISC LUBRICATED
    XP PREN 3545-006 : 1997 XP AEROSPACE SERIES - CONNECTORS, ELECTRICAL, RECTANGULAR, WITH SEALED AND NON-SEALED REAR, PLASTIC HOUSING, LOCKING DEVICE, OPERATING TEMPERATURES -55 DEGREE C TO 175 DEGREE C - PART 006: MALE CODING AND ATTACHMENT SYSTEM FOR MOUNTING ON FIXED HOUSING (RECEPTACLE) - PRODUCT STANDARD
    MIL M 2082 : C METERS, FLOW, MECHANICAL, VOLUMETRIC POSITIVE DISPLACEMENT, LIQUID, COLD WATER AND HOT WATER TYPE, NAVAL SHIPBOARD USE
    MIL P 45377 : A POWER SUPPLY. HIGH VOLTAGE, 24 VOLT DIRECT CURRENT
    NASM 24693 : 0 SCREW, MACHINE, FLAT COUNTERSUNK HEAD, 100 DEGREES, CROSS RECESSED, UNC-2A AND UNF-2A
    MIL DTL 10884 : H FASTENERS, SNAP
    NASM 51958 : 0 SCREW, MACHINE, PAN HEAD, CRUCIFORM RECESS, CORROSION RESISTING STEEL, UNF-2A
    MIL C 24368 : B CONNECTOR ASSEMBLIES, PLUGS AND RECEPTACLES, ELECTRIC POWER TRANSFER, SHORE TO SHIP AND SHIP TO SHIP, GENERAL SPECIFICATION FOR
    FED STD H28/17 : A SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 17 SURVEYING INSTRUMENT MOUNTING THREADS
    MIL S 8879 : C SCREW THREADS, CONTROLLED RADIUS ROOT WITH INCREASED MINOR DIAMETER, GENERAL SPECIFICATION FOR
    SAE AS 4976 : 2012 Insert, Screw Thread, Non-Locking, UNS S66286, Locked in, Key Locked, Procurement Specification for(STABILIZED Mar 2019)
    MIL S 1222 : H STUD, BOLTS, HEX CAP SCREWS, SOCKET HEAD CAP SCREWS AND NUTS
    MIL DTL 24552 : B TERMINALS AND SEALS, PLUGS AND SWITCH, CASUALTY POWER SYSTEMS, RECEPTACLE TYPE, GENERAL SPECIFICATION FOR
    MIL T 14091 : E TRIPOD, SURVEYING, EXTENSION-LEG-TYPE
    MIL H 21367 : E HULL FITTINGS: CONNECTORS, ADAPTER, END SEALS, AND STUFFING TUBES FOR FLEXIBLE, SOLID-DIELECTRIC, RADIO-FREQUENCY CABLES
    MIL DTL 2726/6 : C RECEPTACLE, PLUG, ELECTRICAL, 3 - PIN GROUNDED, 40 - AMPERE, 125 - VOLT, ALTERNATING CURRENT (SYMBOL NO. 1143.1)
    MIL E 2036 : D ENCLOSURE FOR ELECTRIC AND ELECTRONIC EQUIPMENT, NAVAL SHIPBOARD
    MIL P 62071 : B POWER SUPPLY, HIGH VOLTAGE, SOLID STATE, 24 VOLTS, DIRECT CURRENT
    MIL E 24715 : 0 EXTINGUISHERS, FIRE. VAPORIZING LIQUID (BROMOCHLORODIFLUOROMETHANE, HALON 1211)
    FF N 845 : D NUT, PLAIN, WING, INCH AND METRIC
    MS 51531 : B NUT, TUBE COUPLING, 37 DEGREE FLARED
    MIL F 19700 : A FASTENERS, SCREW THREADED, AND RELATED ITEMS, NON-MAGNETIC
    MIL DTL 32408 : 0 INTEGRAL MOTOR PUMP (IMP)
    MIL S 15743 : C SWITCH, ROTARY, ENCLOSED
    MIL T 24270 : B THERMOWELLS FOR THERMOMETERS AND ELECTRICAL TEMPERATURE SENSORS GENERAL SPECIFICATION FOR
    MIL DTL 2726/1 : C RECEPTACLE, PLUG, ELECTRICAL, 2 - PIN, 40 - AMPERE, 125 - VOLT, DIRECT CURRENT (SYMBOL NO. 715.1)
    MIL DTL 2726/53 : B RECEPTACLE, PLUG, ELECTRICAL, 4-PIN GROUNDED, 10-AMPERE, 450-VOLT, 60-HERTZ, 3-PHASE (SYMBOL NO. 1258)
    MIL A 55059 : D ADAPTER, BATTERY TERMINAL
    MIL C 11071 : D CLEANING MACHINE, FUEL CAN, DRUM
    MIL F 10884 : G FASTENERS, SNAP
    MIL DTL 9415 : B DYNAMIC LOUDSPEAKER LS-184A/AIC-10
    MIL I 45914 : A INSERT, SCREW THREAD - LOCKED IN, KEY LOCKED
    MIL V 2961 : D VALVES, GLOBE, PRESSURE REDUCING, GAS SERVICE
    FED STD H28/18 : B SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 18 PHOTOGRAPHIC EQUIPMENT THREADS
    DOD M 24672 : 0 MOLDS, AND MOLD HEATING PLATEN FOR MOLDING ELECTRICAL CONNECTORS AND CABLES (METRIC)
    DOD B 15072 : E BATTERIES, STORAGE, LEAD-ACID, PORTABLE
    MIL DTL 2 : G VALVES, CYLINDER, GAS (FOR COMPRESSED OR LIQUEFIED GASES), GENERAL SPECIFICATION FOR
    MIL T 24552 : A TERMINALS AND PLUGS, CASUALTY POWER SYSTEMS, RECEPTACLE TYPE, GENERAL SPECIFICATION FOR
    MIL V 24272 : B VALVE, MANIFOLD, HIGH PRESSURE GAS REDUCING
    MIL DTL 24705 : B PENETRATORS, MULTIPLE CABLE, ELECTRIC CABLE, GENERAL SPECIFICATION FOR
    MIL R 52255 : D REPAIR KIT AND REPAIR KIT COMPONENTS, FOR COLLAPSIBLE FABRIC TANKS, DRUMS, AND BOATS
    MIL F 1224 : D FITTINGS, TUBE, BRASS OR BRONZE, 45 DEGREE FLARED
    MS 9194 : C ELBOW, TUBE - SAE-AMS5646, BOSS, 90 DEGREES
    MIL DTL 24231 : E CONNECTORS, PLUGS, RECEPTACLES, ADAPTERS, HULL INSERTS, AND HULL INSERT PLUGS, PRESSURE-PROOF, GENERAL SPECIFICATION FOR
    MIL DTL 2726/52 : B RECEPTACLE, PLUG, ELECTRICAL, 3-PIN GROUNDED, 10-AMPERE, 450-VOLT, 60-HERTZ, SINGLE PHASE (SYMBOL NO. 1257)
    WW T 696 : E TRAPS, STEAM
    MIL R 24169 : B REGULATOR, AIR DEMAND, SINGLE HOSE, DIVER 5
    MIL DTL 2726/3 : E RECEPTACLE, PLUG, ELECTRICAL, 4-PIN GROUNDED, 40-AMPERE, 450-VOLT, ALTERNATING CURRENT, 60-HERTZ (SYMBOL NO. 717.1)
    MS 9195 : B ELBOW, TUBE - SAE-AMS5639, BOSS, 45 DEGREES
    MS 39021 : F SPEEDOMETER MECHANICAL (0-60MPH)
    MIL DTL 38999 : M CONNECTORS, ELECTRICAL, CIRCULAR, MINIATURE, HIGH DENSITY, QUICK DISCONNECT (BAYONET, THREADED OR BREECH COUPLING), ENVIRONMENT RESISTANT WITH CRIMP REMOVABLE CONTACTS OR HERMETICALLY SEALED WITH FIXED, SOLDERABLE CONTACTS, GENERAL SPECIFICATION FOR
    MS 39137 : H ADAPTER BODY, AUTOMOTIVE AIR BRAKE
    MS 51532 : B FITTING, HYDRAULIC TUBE, FLARED 37 DEGREE AND FLARELESS, STEEL; CAP, TUBE, 37 DEGREE FLARED
    MIL DTL 81963 : C SERVOCOMPONENTS, PRECISION INSTRUMENT, ROTATING, COMMON REQUIREMENTS AND TESTS, GENERAL SPECIFICATION FOR
    MIL DTL 45912 : B BOLT, SELF-LOCKING, HEXAGON HEAD, STEEL
    MS 9193 : A NIPPLE, TUBE - SAE-AMS5639, BOSS
    MIL S 70335 : A SCREW THREADS, INTERNAL COLD FORMED, GENERAL SPECIFICATION FOR
    MIL P 24705 : A PENETRATORS, MULTIPLE CABLE, FOR ELECTRICAL CABLES, GENERAL SPECIFICATION FOR
    MIL-DTL-17840D:2018 PUMPS, CENTRIFUGAL, CLOSE-COUPLED, NAVY STANDARD (FOR SURFACE SHIP APPLICATION)
    MIL DTL 2036 : E ENCLOSURES FOR ELECTRIC AND ELECTRONIC EQUIPMENT, NAVAL SHIPBOARD
    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
    A A 55606 : A ANCHOR, GUY, AND RODS, ANCHOR
    MIL G 15214 : E GAGE, DEPTH, WRIST, DIVER'S, SELF LUMINOUS DIAL
    MIL DTL 81722 : B VALVE, INFLATION, LIFE RAFT, FLU-6/P
    FF N 836 : E NUT, SQUARE, HEXAGON, CAP, SLOTTED, CASTLE, KNURLED, WELDING AND SINGLE BALL SEAT
    MIL H 13719 : D HOSE ASSEMBLY, RUBBER, HYDRAULIC BRAKE
    XP PREN 3545-005 : 1997 XP AEROSPACE SERIES - CONNECTORS, ELECTRICAL, RECTANGULAR, WITH SEALED AND NON-SEALED REAR, PLASTIC HOUSING, LOCKING DEVICE, OPERATING TEMPERATURES -55 DEGREE C TO 175 DEGREE C - PART 005: FEMALE CODING AND ATTACHMENT SYSTEM FOR MOUNTING ON FREE HOUSING (PLUG) - PRODUCT STANDARD
    MIL DTL 2726/5 : C RECEPTACLE, PLUG, ELECTRICAL, 3-PIN GROUNDED, 40 - AMPERE, 450 - VOLT, ALTERNATING CURRENT (SYMBOL NO. 1140.1)
    MIL PRF 83419 : F ALTIMETER, SERVO CONTROLLED, AUTOMATIC PRESSURE STANDBY
    SAE AS 4723 : 2012 INSERT, SCREW THREAD, SELF-LOCKING, UNS S66286, KEY LOCKED, PLASTIC SELF LOCKING DEVICE, SOLID FILM LUBRICANT, PROCUREMENT SPECIFICATION FOR
    MS 9095 : B NIPPLE, TUBE - ALUMINUM, BOSS
    MIL T 24558 : 0 TERMINAL BOXES, CONNECTION, FOR ELECTRICAL AND ELECTRONIC SYSTEMS, GENERAL SPECIFICATION FOR
    NASM 35308 : 0 SCREW, CAP, HEXAGON HEAD (FINISHED HEXAGON BOLT), STEEL, CORROSION RESISTING, PASSIVATED, UNF-2A
    PREN 3545-006 : 200P2 AEROSPACE SERIES - CONNECTORS, ELECTRICAL, RECTANGULAR, WITH SEALED AND NON-SEALED REAR, PLASTIC HOUSING, LOCKING DEVICE, OPERATING TEMPERATURES -55 DEGREES C TO 175 DEGREES C - PART 006: MALE CODING AND ATTACHMENT SYSTEM FOR MOUNTING ON FIXED HOUSING (RECEPTACLE) - PRODUCT STANDARD
    ASME B40.200:2008(R2013) Thermometers, Direct Reading and Remote Reading
    PREN 3545-005 : 200P2 AEROSPACE SERIES - CONNECTORS, ELECTRICAL, RECTANGULAR, WITH SEALED AND NON-SEALED REAR, PLASTIC HOUSING, LOCKING DEVICE, OPERATING TEMPERATURES -55 DEGREES C TO 175 DEGREES C - PART 005: FEMALE CODING AND ATTACHMENT SYSTEM FOR MOUNTING ON FREE HOUSING (PLUG) - PRODUCT STANDARD
    SAE AS 1710 : 2014 COUPLING, FUEL, FLEXIBLE, VARIABLE CAVITY, THREADED TYPE WITH FERRULES
    NASM 35206 : 2004 SCREW, MACHINE, PAN HEAD, CRUCIFORM RECESS, CARBON STEEL, UNC-2A
    SAE AS 45909 : 2015 STUD, LOCKED IN, RING LOCKED, SERRATED, GENERAL SPECIFICATION FOR
    NASM 51959 : 0 SCREW, MACHINE, FLAT COUNTERSUNK HEAD, 82 DEGREES, CRUCIFORM RECESS, CORROSION-RESISTANT STEEL, UNC-2A
    ASME Y14.6:2001 SCREW THREAD REPRESENTATION
    ASME Y14.6 : 2001 : R2007 SCREW THREAD REPRESENTATION
    ASME Y14.6 : 2001 : R2013 SCREW THREAD REPRESENTATION
    ASME B40.200 : 2008 THERMOMETERS, DIRECT READING AND REMOTE READING
    MIL E 16400 : H ELECTRONIC, INTERIOR COMMUNICATIONS AND NAVIGATION EQUIPMENT, NAVAL SHIP AND SHORE, GENERAL SPECIFICATION FOR
    MIL DTL 18240 : F FASTENER ELEMENT, SELF-LOCKING, THREADED FASTENER, 250 DEGREES F MAXIMUM
    BS EN 3545-006 : 2015 AEROSPACE SERIES - CONNECTORS, ELECTRICAL, RECTANGULAR, WITH SEALED AND NON-SEALED REAR, PLASTIC HOUSING, LOCKING DEVICE, OPERATING TEMPERATURES -55 DEGREES C TO 175 DEGREES C - PART 006: MALE CODING AND ATTACHMENT SYSTEM FOR MOUNTING ON FIXED HOUSING (RECEPTACLE) - PRODUCT STANDARD
    FF-S-1362:2014 STUD, PLAIN, GENERAL PURPOSE
    MS 24693 : K SCREW, MACHINE, FLAT COUNTERSUNK HEAD, 100 DEG, CROSS RECESSED, UNC-2A AND UNF-2A (IN./MM)
    MIL DTL 13791 : H DISTRIBUTOR, IGNITION SYSTEM: INTEGRAL COIL, WATERPROOF 24 VOLT
    NASA PRC 9006 : 2007 PROCESS SPECIFICATION FOR THE INSTALLATION OF KEY-RETAINED SCREW THREAD INSERTS
    MIL-DTL-45910 D : 2015 INSERT, SCREW THREAD-LOCKED IN AND RING LOCKED, SERRATED GENERAL SPECIFICATION FOR
    MIL HDBK 454 : B GENERAL GUIDELINES FOR ELECTRONIC EQUIPMENT
    EN 3545-006:2015 AEROSPACE SERIES - CONNECTORS, ELECTRICAL, RECTANGULAR, WITH SEALED AND NON-SEALED REAR, PLASTIC HOUSING, LOCKING DEVICE, OPERATING TEMPERATURES -55 DEGREES C TO 175 DEGREES C - PART 006: MALE CODING AND ATTACHMENT SYSTEM FOR MOUNTING ON FIXED HOUSING (RECEPTACLE) - PRODUCT STANDARD

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

    FED STD H28/1 : A SCREW THREAD STANDARDS FOR FEDERAL SERVICES, SECTION 1, NOMENCLATURE, DEFINITIONS AND LETTER SYMBOLS FOR SCREW THREADS
    ASME B46.1 : 2009 SURFACE TEXTURE (SURFACE ROUGHNESS, WAVINESS, AND LAY)
    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
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