• FED STD H28/20 : B

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    SCREW THREAD STANDARDS FOR FEDERAL SERVICES, SECTION 20, INSPECTION METHODS FOR ACCEPTABILITY OF UN, UNR, UNJ, M, AND MJ SCREW THREADS

    Available format(s):  Hardcopy, PDF

    Language(s): 

    Published date: 

    Publisher:  US Military Specs/Standards/Handbooks

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

    1 Scope
    2 Referenced documents
    3 Definitions
    4 General requirements
    5 Detailed requirements
    5.1 Inspection methods and their selection
    5.1.1 Established systems
    5.1.2 Selection
    5.1.3 System 21
    5.1.4 System 22
    5.1.5 System 23
    5.1.6 Small lot and nonstandard size part considerations
    5.2 Acceptability
    5.3 Special inspection considerations
    5.4 In-process controls
    5.5 Designation of inspection method
    5.6 Referee gaging
    5.7 Indicating gages and measuring instruments -
          special requirements
    5.8 Workmanship requirements for gages
    5.9 Calibration and inspection of gages and measuring
          instruments
    Table
    XX.1 Calibration requirements and standards, external
          product thread gages
    XX.2 Calibration requirements and standards, internal
          product thread gages
    XX.3 Calibration requirements, setting gages

    Abstract - (Show below) - (Hide below)

    Inspection methods for inch and metric module (UN, UNR, UNJ, M and MJ) screw threads. May also be referenced for Class 5 interference fit threads.

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

    Committee FSC THDS
    Development Note B Notice 1 - Notice of Change (02/2004)
    Document Type Standard
    Product Note NEW CHILD NOT 1 2019 NOW ADDED
    Publisher US Military Specs/Standards/Handbooks
    Status Current

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

    DOD I 63274 : A INSERT, SCREW THREAD THIN WALL, LOCKED IN, METRIC, GENERAL SPECIFICATION FOR
    DOD I 63276 : A INSERT, SCREW THREAD, LOCKED IN, RING LOCKED, SERRATED, METRIC AND RING LOCK SERRATED METRIC
    FED STD H28 : A SCREW THREAD STANDARDS FOR FEDERAL SERVICES
    SAE AS 4723 : 2012 INSERT, SCREW THREAD, SELF-LOCKING, UNS S66286, KEY LOCKED, PLASTIC SELF LOCKING DEVICE, SOLID FILM LUBRICANT, PROCUREMENT SPECIFICATION FOR
    DOD S 63275 : A STUD, SCREW THREAD, LOCKED IN, RING LOCKED, SERRATED, METRIC AND RING LOCK SERRATED METRIC, GENERAL SPECIFICATION FOR
    MIL B 45912 : A BOLT, SELF-LOCKING, HEXAGON HEAD, STEEL
    SAE AS 5887 : 2014 INSERT, SCREW THREAD, SELF-LOCKING, UNS S66286, LOCKED IN, KEY LOCKED PROCUREMENT SPECIFICATION FOR
    MIL S 7742 : D SCREW THREADS, STANDARD, OPTIMUM SELECTED SERIES, GENERAL SPECIFICATION FOR
    NASM 35649 : 2002 NUT, PLAIN, HEXAGON, MACHINE SCREW UNC-2B
    SAE AS 8879 : 2012 SCREW THREADS - UNJ PROFILE, INCH CONTROLLED RADIUS ROOT WITH INCREASED MINOR DIAMETER
    SAE AS 4891 : 1999 STUD, LOCKED IN, KEY LOCKED, UNS S66286, CLASSIFICATION: 140 KSI PROCUREMENT SPECIFICATION FOR
    SAE AS 4892 : 2012 INSERT, SCREW THREAD, SELF-LOCKING, UNS S66286, LOCKED IN, KEY LOCKED, PROCUREMENT SPECIFICATION FOR
    NASM 24693 : 0 SCREW, MACHINE, FLAT COUNTERSUNK HEAD, 100 DEGREES, CROSS RECESSED, UNC-2A AND UNF-2A
    MIL S 007742 : C SCREW THREADS, STANDARD, OPTIMUM SELECTED SERIES: GENERAL SPECIFICATION FOR
    MIL DTL 10884 : H FASTENERS, SNAP
    NASM 35308 : 0 SCREW, CAP, HEXAGON HEAD (FINISHED HEXAGON BOLT), STEEL, CORROSION RESISTING, PASSIVATED, UNF-2A
    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
    FED STD H28/2 : B SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 2 UNIFIED INCH SCREW THREADS- UN AND UNR THREAD FORMS
    DOD N 70333 : 0 NUT, PLAIN AND SELF-LOCKING, CLINCH, METRIC (SELF-CLINCHING, KNURLED COLLAR) FIXED AND FLOATING, GENERAL SPECIFICATION FOR
    MIL F 10884 : G FASTENERS, SNAP
    MIL I 45914 : A INSERT, SCREW THREAD - LOCKED IN, KEY LOCKED
    FED STD H28/18 : B SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 18 PHOTOGRAPHIC EQUIPMENT THREADS
    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
    FF N 836 : E NUT, SQUARE, HEXAGON, CAP, SLOTTED, CASTLE, KNURLED, WELDING AND SINGLE BALL SEAT
    FED STD H28/23 : 0 SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 23 CLASS 5 INTERFERENCE-FIT SCREW THREADS
    MIL DTL 45912 : B BOLT, SELF-LOCKING, HEXAGON HEAD, STEEL
    SAE AS 4976 : 2012 Insert, Screw Thread, Non-Locking, UNS S66286, Locked in, Key Locked, Procurement Specification for(STABILIZED Mar 2019)
    MIL S 70335 : A SCREW THREADS, INTERNAL COLD FORMED, GENERAL SPECIFICATION FOR
    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
    FED STD H28/22 : A SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 22 GAGES AND GAGING FOR METRIC SCREW THREADS-M AND MJ THREAD FORMS
    SAE AS 45909 : 2015 STUD, LOCKED IN, RING LOCKED, SERRATED, GENERAL SPECIFICATION FOR
    NASM 35206 : 2004 SCREW, MACHINE, PAN HEAD, CRUCIFORM RECESS, CARBON STEEL, UNC-2A
    NASM 51959 : 0 SCREW, MACHINE, FLAT COUNTERSUNK HEAD, 82 DEGREES, CRUCIFORM RECESS, CORROSION-RESISTANT STEEL, UNC-2A
    FED STD H28/21 : B SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 21 METRIC SCREW-THREADS
    MS 24693 : K SCREW, MACHINE, FLAT COUNTERSUNK HEAD, 100 DEG, CROSS RECESSED, UNC-2A AND UNF-2A (IN./MM)
    MIL-DTL-45910 D : 2015 INSERT, SCREW THREAD-LOCKED IN AND RING LOCKED, SERRATED GENERAL SPECIFICATION FOR

    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
    FED STD H28/22 : A SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 22 GAGES AND GAGING FOR METRIC SCREW THREADS-M AND MJ THREAD FORMS
    ASME B1.3M : 1992 SCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY - INCH AND METRIC SCREW THREADS (UN, UNR, UNJ, M AND MJ)
    GGG C 105 : C CALIPER, MICROMETER (INSIDE, OUTSIDE, TUBE) AND GAGE, DEPTH, MICROMETER
    ASME B1.18M : 82(R1987) METRIC SCREW THREADS FOR COMMERCIAL MECHANICAL FASTENERS - BOUNDARY PROFILE DEFINED,
    MIL STD 120 : 0 GAGE INSPECTION
    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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