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MIL-S-8879 Revision C:1991

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by

SCREW THREADS, CONTROLLED RADIUS ROOT WITH INCREASED MINOR DIAMETER, GENERAL SPECIFICATION FOR

Available format(s)

PDF

Superseded date

24-02-2003

Superseded by

SAE AS 8879 : 2004

€17.95
Excluding VAT

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

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.

Committee
FSG 53
DevelopmentNote
C Notice 3 - Notice of Cancellation/Superseded by SAE AS 8879. (03/2003)
DocumentType
Standard
Pages
38
PublisherName
US Military Specs/Standards/Handbooks
Status
Superseded
SupersededBy
Supersedes

MIL-N-85615-10 Base Document:1989 Nut, Self-Sealing, Self-Locking, CRES, 160 KSI FTU, 250 Deg. F and 450 Deg. F
NASM8846:2011 INSERT, SCREW-THREAD, HELICAL COIL
NASA MSFC STD 2594 : 2002 MSFC FASTENER MANAGEMENT & CONTROL PRACTICES
MIL-S-5944 Revision C:1990 SLING, AIRCRAFT, GENERAL SPECIFICATION FOR
MIL-A-83577 Revision B:1988 ASSEMBLIES, MOVING MECHANICAL, FOR SPACE AND LAUNCH VEHICLES, GENERAL SPECIFICATION FOR
MIL-V-29592 Base Document:1993 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 Revision A:1995 ENGINES, AIRCRAFT, TURBINE
MIL-B-6039 Revision E:1994 BEARING, DOUBLE ROW, BALL, SEALED ROD END, ANTI FRICTION, SELF ALIGNING
MIL H 26626 : D HOSE ASSEMBLY, TETRAFLUOROETHYLENE, OXYGEN
MIL-STD-7080 Base Document:1994 SELECTION & INSTALLATION OF AIRCRAFT ELECTRIC EQUIPMENT
MIL-B-85667-6 Revision A:1991 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 Revision A:1972 TIMER, PRECISION, BOMBING, 0 - 30 MINUTES
MIL-F-85421 Revision B:1986 FITTINGS, TUBE, FLUID SYSTEMS, SEPARABLE, BEAM SEAM, 3000/4000 PSI - GENERAL SPECIFICATION FOR
MIL C 27536 : B COUPLING, CLAMP, GROOVED, V-BAND
MIL-N-25027-1 Revision A:1995 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
MIL S 9395 : F SWITCHES, PRESSURE, [ABSOLUTE, GAGE AND DIFFERENTIAL] GENERAL SPECIFICATION FOR
MIL-C-7135 Revision F:1967 Compressor, Pneumatic, 3,000 PSI -- 2 SCFM Aero 2A (*), Aero 2A-1 (*), Aero 2B (*), and Aero 2B-1 (*)
MIL-B-85667 Revision A:1991 BOLT, SLEEVE, STRAIGHT SHANK, PROTRUDING AND FLUSH HEAD GENERAL SPECIFICATION FOR
SAE AS1472A Hose Assembly, Low Pressure, Potable Water
SAE AS1338A Aerospace Metric 60° Screw Thread Profile and Tolerance Classes
DOD-E-83578 Revision A:1987 EXPLOSIVE ORDNANCE FOR SPACE VEHICLES, GENERAL SPECIFICATION FOR (METRIC)
MIL-V-81356 Revision B:1992 VALVE, FUEL SYSTEM PRESSURIZATION AND VENT
MIL-B-85667-2 Revision A:1991 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
API 616 REDLINE : 2011 GAS TURBINES FOR THE PETROLEUM, CHEMICAL, AND GAS INDUSTRY SERVICES
SAE AS7997 Motors, Aircraft Hydraulic, Constant Displacement General Specification For
MIL-N-45938 Revision A:1995 NUT, PLAIN, CLINCH AND NUT, SEL-LOCKING, CLINCH GENERAL SPECIFICATION FOR
MIL-B-8907 Revision A:1983 BOLT, ALLOY STEEL, SHEAR AND TENSILE (156 KSI FSU AND 260 KSI FTU, 450 DEGREE F) EXTERNAL WRENCHING, FLANGED HEAD
MIL-B-87114 Revision A:1978 BOLTS, RECESS DRIVE, GENERAL SPECIFICATION FOR
MS 124691 124730 : E INSERT, CRES HELICAL COIL FINE THREAD, 1-1/2 DIA NOMINAL LENGTH
MIL H 25579 : E HOSE ASSEMBLY, TETRAFLUOROETHYLENE, HIGH TEMPERATURE MEDIUM PRESSURE, GENERAL REQUIREMENTS FOR
MS21077 Revision H:1994 NUT, SELF-LOCKING, PLATE, TWO LUG, FLOATING, NON-METALLIC INSERT, STEEL 125 KSI FTU, 250 DEG F
MIL-B-8906 Revision C:1988 BOLT, ALLOY STEEL, SHEAR AND TENSILE, (132 KSI MIN FSU AND 220 KS MIN FTU), 45 DEGREE F, SPLINE DRIVE
MIL-S-45909 Revision C:1989 STUD, LOCKED IN - RING LOCKED SERRATED
MIL-B-23964 Revision D:1981 BOLT, SELF-RETAINING, POSITIVE LOCKING
MIL-N-85353 Base Document:1981 NUTS (FASTENERS) INTERNALLY THREADED, PRELOAD LOCKING 450 DEG F 800 DEG F,1200 DEG F, GENERAL SPECIFICATION FOR
MIL-B-83050 Revision D:1985 BOLT, SELF RETAINING, IMPEDANCE TYPE
MIL BULL 343 : A DOCUMENTS APPLICABLE TO AIRCRAFT ENGINES AND PROPELLERS, USE OF
MIL-S-7839 Revision B:1973 SCREW, STRUCTURAL, AIRCRAFT
MIL-B-7874 Revision B:1982 BOLT, MACHINE 1200 DEGREES F
MIL F 83798 : B FITTING, RUBBER HOSE, LIGHTWEIGHT MEDIUM PRESSURE, GENERAL SPECIFICATION FOR
MS122116THRUMS122155 Revision D:1976 INSERT CRES HELICAL COIL COARSE THREAD 1 1/2 DIA NOMINAL LENGTH
MIL I 45910 : C INSERT, SCREW THREAD LOCKED IN & RING LOCKED 1 SERRATED GENERAL SPECIFICATION FOR
MIL-B-85604 Revision A:1988 BOLT, NICKEL ALLOY 718, TENSION, HIGH STRENGTH, (125 KSI FSU & 220 KSI FTU) HIGH TEMPERATURE, SPLINE DRIVE, GENERAL SPECIFICATION FOR
MIL-T-81364 Base Document:1966 T-BOLT, 180,000 PSI TYPE 431 STAINLESS STEEL, MANUFACTURING PROCESS REQUIREMENTS
MIL-H-8775 Revision D:1976 HYDRAULIC SYSTEM COMPONENTS, AIRCRAFT AND MISSILES GENERAL SPECIFICATION FOR
MIL-N-85730 Base Document:1988 NUT, SELF-LOCKING, SPLINE DRIVE, ASSEMBLED WASHER, NICKEL ALLOY 718, 220 KSI FTU, 900 DEGREES F, GENERAL SPECIFICATION FOR
MIL-STD-1312-11 Revision A:1984 FASTENER TEST METHODS, METHOD 11, TENSION AND FATIGUE
MIL-N-45938-6 Revision C:1995 NUT, SELF LOCKING, CLINCH (SWAGE-CLINCHING, KNURLED SHANK, MINIATURE 450 DEG.F)
MIL-B-8831 Revision B:1982 BOLT, 180 KSI FTU AND 180 KSI FSU 450 DEG F PROTRUDING AND FLUSH HEAD, GENERAL SPECIFICATION FOR
MIL-I-8846 Revision D:1994 INSERT, SCREW THREAD, HELICAL COIL
MIL-B-7838 Revision C:1989 BOLT, INTERNAL WRENCHING 160 KSI FTU
MIL-N-8984 Base Document:1972 NUT, SELF-LOCKING, STEEL, 260 KS1 FTU 450 DEGREES F
MIL-N-8985 Base Document:1972 NUT, SELF-LOCKING STEEL, 180 KS1 FTU 450 DEGREES F
MIL F 9490 : D FLIGHT CONTROL SYSTEMS - DESIGN, INSTALLATION AND TEST OF PILOTED AIRCRAFT, GENERAL SPECIFICATION FOR
MIL-S-45915 Revision A:1967 STUD, LOCKED IN - KEY LOCKED - GENERAL SPECIFICATION FOR
MS124731THRUMS124770 Revision D:1976 INSERT, CRES HELICAL COIL FINE THREAD, 2 DIA NOMINAL LENGTH
MIL-B-8952 Revision B:1995 BEARING, ROLLER, ROD END, ANTIFRICTION, SELF-ALIGNING
MIL-DTL-6162 Revision C:2000 GENERATORS AND STARTER-GENERATORS, ELECTRICAL DIRECT CURRENT, NOMINAL 30 VOLTS, AIRCRAFT GENERAL SPECIFICATION FOR
MIL-F-8961 Revision A:1992 Fastener Element, Self-Locking, Externally Threaded, 450 Degrees Fahrenheit and 1,200 Degrees Fahrenheit
MIL F 18240 : E FASTENER ELEMENT, SELF-LOCKING, THREADED FASTENER, 250 DEG F MAXIMUM
NAS1068:1991 NUT, SELF-LOCKING, PLATE, TWO LUG, LOW-HEIGHT, C'BORED, FLOATING, REDUCED RIVET SPACING
MIL-C-7413 Revision B:1970 COUPLING, QUICK DISCONNECT, AUTOMATIC SHUTOFF, GENERAL SPECIFICATION FOR
MIL-I-45934 Base Document:1971 INSERT, SCREW THREAD, KEYRING LOCKED, SELF LOCKING AND NON SELF LOCKING, 125, 180, AND 220 KSI FTU: GENERAL SPECIFICATION FOR
SAE AS1349B Insert, Screw Thread, Helical Coil, Locking (Low Friction Systems), Performance Standard for
MIL-PRF-25676 Revision E:1997 ADAPTER, PRESSURE LUBRICATING OIL SERVICING, AIRCRAFT
NASM 21056:2015 NUT, SELF-LOCKING, PLATE, CORNER, LOW HEIGHT, CRES, 125 KSI FTU, 450 DEGREES F & 800 DEGREES F
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 Base Document:1988 BEARINGS, ELASTOMERIC GENERAL SPECIFICATION FOR
MIL S 25057 : B SCREEN SYSTEM, AIR INLET, AIRCRAFT TURBINE ENGINE, GENERAL SPECIFICATION FOR
MIL-B-81365 Base Document:1966 BLEED AIR SYSTEMS, GENERAL SPECIFICATIONS FOR
MIL-C-38373 Revision B:1975 CAP, FLUID TANK FILLER
SAE AS7481C Studs, Steel, UNS S66286 Aged After Roll Threaded Procurement Specification For
NASM 7838 : 2004 BOLT, INTERNAL WRENCHING, 160 KSI FTU
NASM21076 : 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
SAEITC TS149-2 TS149 Technical Specification for All Metal Self-Locking Nuts (UNJ Threads) 1550 MPa (225,000 lbf/in²) Minimum Tensile Strength at Ambient Temperature
MIL-H-38360 Revision B:1966 HOSE, ASSEMBLIES, TETRAFLUOROETHYLENE, HIGH-TEMPERATURE, HIGH PRESSURE, 3000 PSI HYDRAULIC AND PNEUMATIC
FED-STD-H28 Revision A:1994 Screw-Thread Standards for Federal Services
MIL-S-8710 Revision B:1969 STRAINER, AIRFRAME FUEL SYSTEM, GENERAL SPECIFICATION FOR
MIL-M-7997 Revision C:1981 Motor, Aircraft Hydraulic, Constant Displacement General Specification for
NASM21042:1998 NUT, SELF-LOCKING, 450 DEGREES F, REDUCED HEXAGON, REDUCED HEIGHT, RING BASE, NON-CORROSION RESISTANT STEEL
SAE AMS 7482 : 1995 STUDS - STEEL, CORROSION AND HEAT RESISTANT,ROLL THREADED AFTER HEAT TREATMENT, 1800F (980 C) SOL HEAT TREATED
MIL-V-8610 Revision B:1984 VALVE, FUEL SHUTOFF SOLENOID OPERATED, 28 VOLT, DC
MIL F 83296 : 0 FITTING, TETRAFLUOROETHYLENE HOSE, HIGH TEMPERATURE, HIGH PRESSURE (3,000 PSI HYDRAULIC AND PNEUMATIC)
MIL-P-87210 Base Document:1984 PNEUMATIC POWER SYSTEMS, HIGH PRESSURE
MIL-B-85667-10 Base Document:1991 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 Base Document:1989 Nut, Self-Sealing, Self-Locking, Alloy Steel, 125 KSI FTU, 250 Deg. F and 450 Deg. F
MIL E 24021 : J NOTICE 1 ELECTRIC POWER MONITORS, EXTERNAL, AIRCRAFT
MIL-DTL-27536 Revision C:1995 COUPLING, CLAMP, GROOVED, V-BAND
MIL-F-5509 Revision D:1978 FITTING, FLARED TUBE, FLUID CONNECTION
MIL-I-45914 Revision A:1991 INSERT, SCREW THREAD - LOCKED IN, KEY LOCKED
MIL-D-8804 Revision B:1993 DE-ICING SYSTEM, PNEUMATIC BOOT, AIRCRAFT, GENERAL SPECIFICATION FOR
MIL C 22263 : B COUPLING FUEL LINE, FLEXIBLE, 125 PSI, GENERAL SPECIFICATION FOR
MIL T 83454 : 0 TERMINAL, STUD, BLIND PLATE, FOR ELECTRICAL BONDING AND GROUNDING (NONINSULATED)
SAE AS4098A Hose Assembly, Polytetrafluoroethylene, Heavy Duty, Metallic Reinforced, 400 °F, 5000 psi Hydraulic and Pneumatic
SAE ARP1616B Self-Sealing Breakaway Valves for Crash-Resistant Aircraft Fuel and Oil Systems
SAE AS 8025 : 2016 PASSENGER OXYGEN MASK
MS33537 Revision E:1974 INSERT, SCREW THREAD, HELICAL COIL, COARSE AND FINE THREAD, STANDARD DIMENSIONS FOR
MIL-F-8615 Revision D:1976 FUEL SYSTEM COMPONENTS, GENERAL SPECIFICATION FOR [ASG]
NAS496:2002 BOLTS - INTERNAL WRENCHING
MIL G 6162 : B GENERATOR AND STARTER GENERATOR, ELECTRIC DIRECT CURRENT, NOMINAL 30 VOLTS AIRCRAFT GENERAL SPECIFICATION
JSSG-2006 Base Document:1998 JOINT SERVICE SPECIFICATION GUIDE - AIRCRAFT STRUCTURES
MIL-F-18280 Revision F:1995 FITTING, FLARELESS TUBE, FLUID CONNECTION
SAE AS4444 Fittings, 24° Cone Flareless, Fluid Connection, 5000 psi
MIL-B-85667-13 Base Document:1991 BOLT, 100 DEGREES TENSION FLUSH HEAD, STRAIGHT SHANK, ALUMINUM ALLOY SLEEVE, TITANIUM ALLOY PIN, 95 KSI FSU, 160 KSI FTU
MIL-B-8948 Revision A:1972 Bearing, Plain, Rod End, TFE Lined, Self-Aligning
MIL-S-7742 Revision D:1991 SCREW THREADS, STANDARD, OPTIMUM SELECTED SERIES, GENERAL SPECIFICATION FOR
NASA KSC F 124 : 1994 SPECIFICATION FOR FITTINGS, FLARED TUBE
MS9688 Revision A:1988 BOLT MACHINE HEXAGON HEAD DRILLED 1 HOLE PD SHANK STEEL AMS 6304 DIFFUSED NICKEL CADMIUM PLATE .375-24 UNJF3A
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 Revision B:1975 Regulators, Voltage, and Control Panels Aircraft, Direct Current Generator, General Specification for
DOD-E-8983 Revision C:1977 ELECTRONIC EQUIPMENT, AEROSPACE, EXTENDED SPACE ENVIRONMENT, GENERAL SPECIFICATION FOR
MIL-E-85583 Revision A:1987 ELECTRIC POWER GENERATING CHANNEL, VARIABLE INPUT SPEED, ALTERNATING CURRENT, 400 HZ, AIRCRAFT, GENERAL SPECIFICATION FOR
MIL-N-85729 Base Document:1988 NUT, SELF-LOCKING, A-286, 160 KSI FTU, 450 DEGREES F, GENERAL SPECIFICATION FOR
MIL-S-38399 Revision A:1975 STARTER, PNEUMATIC, AIRCRAFT ENGINE GENERAL SPECIFICATION FOR
MIL-B-85667-9 Base Document:1991 BOLT, SLEEVE, PROTRUDING HEAD, STRAIGHT SHANK, CRES 304 SLEEVE, CRES A-286 PIN, 95 KSI FSU, 160 KSI FTU, 450 DEGREES F
SAE AS1371A Nuts, Self-Locking, Corrosion Resistant Steel High Strength, Prevailing Torque, All Metal 800°F (427°C) Use, UNJ Thread Form
SAE ARP260D Control Lever Connections (60° V Serrations)
SAE AS4726A Nuts, Self-Locking, UNS S66286 Classification: 220 ksi/850 °F Procurement Specification
SAE AS4897 Hose Assembly, Polytetrafluoroethylene (PTFE), Low Pressure, 450 °F and Fireproof, Procurement Specification for
EN 6113:2015 Aerospace series - Circuit breaker, connecting and attachment hardware
MIL-DTL-18240 Revision F:1997 FASTENER ELEMENT, SELF-LOCKING, THREADED FASTENER, 250 DEGREES F MAXIMUM
MIL-HDBK-60 Base Document:1990 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 Base Document:1985 FITTING, TUBE, FLUID SYSTEMS, SEPARABLE, HIGH PRESSURE, DYNAMIC BEAM, SEAL, GENERAL SPECIFICATION FOR
NASM 21209 : 2003 INSERT, SCREW THREAD, COARSE AND FINE, SCREW LOCKING, HELICAL COIL, CRES
MIL-N-25161 Revision C:1969 NOZZLE, AERIAL PRESSURE REFUELING, TYPE MA-2
BS EN 6113:2015 Aerospace series. Circuit breaker, connecting and attachment hardware
MIL-P-85315 Base Document:1979 Pump, Ejector, Air Vehicle Fuel, General Specification For
SAE AS1960 Coupling Assembly, V-Band, Sheet Metal Flange, Pneumatic Tube
13/30285939 DC : 0 BS EN 6113 - AEROSPACE SERIES - CIRCUIT BREAKER, CONNECTING AND ATTACHMENT HARDWARE
MIL-B-3990 Revision D:1980 BEARINGS, ROLLER, NEEDLE, AIRFRAME, ANTIFRICTION, INCH
MS9558 Revision E:1993 BOLT, MACHINE DOUBLE HEXAGON EXTENDED WASHER HEAD CORROSION AND HEAT RESISTANT STEEL, .3125-24 UNJF-3A
NASA MSFC STD 506 : 1988 MATERIALS AND PROCESSES CONTROL
MIL R 5149 : B ROCKET ENGINE, LIQUID PROPELLANT GENERAL SPECIFICATION FOR
MIL-T-5955 Revision C:1970 TRANSMISSION SYSTEM, VTOL-STOL GENERAL REQUIREMENTS FOR
NASM25027:2012 NUT, SELF-LOCKING, 250 DEGREES F, 450 DEGREES F, AND 800 DEGREES F
MIL-W-5013 Revision L:1991 WHEEL AND BRAKE ASSEMBLIES - AIRCRAFT, GENERAL SPECIFICATION FOR
SAE AS4388 Hose Assembly PTFE Heavy Duty, -65 To 400 °F (-55 To 204 °C) 8000 psi (56 000 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
API 616 : 2011 GAS TURBINES FOR THE PETROLEUM, CHEMICAL, AND GAS INDUSTRY SERVICES
SAE AS82C Screw Thread Form, American National, Modified (National Round - NR)
SAE MA2079 Hose Assembly, Convoluted Polytetrafluoroethylene, High Temperature, Medium Pressure, Aircraft, Metric

FED-STD-H28-4 Base Document:1978 Screw Thread Standards for Federal Services, Section 4, Controlled Radius Rood Screw Threads, UNJ Symbol
FED-STD-H28-1 Revision A:1985 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-H28-2 Revision B:1991 Screw-Thread Standards for Federal Services Section 2 Unified Inch Screw Threads- UN and UNR Thread Forms
FED-STD-H28-20 Revision B:1994 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 Revision A:1978 SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 6 GAGES AND GAGING FOR UNIFIED SCREW THREADS-UN AND UNR THREAD FORMS

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