Thread Types - Content

Thread Types

Product Code Description
UN Unified Inch Screw Thread, Constant-Pitch Series
UNC Unified Inch Screw Thread, Coarse-Pitch Series
UNF Unified Inch Screw Thread, Pine-Pitch Series
UNEF Unified Inch Screw Thread, Extra-Fine Series
UNS Unified Inch Screw Thread, Special Diameter Pitch, or Length of Engagement
UNJ Unified Inch Screw Thread, Constant-Pitch Series, with Rounded Root of Radius 0.15011P to 0.18042P
UNJC Unified Inch Screw Thread, Coarse-Pitch Series, with Rounded Root of Radius 0.15011P to 0.18042P
UNJF Unified Inch Screw Thread, Fine-Pitch Series, with Rounded Root of Radius 0.15011P to 0.18042P
UNJEF Unified Inch Screw Thread, Extra-Fine-Pitch Series, with Rounded Root of Radius 0.15011P to 0.18042P
UNR Unified Inch Screw Thread, Constant-Pitch Series, with Rounded Root of Radius not less than 0.108P
UNRC Unified Inch Screw Thread, Coarse-Pitch Series, with Rounded Root of Radius not less than 0.108P
UNRF Unified Inch Screw Thread, Fine-Pitch Series, with Rounded Root of Radius not less than 0.108P
UNREF Unified Inch Screw Thread, Extra-Fine Pitch Series, with Rounded Root of Radius not less than 0.108P
NC5 Class 5 Interference Fit External Threads
NC5HF For Driving in Hard Ferrous Material of Hardness over 160 Bhn
NC5CSF For Driving Copper Alloy and Soft Ferrous Material of 160 Bhn or less
NC5ONF For Driving in Other NonFerrous Material (Nonferrous Materials Other Than Copper Alloys, Any Hardness)
NC5 Class 5 Interference Fit Internal Threads
NC5IF Entire Ferrous Material Range
NC5INF Entire Nonferrous Material Range
M Metric Screw Threads-M Profile with Basic ISO 68 Profile
MJ Metric Screw Threads-MJ Profile with Rounded Root of Radius 0.15011P to 0.18042P
MJS Metric Screw Threads-MJ Profile Special Series
UNM Unified Minature Thread Series
NPT American Standard Taper Pipe Threads for General Use
NPTF Dryseal American Standard Taper Pipe Threads
F-PTF Dryseal Fine Taper Thread Series
PTF-SAE Short Dryseal SAE Short Taper Pipe Threads
PTF-SPL Short Dryseal Special Short Taper Pipe Threads
PTF-SPL Extra Short Dryseal Special Short Taper Pipe Threads
SPL-PTF Dryseal Special Taper Pipe Threads
ANPT Aeronautical National Form Taper Pipe Threads
NPSM American Standard Straight Pipe THreads for Free Fitting Mechanical Joints for Fixtures
NPSL American Standard Strainght Pipe Threads for Loose-Fitting Mechanical Joints with Locknuts
NPSC American Standard Straight Pipe Threads in Pipe Couplings
NPSF Dryseal American Standard Fuel Internal Straight Pipe Threads
NPSI Dryseal American Standard Intermediate Internal Straight Pipe Threads
NH American Standard Hose Coupling Threads of Full Form
NPSH Dryseal American Standard for Hose Coupling Joints with Straight Internal and External Loose Fitting Threads
NFPA 1963 Fire Hose Connections
NHR American Standard Hose Coupling Threads for Garden Hose Applications
NGT National Gas Taper Threads
NGO National Gas Outlet Threads (1)
NGS National Gas Straight Threads
SGT Special Gage Taper Threads
R British Taper Pipe Threads
Rc, Rp British Taper Pipe Threads
G Straight Pipe Threads
BSW British Parallel Screw Threads
BSF British Parallel Screw Threads
BA British Screw Threads
ACME-C Acme Threads, Centralizing
ACME-G Acme Threads, General Purpose
STUB ACME Stub Acme Threads
BUTT Buttress Threads, Pull Type
PUSH-BUTT Buttress Threads, Push Type
AMO Amaerican Standard Microscope Objective Threads
AWWA Underground Service LIne Valves and Fittings
DIN German Specifications
JIS Japanese Industrial Standard
ISO International Organization of Standards