Page 716 - Yamawa_European_Catalogue_YEU21

23. Symbol for Standard Threads

Intro

America
SP
Thread symbol Kinds of thread Related Standard
UN Unifi ed inch screw threads ANSI B 1.1
UNC/UNRC Unifi ed coarse thread series ANSI B 1.1
UNF/UNRF Unifi ed fi ne thread series ANSI B 1.1
SL
UNEF/UNREF Unifi ed extra-fi ne thread series ANSI B 1.1
4UN/4UNR Unifi ed constant-pitch series with 4-threads ANSI B 1.1
6UN/6UNR Unifi ed constant-pitch series with 6-threads ANSI B 1.1
8UN/8UNR Unifi ed constant-pitch series with 8-threads ANSI B 1.1
PO 12UN/12UNR Unifi ed constant-pitch series with 12-threads ANSI B 1.1
16UN/16UNR Unifi ed constant-pitch series with 16-threads ANSI B 1.1
20UN/20UNR Unifi ed constant-pitch series with 20-threads ANSI B 1.1
28UN/28UNR Unifi ed constant-pitch series with 28-threads ANSI B 1.1
ST 32UN/32UNR Unifi ed constant-pitch series with 32-threads ANSI B 1.1
UNS/UNRS Unifi ed threads of special diameters, pitches and lengths of engagement ANSI B 1.1
NR American National thread with a 0.108p to 0.144p controlled root radius MIL-B-7838
Acme Acme screw threads ANSI B 1.5
ROLL Stub-Acme Stub Acme screw threads ANSI B 1.8
Butt Buttress inch screw threads ANSI B 1.9
UNM Unifi ed miniature thread series ANSI B 1.10
NC5 Class 5 interference-fi t thread ANSI B 1.12
NPT American Standard taper pipe threads tor general use ANSI/ASME B 1.20.1
CARBIDE
NPTR American Standard taper pipe threads tor railing joints ANSI/ASME B 1.20.1
NPSC American Standard straight pipe thread in pipe couplings ANSI/ASME B 1.20.1
NPSL American standard straight pipe threads for loose-fi tting mechanical joints with locknuts ANSI/ASME B 1.20.1
NPSM American Standard straight pipe threads for free-fi tting mechanical joints for fi xture ANSI/ASME B 1.20.1
LONG NPSH American Standard straight pipe threads tor loose-fi tting mechanical joints for hose couplings ANSI/ASME B 1.20.1
NPTF Dryseal American Standard taper pipe threads ANSI B 1.20.3, 1.20.4
F-PTF Dryseal fi ne taper pipe thread series ANSI B 1.20.3, 1.20.4
HAND PTF-SAE SHORT Dryseal SAE short taper pipe threads ANSI B 1.20.3, 1.20.4
TAPS PTF-SPL SHORT Dryseal special short taper pipe threads ANSI B 1.20.3, 1.20.4
PTF-SPL EXTRA SHORT Dryseal special extra short taper pipe threads ANSI B 1.20.3, 1.20.4
SPL-PTF Dryseal special taper pipe threads ANSI B 1.20.3, 1.20.4
NPSI Dryseal American Standard intermediate internal straight pipe threads ANSI B 1.20.3, 1.20.4
EG (STI) NPSF Dryseal American Standard fuel internal straight pipe threads ANSI B 1.20.3, 1.20.4
ANPT Aeronautical National Form taper pipe threads MIL-P-7150
NGO National gas outlet threads ANSI B 57.1
NGS National gas straight threads ANSI B 57.1
SPECIAL
THREADS, NGT National gas taper threads ANSI B 57.1
GAUGES SGT Special gas taper threads ANSI B 57.1
NH Hose coupling and fi rehose coupling threads USAS B 2.4
NHR Hose coupling and fi rehose coupling threads USAS B 2.4
THREAD NPSH Hose coupling and fi rehose coupling threads USAS B 2.4
MILLS AMO American standard microscope objective threads ANSI B 1.11

DIES

CENTER
DRILLS

Technical
info

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