BS A 346:2000
Current
The latest, up-to-date edition.
UNJ threads. General requirements and limit dimensions
Hardcopy , PDF
English
15-01-2000
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Foreword
1 Scope
2 Normative reference
3 Term and definition
4 Basic profile
5 Series of threads
6 Tolerances
7 Gauging
8 Designation of threads
9 Tables
Describes the general requirements and limit dimensions of inch series UNJ threads with controlled root radius for aerospace construction.
| Committee |
ACE/12
|
| DevelopmentNote |
Also numbered as ISO 3161 Supersedes 97/716095 DC and BS 4084(1996) (06/2005)
|
| DocumentType |
Standard
|
| Pages |
48
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This International Standard specifies the general requirements and limit dimensions of inch series UNJ threads with controlled root radius for aerospace construction.
It determines the basic triangular profile for this type of thread and gives a system for designating the diameter and number of threads per inch combinations. For all diameters 0,060 in (1,524mm) to 6,000 in (152,4mm), it offers in the form of tables the basic dimensions and tolerances for a selection of diameter and number of threads per inch combinations. It also provides the method of calculation for the dimensions and tolerances for any diameter and number of threads per inch combination not given in the tables, including threads with a diameter in excess of 6.000 in.
| SAEITC TS220-1 | TS220 Technical Specification for Self Locking Union Nuts (Unified Threads) Manufactured from INCO718 Material.1270 MPa (185000 lbf/in2) Minimum Tensile Strength at Room Temperature |
| SBAC TS 128 : 6 | 'ALL-METAL' SELF-LOCKING NUTS (UNJ THREADS) 1100 MPA (160,000 LBF/IN[2]) MINIMUM TENSILE STRENGTH AT ROOM TEMPERATURE |
| SBAC RS 678 : 6 | FASTENERS, ROLLED THREADS, CHAMFERS, LEAD THREADS & RUNOUTS |
| SBAC TS 24 : 6 | MANUFACTURING SPECIFICATION FOR BOLTS, 1275 MPA (185,000 LBF/IN[2]) - TENSILE AT ROOM TEMPERATURE, 1000 MPA (145,000 LBF/IN[2]) TENSILE AT 650 DEGREE C |
| SAEITC TS66-6 | TS66 Draughting and Part Numbering Procedures for Drawings |
| SBAC TS 145 : 4 | TECHNICAL SPECIFICATION NO. TS145 - MANUFACTURING SPECIFICATION FOR BOLTS (UNIFIED THREADS) HEAT RESISTING ALLOY STEEL FV535, CLASSIFICATION RM >= 1000 MPA (145,000 LBF/IN[2]) @ TA/+550 DEGREES C |
| 15/30329889 DC : 0 | BS A 266 TO 271 - BOLT, 100 DEGREES COUNTERSUNK HEAD, HI-TORQUE SPEED DRIVE RECESS, UNJF THREAD, SPLIT PIN HOLE OPTION, TITANIUM ALLOY, VARIOUS FINISHES, CLASSIFICATION: 80 TF/IN[2] (1100 MPA) AT TA/+315 DEGREES C |
| 07/30165543 DC : DRAFT MAY 2007 | BS 4A 100 AMD1 - SPECIFICATION FOR GENERAL REQUIREMENTS FOR BOLTS AND FREE RUNNING NUTS OF TENSILE STRENGTH NOT EXCEEDING 1249 MPA |
| BS 4A 100:2003 | Specification for general requirements for bolts and free running nuts of tensile strength not exceeding 1249 MPa |
| BS 2A 266 to 2A 271:2016+A1:2019 | Aerospace Series. Bolt, 100° Countersunk head, Hi-Torque speed drive recess, close tolerance shank, UNJF thread, split pin hole option, titanium alloy, various finishes. Classification: R<sub>m</sub> 1100–1250 MPa (160 000–180 000 lbf/in<sup>2</sup>) at Ambient Temperature | +315 °C |
| BS 2A241(2005) : 2005 | GENERAL REQUIREMENTS FOR STEEL PROTRUDING-HEAD BOLTS OF TENSILE STRENGTH 1250 MPA (180000 LBF/IN[2]) OR GREATER - SPECIFICATION |
| ISO 15872:2017 | Aerospace — UNJ threads — Gauging |
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