1、e Bao 2A230:June1974 UDC 629.7.02 : 621.882.21 British Standard: Aerospace Series Specification for IOQ“ countersunk head steel bolts A i! 1 100 MPa with _- Hi-torque - speed - drive _- - - _ recesses* -I ! _- - 1- - I_ I Contents Foreword Specification 1. Scope 2. General requirements 3. Material a
2、nd manufacture 4. Dimensions 5. Screw threads 6. Anti-corrosion treatment 7. Identification and niarking 8. Gsuging t-1, c; Appendices A. B. Recess penetration gauge C. Driver tips D. Oversize bolts E. Principles of flushness control and recommended gauging practice Table for the conversion of inche
3、s to niilliinetre equivalents Foreword Page 1 2 2 2 2 2 2 3 3 11 14 18 19 19 Tables 1. 2. 3. Dimensions of gauge block 4. 5. Dimensions of gauge points 6. Driver tip envelope dimensions Thread, head and recess dimensions Bearing length L and overall length E Dimensions of sleeve and gauge pin Figure
4、s 1. Bolt dimensions 2. Diagram showing maximum and minimurqheadjconditions 3. Bolt dimenins 4. Method of measuring head protrusion 5. Protrusion gauge block 6. Recess penetration gauge 7. Gauge points 8. Driver tip envelope _ Page 6 7 13 16 17 18 IC_ _ - British -_ Standard A 730 was prepared to pr
5、ovide a,range of 1100 MPa to,GT_- _ - 1250m j steel bolts with UNJ profile threads andclose tolerance 100 countersunk heads and shanks rar indarch are revised, when necessary, by the issue either of amendment slips or of revised editions. It is important that uwrs of ritich Standard5 should ascertai
6、n that they are in possession of the latest amendments or editions. iic fiili(iwiiip Mi references relate to the work 011 this stndard: (ininiittw rcferciice ACI/l2 1)rlift for comment 72/36929 Amendment Slip No.1, published 29 October 1976 to British Standard 2A 230 : 1974 (Aerospace Series) 100 co
7、untersunk head steel bolts I60 O00 ibf/in2 (1100 MPa) with Hi-torque speed drive recesses Revised text AMD 2130 AMD 2130 October 1976 Contents In the entry for Fig. 2 delete lead and substitute head. AMD 2130 October 1976 Foreword At the end of the list of reference standards insert the following: S
8、 149 S t At the bottom of the page insert the following footnote: t in course of preparation. 1.75 per cent nickel-chromium-molybdenum steel 1 96 chromium-molybdenum steel bars for the manufacture of forged bolts and forged nuts . AMD 2130 October 1976 Clause 3.1 Delete S 147 and S 148 and substitut
9、e the follow&g: S 147 or S 148 or S 149 or s ,*t AMD 2130 Clause 3.2 October 1976 In line 3 delete (96 MPa) and substitute (960 MPa). AMD 2130 October 1976 Table 1. Thread, head and recess dimensions In column 10 delete the last entry .1.017 and substitute 1.007. In column 15, for size 3/8-24, delet
10、e 0.0246 and substitute 0.0426. 7610-2Ak-B Gr O Amendment No. 2 published and effective from 31 May 1990 to British Standard 2A 230 : 1974 (Aerospace serios) Specification for 100 O countersunk head steel bolts I60 O00 Ibf/in2 (1100 MPa) with Hi-torque speed drive recesses” AMD 6151 Revised text AMD
11、 6151 May 1990 Title In the title delete 160 O00 1bf/in2 (1 100 MPa) with Hi-torque speed drive recesses* J and Substitute 1100 MPa with Hi-torque speed drive recesses* . AMD 6151 May 1990 Foreword (as amended by Amendment No. 1) In paragraph 1, delete range of 160 O00 lbf/in2 (1 100 MPa) to 180 O00
12、 lbf/in2 (1250 MPa) and substitute range of 1100 MPa to 1250 MPa. In paragraph 2, delete steel bolts (160 O00 lbf/in2 (1 10 hbar) with torq-set recesses) and substitute (1 100 MPa with Torq-set recesses). In the paragraph relating to standards referred to delete, BS A 100 General requirements for bo
13、lts and nuts of tensile strength not exceeding 180 O00 lbf/in2 (1 250 MPa) and substitute the following: BS A 100 General requirements for bolts and nuts of tensile strength not exceeding 1250 MPa. AMD 6151 May 1990 Clause 3.2 (as amended by Amendment No. 1). In line 3 delete, 140 O00 lbf/in2 (960 MPa) and substitute 960 MPa. In line 4 delete, 160 O00 lbf/in2 (1100 MPa) and substitute 1100 MPa.
