Compreg clamp for 20 mm bore pipe to RDSO drg. no. WD- 04058- S- 01, item- 1, Alt. 5. Matl. & Spec. As per drg. and 01 No. packing, item no. 18 of RDSO drg. no. WD- 80007- S- 20 Alt. 17 & 02 Nos. of Std. hex head bolt M10 x 100 mm long with Std. nut and spring washer to IS: 1363 & 3063 ( in assembled condition ).