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| BS871-C WEIGHT,GRADE P320 | K7766 | BRITISH STANDARDS INSTITUTION |
| DEF STAN 53-4-P320-WEIGHT C | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| DEFSTAN 53-4 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| BS871CWEIGHTGRADEP320 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS872 | K7766 | BRITISH STANDARDS INSTITUTION |
| SP38959 | K7404 | OGCBUYING.SOLUTIONS |
| P320 | K7766 | BRITISH STANDARDS INSTITUTION |