The Block,step,machinists', cataloged under National Stock Number 5220-01-345-7646, is classified within Federal Supply Class 5220 (Inspection Gages and Precision Layout Tools) of the Measuring Tools group. The manufacturer of record is Oldbury Uk Ltd. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Block,step,machinists' |
| FSC / FSG | 5220 — Inspection Gages and Precision Layout Tools (FSG 52) |
| Manufacturers | Oldbury Uk Ltd (CAGE K7978) |
| Parameter | Value |
|---|---|
| NSN | 5220-01-345-7646 |
| Primary Part Number | D-137 |
| Item Name | Block,step,machinists' |
| FSC / FSG | 5220 / 52 — Inspection Gages and Precision Layout Tools |
| Manufacturer | Oldbury Uk Ltd |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| D-137 | Oldbury Uk Ltd (GBR) |
| Reference | Meaning |
|---|---|
| D-137 | 3/9 Design control — primary reference U.S. Government activity |
| D-137 | 5/9 Secondary reference Boughton Engineering Limited |
NSN 5220-01-345-7646 is a Block,step,machinists', manufactured by Oldbury Uk Ltd, classified under FSC 5220, Inspection Gages and Precision Layout Tools. Status: active.
NSN 5220-01-345-7646 has 1 manufacturer part number on file: D-137 (Oldbury Uk Ltd).
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.