The Ring,shear, cataloged under National Stock Number 6640-00-557-0187, is classified within Federal Supply Class 6640 (Laboratory Equipment and Supplies) of the Instruments and Laboratory Equipment group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6640-00-557-0187 |
| Item Name | Ring,shear |
| FSC / FSG | 6640 / 66 — Laboratory Equipment and Supplies |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS. |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| NW3604R4PC6 | 5/9 Secondary reference National Annealing Box Co |
| 1031Z7 | 5/9 Secondary reference Avery and Saul Co Inc |
| NW3746R3PC7 | 5/9 Secondary reference National Annealing Box Co |
| NW3607PC8 | 5/9 Secondary reference National Annealing Box Co |
| NW3746REV3PC7 | 5/9 Secondary reference National Annealing Box Co |
| 1029ZPC7 | 5/9 Secondary reference Avery and Saul Co Inc |
| NW3607REV3PC8 | 3/9 Design control — primary reference National Annealing Box Co |
| 3308036PC8 | 5/1 Secondary reference U.S. Government activity |
NSN 6640-00-557-0187 is a Ring,shear, classified under FSC 6640, Laboratory Equipment and Supplies. Status: active.
Key specifications for 6640-00-557-0187: Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.. 2 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 6640-00-557-0187 has DEMIL Code F. Demilitarization may be required before disposal or transfer to non-military entities.
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.