The Proving Ring, cataloged under National Stock Number 6635-01-244-3050, is classified within Federal Supply Class 6635 (Physical Properties Testing and Inspection) of the Instruments and Laboratory Equipment group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6635-01-244-3050 |
| Item Name | Proving Ring |
| FSC / FSG | 6635 / 66 — Physical Properties Testing and Inspection |
| Status | ACTIVE |
| General Characteristics Item Description | 18.250 IN. OVERALL DIA; 15.312 IN. OD BELOW BOSS ON TOP/BOTTOM; 7.000 IN. WIDE; 2.500 IN. BOSS DIA; BALL HEIGHT 0.750 IN.; 0.875 IN. BALL DIA; EQUIPPED W/ELEC REED VIBRATOR,DIAL REVOLUTION COUNTER,VERNIER INDEX,CARBIDE MICROMETER CONTACT IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 377000 | 3/2 Design control — primary reference U.S. Government activity |
| 1000-100000 | 3/2 Design control — primary reference U.S. Government activity |
NSN 6635-01-244-3050 is a Proving Ring, classified under FSC 6635, Physical Properties Testing and Inspection. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5340-01-513-4901, 5930-01-547-0362. Verify interchangeability with system specifications before substitution.
Key specifications for 6635-01-244-3050: General Characteristics Item Description: 18.250 IN. OVERALL DIA; 15.312 IN. OD BELOW BOSS ON TOP/BOTTOM; 7.000 IN. WIDE; 2.500 IN. BOSS DIA; BALL HEIGHT 0.750 IN.; 0.875 IN. BALL DIA; EQUIPPED W/ELEC REED VIBRATOR,DIAL REVOLUTION COUNTER,VERNIER INDEX,CARBIDE MICROMETER CONTACT IN. 1 specification is documented in the U.S. Government catalog.
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.