The Collar,mechanical Unit,limit Sto, cataloged under National Stock Number 6605-01-030-0041, is classified within Federal Supply Class 6605 (Navigational Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Lockheed Martin Corporation Div Rms. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 6605-01-030-0041 |
| Primary Part Number | 1020B0553 |
| Item Name | Collar,mechanical Unit,limit Sto |
| FSC / FSG | 6605 / 66 — Navigational Instruments |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL QQ-S-763 CL303 COND A PASSIVATED,O/A DIM. 0.560 IN. OD,0.310 IN. LG W/RAISED PIE-SHAPED LUG 0.050 IN. H,CTR TAPPED 0.375-16UNC 2B,TWO HOLES 180.0 DEG APART THRU WALL W/ONE TAPPED 4-40UNC 2B IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1023C0503PC10 | Lockheed Martin Corporation Div Rms (USA) |
| 1020B0553 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| Reference | Meaning |
|---|---|
| 1023C0503PC10 | 5/9 Secondary reference Martin Marietta Technologies Inc Sub of Martin Marietta Corp Aero and Naval Systems |
| 1020B0553 | 5/9 Secondary reference Martin Marietta Technologies Inc Sub of Martin Marietta Corp Aero and Naval Systems |
NSN 6605-01-030-0041 is a Collar,mechanical Unit,limit Sto, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 6605, Navigational Instruments. Status: active.
NSN 6605-01-030-0041 has 2 manufacturer part numbers on file: 1023C0503PC10 (Lockheed Martin Corporation Div Rms), 1020B0553 (Lockheed Martin Corporation Div Rms).
Key specifications for 1020B0553: General Characteristics Item Description: STEEL QQ-S-763 CL303 COND A PASSIVATED,O/A DIM. 0.560 IN. OD,0.310 IN. LG W/RAISED PIE-SHAPED LUG 0.050 IN. H,CTR TAPPED 0.375-16UNC 2B,TWO HOLES 180.0 DEG APART THRU WALL W/ONE TAPPED 4-40UNC 2B IN. 1 specification is 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 6605-01-030-0041 has DEMIL Code B. 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.