The Follower,stop Bolt, cataloged under National Stock Number 1020-01-453-8043, is classified within Federal Supply Class 1020 (Guns, Over 125mm Through 150mm) of the Weapons group. The manufacturer of record is Naval Sea Systems Command. 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1020-01-453-8043 |
| Primary Part Number | 751-6402503 FIND 21 |
| Item Name | Follower,stop Bolt |
| FSC / FSG | 1020 / 10 — Guns, Over 125mm Through 150mm |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| General Characteristics Item Description | NICKEL COPPER PER QQ-N-281 CL A,FORM -6,COND-HF |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 751-6402503 FIND 21 | Naval Sea Systems Command (USA) |
| 751-6402503-21 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 751-6402503 | D/9 Drawing number reference only Naval Sea Systems Command |
| 211092189 | 3/2 Design control — primary reference U.S. Government activity |
| 751-6402570 ITEM 1 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| 211092189 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| 751-6402502-21 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
NSN 1020-01-453-8043 is a Follower,stop Bolt, manufactured by Naval Sea Systems Command, classified under FSC 1020, Guns, Over 125mm Through 150mm. Status: active.
NSN 1020-01-453-8043 has 2 manufacturer part numbers on file: 751-6402503 FIND 21 (Naval Sea Systems Command), 751-6402503-21 (Naval Sea Systems Command).
Key specifications for 751-6402503 FIND 21: General Characteristics Item Description: NICKEL COPPER PER QQ-N-281 CL A,FORM -6,COND-HF; End Item Identification: SEAWOLF CLASS SSN. 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.
NSN 1020-01-453-8043 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.