The Block,cylinder and Post, cataloged under National Stock Number 1420-01-042-7900, is classified within Federal Supply Class 1420 (Guided Missile Components) of the Guided Missiles group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1420-01-042-7900 |
| Primary Part Number | 639AS976 |
| Item Name | Block,cylinder and Post |
| FSC / FSG | 1420 / 14 — Guided Missile Components |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL,5.719 IN. O/A LG,4.684 IN. OD,COMPONENTS BLOCK 1,INSERT 4,PIN 4,POST 4,RING 4 IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 639AS976 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 588.10-300004-000 | 5/9 Secondary reference Diehl Defence Gmbh & Co. Kg |
NSN 1420-01-042-7900 is a Block,cylinder and Post, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 1420, Guided Missile Components. Status: active.
NSN 1420-01-042-7900 has 1 manufacturer part number on file: 639AS976 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 639AS976: General Characteristics Item Description: STEEL,5.719 IN. O/A LG,4.684 IN. OD,COMPONENTS BLOCK 1,INSERT 4,PIN 4,POST 4,RING 4 IN; End Item Identification: GUIDED MISSILE MODEL AIM-9L. 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 1420-01-042-7900 has DEMIL Code D. 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.