The Block, cataloged under National Stock Number 2030-01-158-2155, is classified within Federal Supply Class 2030 (Deck Machinery) of the Ship and Marine Equipment 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 2030-01-158-2155 |
| Primary Part Number | 709-4684920 ITEM 4 |
| Item Name | Block |
| FSC / FSG | 2030 / 20 — Deck Machinery |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL QQ-S-766 CL 316 COND A; 2.500 IN. LG; 1.250 IN. H; 1.000 IN. W; 1 HOLE 90 DEGREES CSK TO 0.660 IN. DIA BOTH SIDES AND TAPPED 0.625-18 UNF-2B; 2 HOLES 0.406 IN. DIA,1.750 IN. CENTER TO CENTER PERPENDICULAR TO THREADED HOLE IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 709-4684920 ITEM 4 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 87832-1649 ITEM 4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 2030-01-158-2155 is a Block, manufactured by Naval Sea Systems Command, classified under FSC 2030, Deck Machinery. Status: active.
NSN 2030-01-158-2155 has 1 manufacturer part number on file: 709-4684920 ITEM 4 (Naval Sea Systems Command).
Key specifications for 709-4684920 ITEM 4: General Characteristics Item Description: STEEL QQ-S-766 CL 316 COND A; 2.500 IN. LG; 1.250 IN. H; 1.000 IN. W; 1 HOLE 90 DEGREES CSK TO 0.660 IN. DIA BOTH SIDES AND TAPPED 0.625-18 UNF-2B; 2 HOLES 0.406 IN. DIA,1.750 IN. CENTER TO CENTER PERPENDICULAR TO THREADED HOLE 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.