The Collar,shaft, cataloged under National Stock Number 3040-01-134-3604, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 12 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-134-3604 |
| Primary Part Number | 810-2178000-5 ITEM 14 |
| Item Name | Collar,shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Countersink Major Diameter and Location | 0.4000 INCHES NOMINAL ALL HOLES IN |
| Securing Hole Type and Location | THREADED-COUNTERSUNK ALL HOLES |
| Material Document and Classification | MIL-S-20166 MIL SPEC SINGLE MATERIAL RESPONSE |
| Screw Thread Series Designator and Location | ALL HOLES UNIFIED NATIONAL COARSE (UNC) |
| Outside Diameter | 4.5000 INCHES NOMINAL IN |
| Countersunk Hole Angle in Deg and Location | 90.0 ALL HOLES |
| Nominal Thread Size | 0.375 INCHES ALL HOLES IN |
| Angle Between Centerlines of Securing Holes in Deg | 180.0 |
| Securing Hole Quantity | 2 |
| Bore Diameter | 2.7500 INCHES NOMINAL IN |
| Material | STEEL COMP 1022 OR STEEL COMP 8620 |
| Thickness | 1.5625 INCHES NOMINAL 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 |
|---|---|
| 810-2178000-5 ITEM 14 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 810-2178000-5 I | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 810-2178000 | D/9 Drawing number reference only U.S. Government activity |
NSN 3040-01-134-3604 is a Collar,shaft, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-134-3604 has 1 manufacturer part number on file: 810-2178000-5 ITEM 14 (Naval Sea Systems Command).
4 possible matches (shared part number, not a government interchangeability claim): 4810-01-138-2957, 5305-01-155-7920, 4730-01-164-9714. Verify interchangeability with system specifications before substitution.
Key specifications for 810-2178000-5 ITEM 14: Countersink Major Diameter and Location: 0.4000 INCHES NOMINAL ALL HOLES IN; Securing Hole Type and Location: THREADED-COUNTERSUNK ALL HOLES; Material Document and Classification: MIL-S-20166 MIL SPEC SINGLE MATERIAL RESPONSE; Screw Thread Series Designator and Location: ALL HOLES UNIFIED NATIONAL COARSE (UNC). 12 specifications are 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.