The Collar,shaft, cataloged under National Stock Number 3040-01-181-8508, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 27 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-181-8508 |
| Item Name | Collar,shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Countersink Major Diameter and Location | 0.7900 INCHES NOMINAL 2ND HOLE IN |
| Countersink Major Diameter and Location | 0.7900 INCHES NOMINAL 3RD HOLE IN |
| Countersink Major Diameter and Location | 0.7900 INCHES NOMINAL 5TH HOLE IN |
| Securing Hole Type and Location | THREADED-COUNTERSUNK 2ND HOLE |
| Securing Hole Type and Location | THREADED-COUNTERSUNK 3RD HOLE |
| Securing Hole Type and Location | THREADED-COUNTERSUNK 6TH HOLE |
| Securing Hole Type and Location | UNTHREADED 1ST HOLE |
| Securing Hole Type and Location | UNTHREADED 4TH HOLE |
| Securing Hole Type and Location | UNTHREADED 5TH HOLE |
| Style Designator | ROUND SECTIONAL |
| Material Document and Classification | QQ-N-286, CLASS A FED SPEC SINGLE MATERIAL RESPONSE |
| Screw Thread Series Designator and Location | 2ND HOLE UNIFIED NATIONAL COARSE (UNC) |
| Screw Thread Series Designator and Location | 3RD HOLE UNIFIED NATIONAL COARSE (UNC) |
| Screw Thread Series Designator and Location | 6TH HOLE UNIFIED NATIONAL COARSE (UNC) |
| Outside Diameter | 8.000 INCHES NOMINAL IN |
| Hole Diameter and Location | 0.8120 INCHES NOMINAL 1ST HOLE IN |
| Hole Diameter and Location | 0.8120 INCHES NOMINAL 4TH HOLE IN |
| Hole Diameter and Location | 0.8120 INCHES NOMINAL 5TH HOLE IN |
| Countersunk Hole Angle in Deg and Location | 90.0 2ND HOLE |
| Countersunk Hole Angle in Deg and Location | 90.0 3RD HOLE |
| Countersunk Hole Angle in Deg and Location | 90.0 6TH HOLE |
| Nominal Thread Size | 0.750 INCHES THREAD IN |
| Angle Between Centerlines of Securing Holes in Deg | 180.0 |
| Securing Hole Quantity | 6 |
| Bore Diameter | 4.3050 INCHES NOMINAL IN |
| Material | NICKEL ALLOY K-500 |
| Thickness | 4.000 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 |
| Reference | Meaning |
|---|---|
| 4674725-0008 | 3/2 Design control — primary reference U.S. Government activity |
| 4674725 ITEM 8 | 5/2 Secondary reference U.S. Government activity |
| 4674725 | D/9 Drawing number reference only U.S. Government activity |
NSN 3040-01-181-8508 is a Collar,shaft, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-01-181-8508: Countersink Major Diameter and Location: 0.7900 INCHES NOMINAL 2ND HOLE IN; Countersink Major Diameter and Location: 0.7900 INCHES NOMINAL 3RD HOLE IN; Countersink Major Diameter and Location: 0.7900 INCHES NOMINAL 5TH HOLE IN; Securing Hole Type and Location: THREADED-COUNTERSUNK 2ND HOLE. 27 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.