The Collar,shaft, cataloged under National Stock Number 3040-00-689-5158, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Astronautics Corporation of America. Government technical data includes 11 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. 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 | 3040-00-689-5158 |
| Primary Part Number | 100998 |
| Item Name | Collar,shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Astronautics Corporation of America |
| Status | ACTIVE |
| Securing Hole Type and Location | THREADED ALL HOLES |
| Style Designator | PLAIN ROUND |
| Screw Thread Series Designator and Location | ALL HOLES UNIFIED NATIONAL COARSE (UNC) |
| Outside Diameter | 0.375 INCHES NOMINAL IN |
| Nominal Thread Size | 0.112 INCHES ALL HOLES IN |
| Angle Between Centerlines of Securing Holes in Deg | 120.0 |
| Securing Hole Quantity | 4 |
| Surface Treatment | PASSIVATE |
| Bore Diameter | 0.1250 INCHES MINIMUM AND 0.1875 INCHES MAXIMUM IN |
| Material | STEEL CORROSION RESISTING |
| Thickness | 0.312 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 100998 PRIMARY | Astronautics Corporation of America (USA) |
NSN 3040-00-689-5158 is a Collar,shaft, manufactured by Astronautics Corporation of America, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-689-5158 has 1 manufacturer part number on file: 100998 (Astronautics Corporation of America).
4 possible matches (shared part number, not a government interchangeability claim): 4820-00-719-7011, 2915-00-757-0146, 3825-00-846-7993. Verify interchangeability with system specifications before substitution.
Key specifications for 100998: Securing Hole Type and Location: THREADED ALL HOLES; Style Designator: PLAIN ROUND; Screw Thread Series Designator and Location: ALL HOLES UNIFIED NATIONAL COARSE (UNC); Outside Diameter: 0.375 INCHES NOMINAL IN. 11 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.
NSN 3040-00-689-5158 has DEMIL Code Q. 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.