The Screw,adjusting,valve Tappet, cataloged under National Stock Number 2815-00-718-4764, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Stanadyne/chicago Div. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2815-00-718-4764 |
| Primary Part Number | HS98 |
| Item Name | Screw,adjusting,valve Tappet |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Manufacturer | Stanadyne/chicago Div |
| Status | ACTIVE |
| Material | STEEL |
| 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 |
|---|---|
| HS98 PRIMARY | Stanadyne/chicago Div (USA) |
| 40-0017301 PRIMARY | Brinkley Technology Group Llc Dba Hercules Manufacturing (USA) |
| Reference | Meaning |
|---|---|
| 40-0017301 | 5/9 Secondary reference Hercules Engine Co Inc |
| 40-0017301B | C/1 Advisory reference — outside the item-of-supply concept Hercules Engine Co Inc |
| 255078B | 5/9 Secondary reference Hercules Engine Co Inc |
| 255078A | 5/9 Secondary reference Hercules Engine Co Inc |
| 255078 | 5/9 Secondary reference Hercules Engine Co Inc |
| N2-585 | 5/9 Secondary reference Stanadyne/chicago Div |
| P1174 | 5/9 Secondary reference Bogue Electric Manufacturing Co |
NSN 2815-00-718-4764 is a Screw,adjusting,valve Tappet, manufactured by Stanadyne/chicago Div, classified under FSC 2815, Diesel Engines and Components. Status: active.
NSN 2815-00-718-4764 has 2 manufacturer part numbers on file: HS98 (Stanadyne/chicago Div), 40-0017301 (Brinkley Technology Group Llc Dba Hercules Manufacturing).
1 possible match (shared part number, not a government interchangeability claim): 5930-01-017-2230. Verify interchangeability with system specifications before substitution.
Key specifications for HS98: Special Features: 1.125 IN. LG O/A;HEX HEAD 0.500 IN. WD ACROSS FLATS,0.219 IN. THK,HEAD CONCAVED 0.438 IN. WD BY 0.125 IN. DEEP;THD DATA 0.375-24 UNF,0.500 IN. THD LG,EXTERNAL RELIEVED BODY 0.188 IN. DIA BY 0.156 IN. LG;THD DATA 0.375-24 UNF BY 0.250 IN. LG;THD END INTERNALLY RELIEVED BODY 0.188 IN. ID BY 0.188 IN. DEEP,0.125 IN. ID BY 0.500 IN. DEEP,0.078 IN. ID BY 0.250 IN. DEEP IN; Material: STEEL. 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.