The Pin,piston, cataloged under National Stock Number 4310-00-273-8558, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions. Government technical data includes 15 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through both NSN and commercial part number lookups. 35 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4310-00-273-8558 |
| Primary Part Number | 18N |
| Item Name | Pin,piston |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| Status | ACTIVE |
| Countersink Angle in Deg | 45.0 |
| FSC Application Data | AIR COMPRESSOR |
| Body Style | CHAMFERED ENDS |
| Hole Arrangement Style | ONE HOLE THRU ONE SIDE OF BORE |
| Bore Style | INSIDE CHAMFER STRAIGHT-THRU BORE |
| Hole Depth | 0.1870 INCHES NOMINAL IN |
| Material Document and Classification | MIL-S-16974, GRADE 1023W MIL SPEC SINGLE MATERIAL RESPONSE W |
| Outside Diameter | 0.99970 INCHES MINIMUM AND 0.99990 INCHES MAXIMUM IN |
| End Chamfer Angle in Deg | 45.0 |
| Body Length | 3.8750 INCHES NOMINAL IN |
| Casehardening Indicator | CASEHARDENED |
| Bore Diameter | 0.6250 INCHES NOMINAL IN |
| Material | STEEL COMP 1023W W |
| Distance From Centerline of Hole to End of Pin | 0.563 INCHES NOMINAL IN |
| Hole Diameter | 0.2570 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 |
|---|---|
| 18N PRIMARY | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| HL6189PC46 | 5/9 Secondary reference U.S. Government activity |
| HL4875PC46 | 5/9 Secondary reference U.S. Government activity |
| 18N | 3/9 Design control — primary reference Siemens Energy, Inc. Dba Dresser-Rand |
| HL6179PC46 | 5/9 Secondary reference U.S. Government activity |
| HL4567PC46 | 5/9 Secondary reference U.S. Government activity |
| HL3831PC46 | 5/9 Secondary reference U.S. Government activity |
| HL4714PC46 | 5/9 Secondary reference U.S. Government activity |
| HL7119PC46 | 5/9 Secondary reference U.S. Government activity |
| HL11461PC86 | 5/9 Secondary reference U.S. Government activity |
| HL4444PC46 | 5/9 Secondary reference U.S. Government activity |
| HL11472SH1PC86 | 5/9 Secondary reference U.S. Government activity |
| HL7112PC46 | 5/9 Secondary reference U.S. Government activity |
| HL6064PC46 | 5/9 Secondary reference U.S. Government activity |
| 18N | 5/9 Secondary reference U.S. Government activity |
| HL3834PC46 | 5/9 Secondary reference U.S. Government activity |
| PIN30 | 5/9 Secondary reference U.S. Government activity |
| HL6074PC46 | 5/9 Secondary reference U.S. Government activity |
| HL4878PC46 | 5/9 Secondary reference U.S. Government activity |
| HL4558PC46 | 5/9 Secondary reference U.S. Government activity |
| HL5533PC46 | 5/9 Secondary reference U.S. Government activity |
NSN 4310-00-273-8558 is a Pin,piston, manufactured by Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-00-273-8558 has 1 manufacturer part number on file: 18N (Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions).
Key specifications for 18N: Countersink Angle in Deg: 45.0; FSC Application Data: AIR COMPRESSOR; Body Style: CHAMFERED ENDS; Hole Arrangement Style: ONE HOLE THRU ONE SIDE OF BORE. 15 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.