The Cap,pipe, cataloged under National Stock Number 4730-01-186-8121, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy. Government technical data includes 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-186-8121 |
| Primary Part Number | 48-2-1/2 |
| Item Name | Cap,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy |
| Status | ACTIVE |
| Nominal Pipe Size for Which Designed | 2.500 INCHES IN |
| Connection Style | BEVELED |
| Style Designator | CAP |
| Material Document and Classification | ASTM A234-82A ASSN STD SINGLE MATERIAL RESPONSE OVERALL A |
| Specification/standard Data | 80204-ANSI B16.9 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Nondefinitive Spec/std Data | 8 TABLE |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 48-2-1/2 | Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy (USA) |
| Reference | Meaning |
|---|---|
| B16.9 | 3/1 Design control — primary reference U.S. Government activity |
| 1801-2-1/2 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-01-186-8121 is a Cap,pipe, manufactured by Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-186-8121 has 1 manufacturer part number on file: 48-2-1/2 (Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy).
2 possible matches (shared part number, not a government interchangeability claim): 4310-01-526-7845, 5331-01-533-5172. Verify interchangeability with system specifications before substitution.
Key specifications for 48-2-1/2: Nominal Pipe Size for Which Designed: 2.500 INCHES IN; Connection Style: BEVELED; Style Designator: CAP; Material Document and Classification: ASTM A234-82A ASSN STD SINGLE MATERIAL RESPONSE OVERALL A. 7 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.