The Nipple,pipe, cataloged under National Stock Number 4730-01-254-0168, 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 Swagelok Co. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-254-0168 |
| Primary Part Number | SS-4-HLN-3.5 |
| Item Name | Nipple,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Swagelok Co |
| Status | ACTIVE |
| Connection Style | PLAIN (PIPE) ALL ENDS |
| Nominal Overall Length | 3.500 INCHES IN |
| Connection Type | THREADED EXTERNAL PIPE ALL ENDS |
| Style Designator | CENTER WRENCHING FACILITY |
| Nominal Thread Size | 0.250 INCHES ALL ENDS IN |
| Material | STEEL COMP 316 OVERALL |
| Thread Series Designator | NPT ALL ENDS |
| 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 |
|---|---|
| SS4-1HLN3.5 | Tylok International, Inc. (USA) |
| SS-4-HLN-3.5 PRIMARY | Swagelok Co (USA) |
| 227B7441-2 | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems (USA) |
| 4-4 MHLN-SS 3.5 | Parker-Hannifin Corporation Div Instrumentation Products Division (USA) |
| Reference | Meaning |
|---|---|
| 227B7441 | 7/1 Vendor item drawing reference General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems |
| 4-4MHLN3.5SS | 5/9 Secondary reference Parker-Hannifin Corporation Div Instrumentation Products Division |
| SS-4-HLN-3.5 | 5/9 Secondary reference Cajon Co |
NSN 4730-01-254-0168 is a Nipple,pipe, manufactured by Swagelok Co, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-254-0168 has 4 manufacturer part numbers on file: SS4-1HLN3.5 (Tylok International, Inc.), SS-4-HLN-3.5 (Swagelok Co), 227B7441-2 (General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems), 4-4 MHLN-SS 3.5 (Parker-Hannifin Corporation Div Instrumentation Products Division).
Key specifications for SS-4-HLN-3.5: Connection Style: PLAIN (PIPE) ALL ENDS; Nominal Overall Length: 3.500 INCHES IN; Connection Type: THREADED EXTERNAL PIPE ALL ENDS; Style Designator: CENTER WRENCHING FACILITY. 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.