The Thread Piece,union, cataloged under National Stock Number 4730-00-554-9874, 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 Pre-Mach Inc. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-554-9874 |
| Primary Part Number | A316277-7 |
| Item Name | Thread Piece,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Pre-Mach Inc |
| Status | ACTIVE |
| Union End Thread Direction | RIGHT-HAND |
| Material Hardness Rating | 92.0 ROCKWELL B MINIMUM AND 98.0 ROCKWELL B MAXIMUM |
| End Connection Type | THREADED |
| Union End Thread Size | 2-3/8IN-12 IN |
| Seat Type | STRAIGHT FACE |
| Thread Direction | RIGHT-HAND |
| Thread Size | 1-7/8-12N |
| Screw Thread Series Designator | UN |
| Union End Screw Thread Series Designator | UN |
| Screw Thread Location | EXTERNAL |
| Material | STEEL COMP 4130 |
| Working Pressure and Service Type | 4000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL WATER LBS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| A316277-7 | Pre-Mach Inc (USA) |
| A316277-7 | Airtronics, Llc (USA) |
| A316277-7 | Ammcon Corp. (USA) |
| A316277-7 | Duhadaway Tool & Die Shop Inc (USA) |
| A316277-7 | Nassau Tool Works, Inc (USA) |
| A316277-7 | Krobach Mfg. Corp. Dba Krobach Manufacturing Corp (USA) |
| A316277-7 | Bec Systems Llc Dba Bec Machine Products (USA) |
| Reference | Meaning |
|---|---|
| A316277-7 | 5/9 Secondary reference Nuflo, Inc. |
| A316277-7 | 5/9 Secondary reference Master Research & Manufacturing, Inc. Dba Master Research & Manufacturing Inc |
| A316277-7 | 5/9 Secondary reference Computa-Base-Machining, Inc. |
| A316277-7 | 5/9 Secondary reference Fluidyne Corporation Dba Fluidyne Corp |
| A316277-7 | 5/9 Secondary reference Calabrese & Sons, Inc. |
| A316277-7 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-00-554-9874 is a Thread Piece,union, manufactured by Pre-Mach Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-554-9874 has 7 manufacturer part numbers on file: A316277-7 (Pre-Mach Inc), A316277-7 (Airtronics, Llc), A316277-7 (Ammcon Corp.), A316277-7 (Duhadaway Tool & Die Shop Inc), A316277-7 (Nassau Tool Works, Inc) and 2 more.
Key specifications for A316277-7: Union End Thread Direction: RIGHT-HAND; Material Hardness Rating: 92.0 ROCKWELL B MINIMUM AND 98.0 ROCKWELL B MAXIMUM; End Connection Type: THREADED; Union End Thread Size: 2-3/8IN-12 IN. 12 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.