The Nut,operating,valve, cataloged under National Stock Number 5310-01-220-9255, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-220-9255 |
| Primary Part Number | 31141-N-160 |
| Item Name | Nut,operating,valve |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
| Status | ACTIVE |
| General Characteristics Item Description | CAST BRONZE MIL-B-16541;OD 2.062 IN.;O/A LG 3.062 IN.;1.371 IN.MAX TO 1.367 IN.MIN ACROSS HEX FLATS LARGE END,TOTAL TAPER 0.750 IN.PER 1.000 FT;0.875 IN.ID-0.167 IN.PITCH,0.333 IN.LEAD,NA-3G,LH THD;MINOR END 1.250 IN.-16 THD NS-3 G |
| 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 |
|---|---|
| 31141-N-160 PRIMARY | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA) |
| 1305-001 ITEM 4 4INCH | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA) |
| Reference | Meaning |
|---|---|
| 1305-001 | D/9 Drawing number reference only Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
| 31141-N | 5/9 Secondary reference Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
NSN 5310-01-220-9255 is a Nut,operating,valve, manufactured by Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-220-9255 has 2 manufacturer part numbers on file: 31141-N-160 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc), 1305-001 ITEM 4 4INCH (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc).
2 possible matches (shared part number, not a government interchangeability claim): 4730-01-255-2257, 5307-01-579-3037. Verify interchangeability with system specifications before substitution.
Key specifications for 31141-N-160: General Characteristics Item Description: CAST BRONZE MIL-B-16541;OD 2.062 IN.;O/A LG 3.062 IN.;1.371 IN.MAX TO 1.367 IN.MIN ACROSS HEX FLATS LARGE END,TOTAL TAPER 0.750 IN.PER 1.000 FT;0.875 IN.ID-0.167 IN.PITCH,0.333 IN.LEAD,NA-3G,LH THD;MINOR END 1.250 IN.-16 THD NS-3 G; End Item Identification: MILWAUKEE VALVE MODEL 1305 4.000 IN.GATE VALVE IN. 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.