The Coupling,double,fir, cataloged under National Stock Number 4210-00-488-8402, is classified within Federal Supply Class 4210 (Firefighting Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. The manufacturer of record is Elkhart Brass Manufacturing Company, Llc Div Elkhart Brass Manufacturing Company. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Coupling,double,fir |
| FSC / FSG | 4210 — Firefighting Equipment (FSG 42) |
| Manufacturers | Rhba Acquisitions, Llc Dba Red Head Brass (CAGE 8T694); Elkhart Brass Manufacturing Company, Llc Div Elkhart Brass Manufacturing Company (CAGE 20266) |
| Parameter | Value |
|---|---|
| NSN | 4210-00-488-8402 |
| Primary Part Number | F-327A |
| Item Name | Coupling,double,fir |
| FSC / FSG | 4210 / 42 — Firefighting Equipment |
| Manufacturer | Elkhart Brass Manufacturing Company, Llc Div Elkhart Brass Manufacturing Company |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Part Number | Manufacturer |
|---|---|
| STYLE 35 | Rhba Acquisitions, Llc Dba Red Head Brass (USA) |
| F-327A PRIMARY | Elkhart Brass Manufacturing Company, Llc Div Elkhart Brass Manufacturing Company (USA) |
| Reference | Meaning |
|---|---|
| B3 | 5/9 Secondary reference Halprin Supply Co |
| B3A | 3/9 Design control — primary reference Halprin Supply Co |
NSN 4210-00-488-8402 is a Coupling,double,fir, manufactured by Elkhart Brass Manufacturing Company, Llc Div Elkhart Brass Manufacturing Company, classified under FSC 4210, Firefighting Equipment. Status: active.
NSN 4210-00-488-8402 has 2 manufacturer part numbers on file: STYLE 35 (Rhba Acquisitions, Llc Dba Red Head Brass), F-327A (Elkhart Brass Manufacturing Company, Llc Div Elkhart Brass Manufacturing Company).
3 possible matches (shared part number, not a government interchangeability claim): 5977-00-988-1022, 5930-01-514-8015, 6515-01-640-9708. Verify interchangeability with system specifications before substitution.
Possible hazard — SDS may be required (DLA HMIC P). 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.