The Grommet,nonmetallic, cataloged under National Stock Number 5325-01-182-9166, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Seron Manufacturing Company Inc. Government technical data includes 8 specifications, 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-182-9166 |
| Primary Part Number | 4M277-4 |
| Item Name | Grommet,nonmetallic |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Seron Manufacturing Company Inc |
| Status | ACTIVE |
| Grommet Style | ROUND |
| Flange Thickness | 0.062 INCHES NOMINAL IN |
| Large Flange Outside Diameter | 0.470 INCHES NOMINAL IN |
| Color | BLACK OVERALL |
| Groove Outside Diameter | 0.340 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Grommet Construction Type | SOLID |
| Material | PLASTIC POLYAMIDE NYLON OVERALL |
| Hole Diameter | 0.250 INCHES NOMINAL IN |
| 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 |
|---|---|
| 4M277-4 PRIMARY | Seron Manufacturing Company Inc (USA) |
| 2030 | Heyco Inc Dba Heyco Products (USA) |
| Reference | Meaning |
|---|---|
| A3006813-1 | 7/2 Vendor item drawing reference U.S. Government activity |
| 4M277-4 | 5/9 Secondary reference The Boeing Company Div Defense |
| 14016-020 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 14016-020 | C/1 Advisory reference — outside the item-of-supply concept Clayton Manufacturing Company |
NSN 5325-01-182-9166 is a Grommet,nonmetallic, manufactured by Seron Manufacturing Company Inc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-182-9166 has 2 manufacturer part numbers on file: 4M277-4 (Seron Manufacturing Company Inc), 2030 (Heyco Inc Dba Heyco Products).
Key specifications for 4M277-4: Overall Height: 0.410 INCHES NOMINAL IN; Grommet Style: ROUND; Flange Thickness: 0.062 INCHES NOMINAL IN; Large Flange Outside Diameter: 0.470 INCHES NOMINAL IN. 8 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.