The Washer,flat, cataloged under National Stock Number 5310-01-178-3981, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sypris Electronics, Llc Div Sypris Electronics, Llc - Colorado Field Services. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-178-3981 |
| Primary Part Number | 16610336-001 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sypris Electronics, Llc Div Sypris Electronics, Llc - Colorado Field Services |
| Status | ACTIVE |
| Overall Diameter | 0.845 INCHES MINIMUM AND 0.905 INCHES MAXIMUM IN |
| Hardness Rating | 70.0 SHORE DUROMETER A NOMINAL |
| Material Document and Classification | ZZ-R-765,CLASS 2A,GRADE 70 FED SPEC SINGLE MATERIAL RESPONSE OVERALL A |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | RUBBER OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.470 INCHES MINIMUM AND 0.530 INCHES MAXIMUM IN |
| Thickness | 0.203 INCHES MINIMUM AND 0.219 INCHES MAXIMUM 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 |
|---|---|
| 16610336-001 PRIMARY | Sypris Electronics, Llc Div Sypris Electronics, Llc - Colorado Field Services (USA) |
NSN 5310-01-178-3981 is a Washer,flat, manufactured by Sypris Electronics, Llc Div Sypris Electronics, Llc - Colorado Field Services, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-178-3981 has 1 manufacturer part number on file: 16610336-001 (Sypris Electronics, Llc Div Sypris Electronics, Llc - Colorado Field Services).
Key specifications for 16610336-001: Overall Diameter: 0.845 INCHES MINIMUM AND 0.905 INCHES MAXIMUM IN; Hardness Rating: 70.0 SHORE DUROMETER A NOMINAL; Material Document and Classification: ZZ-R-765,CLASS 2A,GRADE 70 FED SPEC SINGLE MATERIAL RESPONSE OVERALL A; Cross-Sectional Shape Style: RECTANGULAR. 9 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.