The Washer,flat, cataloged under National Stock Number 5310-01-556-5515, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Nd Defense Llc. Government technical data includes 7 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-556-5515 |
| Primary Part Number | 30327R1 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Nd Defense Llc |
| Status | ACTIVE |
| Overall Diameter | 21.0 MILLIMETERS NOMINAL MM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 11.2 MILLIMETERS NOMINAL MM |
| Thickness | 2.7 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| 30327R1 PRIMARY | Nd Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| ESP-FM-16.101-GS | D/9 Drawing number reference only Nd Defense Llc |
| ESP-FM-16.121-PP | D/9 Drawing number reference only Nd Defense Llc |
| 30327R1 | 5/9 Secondary reference Asf Logistics, Llc |
NSN 5310-01-556-5515 is a Washer,flat, manufactured by Nd Defense Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-556-5515 has 1 manufacturer part number on file: 30327R1 (Nd Defense Llc).
4 possible matches (shared part number, not a government interchangeability claim): 3460-01-565-0407, 5310-01-567-0382, 5310-01-567-1388. Verify interchangeability with system specifications before substitution.
Key specifications for 30327R1: Overall Diameter: 21.0 MILLIMETERS NOMINAL MM; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Part Name Assigned by Controlling Agency: WASHER, 10.8 X 21 X 2.5MM MM. 7 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.