The Washer,flat, cataloged under National Stock Number 5310-00-038-0771, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Walworth Company. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-038-0771 |
| Primary Part Number | 10390-12-1 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Walworth Company |
| Status | ACTIVE |
| Overall Diameter | 1.234 INCHES NOMINAL IN |
| Material Document and Classification | W711,FSCM 98119 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | PLASTIC OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.750 INCHES NOMINAL IN |
| Thickness | 0.125 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 |
|---|---|
| N10508BPC12-1-2340D | The Walworth Company (USA) |
| 10390-12-1 PRIMARY | The Walworth Company (USA) |
| 10389-12-1 | The Walworth Company (USA) |
| N10508BPC12-1X1-4IN | The Walworth Company (USA) |
| D10389-12 | The Walworth Company (USA) |
| Reference | Meaning |
|---|---|
| N10508BPIECE12 | C/1 Advisory reference — outside the item-of-supply concept The Walworth Company |
NSN 5310-00-038-0771 is a Washer,flat, manufactured by The Walworth Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-038-0771 has 5 manufacturer part numbers on file: N10508BPC12-1-2340D (The Walworth Company), 10390-12-1 (The Walworth Company), 10389-12-1 (The Walworth Company), N10508BPC12-1X1-4IN (The Walworth Company), D10389-12 (The Walworth Company).
1 possible match (shared part number, not a government interchangeability claim): 5310-00-155-4339. Verify interchangeability with system specifications before substitution.
Key specifications for 10390-12-1: Overall Diameter: 1.234 INCHES NOMINAL IN; Material Document and Classification: W711,FSCM 98119 MFR REF SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND. 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.