The Washer,flat, cataloged under National Stock Number 5310-00-663-5239, 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 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-663-5239 |
| Primary Part Number | N10910REVCPC8 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Walworth Company |
| Status | ACTIVE |
| Overall Diameter | 1.625 INCHES NOMINAL IN |
| Hardness Rating | 110.0 ROCKWELL R MINIMUM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Nondefinitive Spec/std Data | A TYPE AND 2 GRADE AND H CLASS |
| Peripheral Shape Style | ROUND |
| Material | PLASTIC POLYAMIDE NYLON OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 1.172 INCHES NOMINAL IN |
| Thickness | 0.062 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 |
|---|---|
| N10910REVCPC8 PRIMARY | The Walworth Company (USA) |
| Reference | Meaning |
|---|---|
| FF-W-92 | 4/1 Identification reference U.S. Government activity |
| 53015 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5310-00-663-5239 is a Washer,flat, manufactured by The Walworth Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-663-5239 has 1 manufacturer part number on file: N10910REVCPC8 (The Walworth Company).
5 possible matches (shared part number, not a government interchangeability claim): 5360-01-027-5004, 5310-01-029-7967, 3110-01-230-3483. Verify interchangeability with system specifications before substitution.
Key specifications for N10910REVCPC8: Overall Diameter: 1.625 INCHES NOMINAL IN; Hardness Rating: 110.0 ROCKWELL R MINIMUM; Cross-Sectional Shape Style: RECTANGULAR; Nondefinitive Spec/std Data: A TYPE AND 2 GRADE AND H CLASS. 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.