The Washer,flat, cataloged under National Stock Number 5310-01-725-0463, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Ames Metal Products Company. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-725-0463 |
| Primary Part Number | PBDSK4.5X1 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Ames Metal Products Company |
| Status | ACTIVE |
| Overall Diameter | 4.485 INCHES MINIMUM AND 4.515 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM B29, ASTM B749, FED SPEC QQ-L-171E GRADE C AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | LEAD OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.383 INCHES MINIMUM AND 0.399 INCHES MAXIMUM IN |
| Thickness | 0.99 INCHES MINIMUM AND 1.01 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 |
|---|---|
| 90385K34 | Mcmaster-Carr Supply Co (USA) |
| PBDSK4.5X1 PRIMARY | Ames Metal Products Company (USA) |
| Reference | Meaning |
|---|---|
| 8596343 FIND 10 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
NSN 5310-01-725-0463 is a Washer,flat, manufactured by Ames Metal Products Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-725-0463 has 2 manufacturer part numbers on file: 90385K34 (Mcmaster-Carr Supply Co), PBDSK4.5X1 (Ames Metal Products Company).
Key specifications for PBDSK4.5X1: Overall Diameter: 4.485 INCHES MINIMUM AND 4.515 INCHES MAXIMUM IN; Material Document and Classification: ASTM B29, ASTM B749, FED SPEC QQ-L-171E GRADE C AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Special Features: FABRICATION METHOD IS CAST; REACH (EC 1907/2006) (01/17/2022, 223 SVHC) COMPLIANT; SPECIALTY METALS COTS-EXEMPT; SCHEDULE B 780600.0300. 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.