The Washer,flat, cataloged under National Stock Number 5310-00-010-4635, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-010-4635 |
| Primary Part Number | 483138 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES BOTTOM |
| Surface Finish | 63.0 MICROINCHES TOP |
| Surface Treatment Document and Classification | QQ-N-290 FED SPEC 1ST TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN |
| Material Document and Classification | PWA1037 FSCM 77445 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | NICKEL OVERALL |
| Peripheral Shape Style | ROUND |
| Material | COBALT ALLOY OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.529 INCHES MINIMUM AND 0.533 INCHES MAXIMUM IN |
| Thickness | 0.029 INCHES MINIMUM AND 0.031 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 |
|---|---|
| 00354 | Defense Logistics Agency Dba Defense Supply Center Philadelphia (USA) |
| 483138 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 483138 | C/1 Advisory reference — outside the item-of-supply concept Paradigm Manchester Inc. Dba Pursuit Aerospace |
| 483138 | 5/9 Secondary reference Dynamic Gunver Technologies Llc |
NSN 5310-00-010-4635 is a Washer,flat, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-010-4635 has 2 manufacturer part numbers on file: 00354 (Defense Logistics Agency Dba Defense Supply Center Philadelphia), 483138 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 483138: Surface Finish: 63.0 MICROINCHES BOTTOM; Surface Finish: 63.0 MICROINCHES TOP; Surface Treatment Document and Classification: QQ-N-290 FED SPEC 1ST TREATMENT RESPONSE OVERALL; Overall Diameter: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN. 12 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.