The Washer,flat, cataloged under National Stock Number 5310-01-151-0221, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Mercer Rubber Company Dba Mercer Gasket & Shim Div Mercer Rubber Co., Inc. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-151-0221 |
| Primary Part Number | 39-17641-5 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mercer Rubber Company Dba Mercer Gasket & Shim Div Mercer Rubber Co., Inc |
| Status | ACTIVE |
| Overall Diameter | 0.625 INCHES MINIMUM AND 0.646 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | TITANIUM OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.250 INCHES MINIMUM AND 0.261 INCHES MAXIMUM IN |
| Thickness | 0.063 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 |
|---|---|
| 39-17641-5 | Mercer Rubber Company Dba Mercer Gasket & Shim Div Mercer Rubber Co., Inc (USA) |
| 39-17641-5 | Gardner Denver Nash Llc Dba Gardner Denver Engineered Products Group Div Gardner Denver Nash (USA) |
| 39-17641-5 | North Coast Seal Inc (USA) |
| 39-17641-5 | Metro Industries Inc (USA) |
| 39-17641-5 | Accutrex Products Inc Div Headquarters (USA) |
| 39-17641-5 | Excelsior, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 39-17641-5 | 5/2 Secondary reference U.S. Government activity |
| 39-17641-5 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-151-0221 is a Washer,flat, manufactured by Mercer Rubber Company Dba Mercer Gasket & Shim Div Mercer Rubber Co., Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-151-0221 has 6 manufacturer part numbers on file: 39-17641-5 (Mercer Rubber Company Dba Mercer Gasket & Shim Div Mercer Rubber Co., Inc), 39-17641-5 (Gardner Denver Nash Llc Dba Gardner Denver Engineered Products Group Div Gardner Denver Nash), 39-17641-5 (North Coast Seal Inc), 39-17641-5 (Metro Industries Inc), 39-17641-5 (Accutrex Products Inc Div Headquarters) and 1 more.
Key specifications for 39-17641-5: Overall Diameter: 0.625 INCHES MINIMUM AND 0.646 INCHES MAXIMUM IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Material: TITANIUM OVERALL. 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.