The Washer,lock, cataloged under National Stock Number 5310-01-641-8928, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is American Disc Lock. Government technical data includes 7 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. 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 | 5310-01-641-8928 |
| Primary Part Number | GDP-105 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | American Disc Lock |
| Status | ACTIVE |
| Surface Treatment Document and Classification | DELTA PROTEKT,MIN 600 HOURS SALT SPRAY,SILVER MATTE MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM |
| Style Designator | TWO PIECE INTERLOCKING |
| Outside Diameter | 0.937 INCHES NOMINAL IN |
| Color | SILVER OVERALL |
| Material | STEEL COMP 1010 OVERALL |
| Hole Diameter | 0.510 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 |
|---|---|
| GDP-105 PRIMARY | American Disc Lock (USA) |
NSN 5310-01-641-8928 is a Washer,lock, manufactured by American Disc Lock, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-641-8928 has 1 manufacturer part number on file: GDP-105 (American Disc Lock).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-664-7629. Verify interchangeability with system specifications before substitution.
Key specifications for GDP-105: Overall Height: 0.166 INCHES NOMINAL IN; Surface Treatment Document and Classification: DELTA PROTEKT,MIN 600 HOURS SALT SPRAY,SILVER MATTE MFR REF SINGLE TREATMENT RESPONSE OVERALL; Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM; Style Designator: TWO PIECE INTERLOCKING. 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.