The Washer,lock, cataloged under National Stock Number 5310-01-680-5255, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 5 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-680-5255 |
| Primary Part Number | 12569633-25 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Material Document and Classification | ASMEB18.21.2M ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Outside Diameter | 18.03 MILLIMETERS MAXIMUM MM |
| Material Thickness | 2.92 MILLIMETERS NOMINAL MM |
| Material | STEEL OVERALL |
| Hole Diameter | 10.0 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| 12569633-25 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 5310-01-680-5255 is a Washer,lock, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-680-5255 has 1 manufacturer part number on file: 12569633-25 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12569633-25: Material Document and Classification: ASMEB18.21.2M ASSN STD ALL MATERIAL RESPONSES OVERALL; Outside Diameter: 18.03 MILLIMETERS MAXIMUM MM; Material Thickness: 2.92 MILLIMETERS NOMINAL MM; Special Features: APPLICABLE STANDARDS/ SPECIFICATIONS: A. ASME Y14.100 B. ASME Y14.5M-1994; IEE/ASTM S1 10 APPLIES. ANNEX B SHALL BE USED IN CONVERTING AND ROUNDING OOFF 1 INCH = 25.4MM APPLIES; WASHER SHALL BE IN ACCORDANCE WITH ALL REQUIREMENTS AS SPECIFIED FOR HARDENED CARBON STEEL LOCK WASHERS AS SPECIFIED IN ASME B18.21.2M WITH THE EXCEPTION OF THE PROTECTIVE FINISH SPECIFIED HEREON; PROTECTIVE FINISH: FINISH PER THICKNESS CODE 1 OF FASTENER FINISH SPECIFICATION DRAWING 12569600; DIMENSIONAL LIMITS APPLY AFTER PLATING. MM. 5 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.