The Washer,flat, cataloged under National Stock Number 5310-01-188-6745, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Anillo Industries Llc. Government technical data includes 10 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-188-6745 |
| Primary Part Number | AS66-T1/4H |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Anillo Industries Llc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-T-9047 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.495 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Peripheral Shape Style | ROUND |
| Material | TITANIUM ALLOY OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.265 INCHES NOMINAL 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 |
|---|---|
| AS66-T1/4H PRIMARY | Anillo Industries Llc (USA) |
| Reference | Meaning |
|---|---|
| 7688-50923-007 | 7/2 Vendor item drawing reference Raytheon Company |
| 7688-50923-007 | 5/9 Secondary reference Hughes Missile Systems Co San Diego |
| NS202368-4-3 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-188-6745 is a Washer,flat, manufactured by Anillo Industries Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-188-6745 has 1 manufacturer part number on file: AS66-T1/4H (Anillo Industries Llc).
Key specifications for AS66-T1/4H: Surface Treatment Document and Classification: MIL-T-9047 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.495 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN; Material Document and Classification: AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 10 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.