The Washer,flat, cataloged under National Stock Number 5310-01-529-2103, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Honeywell International Inc. Div Aerospace - Torrance. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-529-2103 |
| Primary Part Number | S8157N396-063T |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Honeywell International Inc. Div Aerospace - Torrance |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-T-10727, TYPE I FUSED 0.0003 MIN THICKNESS MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.400 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN |
| Material Document and Classification | MIL-S-6721 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-7720 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | TIN OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 316 OR STEEL COMP 321 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.165 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN |
| Thickness | 0.058 INCHES MINIMUM AND 0.068 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 |
|---|---|
| S8157N396-063T PRIMARY | Honeywell International Inc. Div Aerospace - Torrance (USA) |
NSN 5310-01-529-2103 is a Washer,flat, manufactured by Honeywell International Inc. Div Aerospace - Torrance, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-529-2103 has 1 manufacturer part number on file: S8157N396-063T (Honeywell International Inc. Div Aerospace - Torrance).
Key specifications for S8157N396-063T: Surface Treatment Document and Classification: MIL-T-10727, TYPE I FUSED 0.0003 MIN THICKNESS MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.400 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN; Material Document and Classification: MIL-S-6721 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-7720 MIL SPEC 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.