The Washer,flat, cataloged under National Stock Number 5310-01-133-3914, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Matthew Warren, Inc Dba Raf Electronic Hardware Div Raf Electronic Hardware, Llc. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-133-3914 |
| Primary Part Number | 1057-SS |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Matthew Warren, Inc Dba Raf Electronic Hardware Div Raf Electronic Hardware, Llc |
| Status | ACTIVE |
| Overall Diameter | 0.168 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL CORROSION RESISTING OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.090 INCHES MINIMUM AND 0.096 INCHES MAXIMUM IN |
| Thickness | 0.007 INCHES MINIMUM AND 0.013 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 |
|---|---|
| 1057-SS PRIMARY | Matthew Warren, Inc Dba Raf Electronic Hardware Div Raf Electronic Hardware, Llc (USA) |
| Reference | Meaning |
|---|---|
| 7109226-001 | 7/2 Vendor item drawing reference U.S. Government activity |
| 7109226 | 7/2 Vendor item drawing reference U.S. Government activity |
| 1057 | 5/9 Secondary reference Matthew Warren, Inc Dba Raf Electronic Hardware Div Raf Electronic Hardware, Llc |
| 10109676 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5310-01-133-3914 is a Washer,flat, manufactured by Matthew Warren, Inc Dba Raf Electronic Hardware Div Raf Electronic Hardware, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-133-3914 has 1 manufacturer part number on file: 1057-SS (Matthew Warren, Inc Dba Raf Electronic Hardware Div Raf Electronic Hardware, Llc).
1 possible match (shared part number, not a government interchangeability claim): 4940-01-480-3561. Verify interchangeability with system specifications before substitution.
Key specifications for 1057-SS: Overall Diameter: 0.168 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN; Cross-Sectional Shape Style: RECTANGULAR; Special Features: SPLIT THROUGH HALF OF WASHER; Peripheral Shape Style: ROUND. 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.