The Washer,flat, cataloged under National Stock Number 5310-00-231-1952, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Meritor Heavy Vehicle Systems, Llc. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-231-1952 |
| Primary Part Number | WA-FR26-1 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Meritor Heavy Vehicle Systems, Llc |
| Status | ACTIVE |
| Overall Diameter | 2.375 INCHES NOMINAL IN |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | WOOL COMP 9R2 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 1.625 INCHES NOMINAL IN |
| Thickness | 0.500 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 |
|---|---|
| WAFR26 | Meritor Industrial Products, Llc (USA) |
| WA-FR26-1 PRIMARY | Meritor Heavy Vehicle Systems, Llc (USA) |
| 131791 PRIMARY | Cnh Industrial America Llc Dba Cnh America (USA) |
| WAFR261 PRIMARY | Meritor Heavy Vehicle Systems, Llc (USA) |
| L31791 | Cnh Industrial America Llc Dba Cnh America (USA) |
| Reference | Meaning |
|---|---|
| WA-FR-26 | 5/9 Secondary reference Meritor Heavy Vehicle Systems, Llc |
NSN 5310-00-231-1952 is a Washer,flat, manufactured by Meritor Heavy Vehicle Systems, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-231-1952 has 5 manufacturer part numbers on file: WAFR26 (Meritor Industrial Products, Llc), WA-FR26-1 (Meritor Heavy Vehicle Systems, Llc), 131791 (Cnh Industrial America Llc Dba Cnh America), WAFR261 (Meritor Heavy Vehicle Systems, Llc), L31791 (Cnh Industrial America Llc Dba Cnh America).
3 possible matches (shared part number, not a government interchangeability claim): 5810-00-565-8211, 5365-01-151-8594, 5950-01-373-9838. Verify interchangeability with system specifications before substitution.
Key specifications for WA-FR26-1: Overall Diameter: 2.375 INCHES NOMINAL IN; Material Document and Classification: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND. 8 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.