The Washer,flat, cataloged under National Stock Number 5310-01-236-3279, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Hamilton Sundstrand Corporation Dba Collins Aerospace. Government technical data includes 9 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 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 | 5310-01-236-3279 |
| Primary Part Number | 91500 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| Overall Diameter | 1.165 INCHES NOMINAL IN |
| Hardness Rating | 75.0 ROCKWELL B MINIMUM OR 100.0 ROCKWELL B MAXIMUM |
| Material Document and Classification | AISI302 ASSN STD 1ST MATERIAL RESPONSE OR AISI303 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.755 INCHES NOMINAL IN |
| Thickness | 0.038 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 |
|---|---|
| 91500 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
NSN 5310-01-236-3279 is a Washer,flat, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-236-3279 has 1 manufacturer part number on file: 91500 (Hamilton Sundstrand Corporation Dba Collins Aerospace).
3 possible matches (shared part number, not a government interchangeability claim): 4330-01-523-7566, 6620-01-564-9870, 5305-01-652-2723. Verify interchangeability with system specifications before substitution.
Key specifications for 91500: Overall Diameter: 1.165 INCHES NOMINAL IN; Hardness Rating: 75.0 ROCKWELL B MINIMUM OR 100.0 ROCKWELL B MAXIMUM; Material Document and Classification: AISI302 ASSN STD 1ST MATERIAL RESPONSE OR AISI303 ASSN STD 2ND MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 9 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.