The Washer,flat, cataloged under National Stock Number 5310-00-706-6437, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Garwood/feller Inc Garwood Winch Div. Government technical data includes 6 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-706-6437 |
| Primary Part Number | 12Y1027 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Garwood/feller Inc Garwood Winch Div |
| Status | ACTIVE |
| Overall Diameter | 2.125 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.562 INCHES NOMINAL IN |
| Thickness | 0.250 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 |
|---|---|
| 12Y1027 PRIMARY | Garwood/feller Inc Garwood Winch Div (USA) |
| 12Y1027 PRIMARY | Mack Trucks Inc Parts Opn (USA) |
| E2425 PRIMARY | Appleton Marine Inc (USA) |
| 42E12Y1027 PRIMARY | Fwd Seagrave Holdings Lp (USA) |
| 12Y1027 PRIMARY | Kenworth Truck Co a Div of Paccar Inc (USA) |
| Reference | Meaning |
|---|---|
| 12Y1027 | 5/9 Secondary reference Kaitlin Corp |
| 12Y1027 | 5/9 Secondary reference Walter Motor Truck Co |
| 12Y1027 | 5/9 Secondary reference Paccar Government Group Co Yarrow Bay Office Pk |
| BB21735 | 5/9 Secondary reference Diamond Reo Truck Co |
NSN 5310-00-706-6437 is a Washer,flat, manufactured by Garwood/feller Inc Garwood Winch Div, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-706-6437 has 5 manufacturer part numbers on file: 12Y1027 (Garwood/feller Inc Garwood Winch Div), 12Y1027 (Mack Trucks Inc Parts Opn), E2425 (Appleton Marine Inc), 42E12Y1027 (Fwd Seagrave Holdings Lp), 12Y1027 (Kenworth Truck Co a Div of Paccar Inc).
1 possible match (shared part number, not a government interchangeability claim): 5950-01-088-1111. Verify interchangeability with system specifications before substitution.
Key specifications for 12Y1027: Overall Diameter: 2.125 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Center Hole Shape Style: ROUND. 6 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.