The Washer,special,split, cataloged under National Stock Number 5310-01-210-3561, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-210-3561 |
| Item Name | Washer,special,split |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| General Characteristics Item Description | DIA. 0.560 IN.; CENTER BORE IS 0.235 IN. WITH 0.012 X 0.015 IN. 45 DEG.CH.; MATERIAL IS 4340 ALLOY STEEL PER MIL-S-5000 COND. C; COAT WITH ELECTROLESS NICKEL 0.001 IN. THK.; HEAT TREAT TO OBTAIN A HARDNESS OF BRINELL 336-390; ALL DIMENSIONS ARE AFTER PLATING; DRAWING NAME SPLIT RING IN |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | C |
| Reference | Meaning |
|---|---|
| 10922 | 3/9 Design control — primary reference Biach Industries, Inc. |
NSN 5310-01-210-3561 is a Washer,special,split, classified under FSC 5310, Nuts and Washers. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 5120-01-397-2964, 6240-01-425-7824, 6525-01-572-3533. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-01-210-3561: General Characteristics Item Description: DIA. 0.560 IN.; CENTER BORE IS 0.235 IN. WITH 0.012 X 0.015 IN. 45 DEG.CH.; MATERIAL IS 4340 ALLOY STEEL PER MIL-S-5000 COND. C; COAT WITH ELECTROLESS NICKEL 0.001 IN. THK.; HEAT TREAT TO OBTAIN A HARDNESS OF BRINELL 336-390; ALL DIMENSIONS ARE AFTER PLATING; DRAWING NAME SPLIT RING IN; Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS. 3 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.