The Nut,plain,extended Washer,hexago, cataloged under National Stock Number 5310-01-220-6136, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Diamond Power International, Inc.. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-220-6136 |
| Primary Part Number | FM-5981 |
| Item Name | Nut,plain,extended Washer,hexago |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Diamond Power International, Inc. |
| Status | ACTIVE |
| Material Document and Classification | 43B11CL-C,FSCM 17590 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Size | 0.500 INCHES IN |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| FM-5981 PRIMARY | Diamond Power International, Inc. (USA) |
| N3-9876 PIECE 492 | Diamond Power International, Inc. (USA) |
| Reference | Meaning |
|---|---|
| FM5981 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5310-01-220-6136 is a Nut,plain,extended Washer,hexago, manufactured by Diamond Power International, Inc., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-220-6136 has 2 manufacturer part numbers on file: FM-5981 (Diamond Power International, Inc.), N3-9876 PIECE 492 (Diamond Power International, Inc.).
Key specifications for FM-5981: Material Document and Classification: 43B11CL-C,FSCM 17590 MFR REF SINGLE MATERIAL RESPONSE OVERALL; Nominal Thread Size: 0.500 INCHES IN; Material: STEEL OVERALL. 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.