The Screw Assembly,buffer, cataloged under National Stock Number 2990-00-918-4208, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Rolls-Royce Solutions America Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-00-918-4208 |
| Primary Part Number | 5172383 |
| Item Name | Screw Assembly,buffer |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Rolls-Royce Solutions America Inc |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL,COPPER COATED FINISH,4.280 IN LONG,0.320 IN ID,ONE SLOTTED 1/16 BY 5/64 IN DEEP AND THD 3/8-24 UNF 1-1/8 IN LG,OTHER END 5/8 IN BORE DEPTH W/ 5/32 IN ID HELICAL COMPRESSION SPRING 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 |
|---|---|
| 5172383 PRIMARY | Rolls-Royce Solutions America Inc (USA) |
| Reference | Meaning |
|---|---|
| 2990009184208 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| K-5172383 | 5/9 Secondary reference Korody-Colyer Corp a Cr Industries Co |
NSN 2990-00-918-4208 is a Screw Assembly,buffer, manufactured by Rolls-Royce Solutions America Inc, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-918-4208 has 1 manufacturer part number on file: 5172383 (Rolls-Royce Solutions America Inc).
Key specifications for 5172383: General Characteristics Item Description: STEEL,COPPER COATED FINISH,4.280 IN LONG,0.320 IN ID,ONE SLOTTED 1/16 BY 5/64 IN DEEP AND THD 3/8-24 UNF 1-1/8 IN LG,OTHER END 5/8 IN BORE DEPTH W/ 5/32 IN ID HELICAL COMPRESSION SPRING IN. 1 specification is 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.