The Nut,union, cataloged under National Stock Number 1090-00-517-1491, is classified within Federal Supply Class 1090 (No Item Name Available) of the Weapons group. The primary manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1090-00-517-1491 |
| Primary Part Number | 5171491 |
| Item Name | Nut,union |
| FSC / FSG | 1090 / 10 — No Item Name Available |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Thread Quantity Per Inch | 24 |
| Shoulder Step Width | 0.057 INCHES NOMINAL IN |
| Nominal Thread Size | 1.188 INCHES IN |
| Shoulder Seat Diameter | 1.187 INCHES NOMINAL IN |
| Smallest Inside Diameter | 1.005 INCHES NOMINAL IN |
| Thread Series | UNS |
| Nut Style | ROUND |
| Shoulder Width | 0.0312 INCHES NOMINAL IN |
| Nut Height | 0.307 INCHES NOMINAL IN |
| Nut Diameter | 1.330 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Thread Class | 2B |
| Supplementary Features | USED ON GUNS ONLY |
| Material | STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL |
| Surface Treatment | PHOSPHATE OVERALL |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 5171491 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 4730005171491 | E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 717124430208 | Ncb Hungary (honvedsegi Egyseges Termekkod) (HUN) |
| A10734 | Fnh Uk Ltd (GBR) |
| A20434 | Fnh Uk Ltd (GBR) |
| 4730PL0912291 | Jednolity Indeks Materialowy - Uniform Material Index (POL) |
NSN 1090-00-517-1491 is a Nut,union, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 1090 (No Item Name Available). Status: active.
NSN 1090-00-517-1491 has 6 cross-referenced part numbers: 5171491 (U S Army Tank Automotive Command Amsta-Im-Mm), 4730005171491 (E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales), 717124430208 (Ncb Hungary (honvedsegi Egyseges Termekkod)), A10734 (Fnh Uk Ltd), A20434 (Fnh Uk Ltd) and 1 more.
There are 2 known substitutes for 1090-00-517-1491: 5961-01-102-5719, 5310-01-670-6264. Verify interchangeability with system specifications before substitution.
Key specifications for 5171491: End Item Identification: PZA MACHINE GUN, GRENADE, 40MM MOD III(HILD), MK19 MM; Thread Quantity Per Inch: 24; Shoulder Step Width: 0.057 INCHES NOMINAL IN; Nominal Thread Size: 1.188 INCHES IN. 17 total characteristics are documented in the Federal Logistics Information System.