The Spacer,splined, cataloged under National Stock Number 2540-01-179-1086, is classified within Federal Supply Class 2540 (Vehicular Furniture and Accessories) of the Vehicular Equipment Components group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 2540-01-179-1086 |
| Primary Part Number | 12324353 |
| Item Name | Spacer,splined |
| FSC / FSG | 2540 / 25 — Vehicular Furniture and Accessories |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| General Characteristics Item Description | MATLSTEEL ALLOY,COMPOSITION 4140,4340,OR 8640 ASTM A322 OR A331 OPT.; EXTERNAL INVOLUTE SPLINE SPLINE DATA CLASS 2 FIT - FLAT ROOT SIDE FIT,NO. OF TEETH 57; DIA. PITCH 10/20; CIR- ULAR TOOTH THKNESS AT PITCH DIA. MAX. EFF 0.1553;MIN ACTUAL 0.1513;INTERNAL INVOLUTE SERRATION DATA FILLET ROOT SIDEFIT;NO. OF TEETH 69;DIAMETRAL PITCH 16/32; PRESSURE ANGLE 45 DEGREES;CIRCULAR SPACE WIDTH PITCH DIA. MAX ACT 0.1144;MIN EFF 0.1108 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 12324353 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 2540011791086 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 2540PL2196429 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 2540-01-179-1086 is a Spacer,splined, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 2540, Vehicular Furniture and Accessories. Status: active.
NSN 2540-01-179-1086 has 1 manufacturer part number on file: 12324353 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12324353: General Characteristics Item Description: MATLSTEEL ALLOY,COMPOSITION 4140,4340,OR 8640 ASTM A322 OR A331 OPT.; EXTERNAL INVOLUTE SPLINE SPLINE DATA CLASS 2 FIT - FLAT ROOT SIDE FIT,NO. OF TEETH 57; DIA. PITCH 10/20; CIR- ULAR TOOTH THKNESS AT PITCH DIA. MAX. EFF 0.1553;MIN ACTUAL 0.1513;INTERNAL INVOLUTE SERRATION DATA FILLET ROOT SIDEFIT;NO. OF TEETH 69;DIAMETRAL PITCH 16/32; PRESSURE ANGLE 45 DEGREES;CIRCULAR SPACE WIDTH PITCH DIA. MAX ACT 0.1144;MIN EFF 0.1108; End Item Identification: UKM TANK,COMBAT,FT,120 MM GUN (M1A1) MM. 1 specification is documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.