The Spacer,sleeve, cataloged under National Stock Number 5365-00-377-4645, is classified within Federal Supply Class 5365 (Bushings, Rings, Shims, and Spacers) of the Hardware and Abrasives group. The manufacturer of record is A.w. Mack Manufacturing Co., Inc.. Government technical data includes 7 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5365-00-377-4645 |
| Primary Part Number | 4018374 |
| Item Name | Spacer,sleeve |
| FSC / FSG | 5365 / 53 — Bushings, Rings, Shims, and Spacers |
| Manufacturer | A.w. Mack Manufacturing Co., Inc. |
| Status | ACTIVE |
| Corner Shape | SQUARE ALL CORNERS |
| Body Outside Diameter | 0.3530 INCHES MINIMUM AND 0.3570 INCHES MAXIMUM IN |
| Hardness Rating | 35.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | SOLID, PLAIN, NO OUTSIDE FLANGES |
| Material Document and Classification | AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.2510 INCHES MINIMUM AND 0.2520 INCHES MAXIMUM IN |
| Material | STEEL COMP 630 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 |
|---|---|
| 4018374 PRIMARY | A.w. Mack Manufacturing Co., Inc. (USA) |
| 4018374 | Barnes Group Inc. Div Windsor Division (USA) |
| Reference | Meaning |
|---|---|
| 5365PL0674644 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 4018374 | 5/9 Secondary reference Newell Window Furnishings Co |
| 4018374 | 5/9 Secondary reference Jdmc Enterprises Dba High Speed Machine Products |
| 4018374 | 5/9 Secondary reference Cooper Industries Inc Cooper Petroleum Equipment Div Sunnyvale Operation |
| 4018374 | 3/2 Design control — primary reference U.S. Government activity |
| 4018374 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| 4018374 | 5/9 Secondary reference Comet Mfg Co Inc |
| 4018374 | 5/9 Secondary reference Cecilware Corporation |
NSN 5365-00-377-4645 is a Spacer,sleeve, manufactured by A.w. Mack Manufacturing Co., Inc., classified under FSC 5365, Bushings, Rings, Shims, and Spacers. Status: active.
NSN 5365-00-377-4645 has 2 manufacturer part numbers on file: 4018374 (A.w. Mack Manufacturing Co., Inc.), 4018374 (Barnes Group Inc. Div Windsor Division).
Key specifications for 4018374: Corner Shape: SQUARE ALL CORNERS; Body Outside Diameter: 0.3530 INCHES MINIMUM AND 0.3570 INCHES MAXIMUM IN; Hardness Rating: 35.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL; Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES. 7 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.