The Standoff,threaded,spacing, cataloged under National Stock Number 5340-00-298-1108, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Brinkley Technology Group Llc Dba Hercules Manufacturing. Government technical data includes 18 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5340-00-298-1108 |
| Primary Part Number | 4577 |
| Item Name | Standoff,threaded,spacing |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Brinkley Technology Group Llc Dba Hercules Manufacturing |
| Status | ACTIVE |
| Flange Width Across Flats | 0.750 INCHES NOMINAL IN |
| Length | 2.500 INCHES NOMINAL IN |
| Flange Thickness | 1.125 INCHES NOMINAL IN |
| Thread Length | 0.750 INCHES NOMINAL RIGHT EXTERNAL IN |
| Thread Length | 0.812 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN |
| Style Designator | FLANGED WITH LEFT INTERNAL THREAD |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE STANDOFF |
| Thread Direction | RIGHT-HAND RIGHT EXTERNAL |
| Thread Direction | RIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD) |
| Nominal Thread Size | 0.500 INCHES LEFT INTERNAL (INCLUDES THRU THREAD) IN |
| Nominal Thread Size | 0.500 INCHES RIGHT EXTERNAL IN |
| Thread Class | 3A RIGHT EXTERNAL A |
| Thread Class | 3B LEFT INTERNAL (INCLUDES THRU THREAD) |
| Thread Quantity Per Inch | 13 LEFT INTERNAL (INCLUDES THRU THREAD) |
| Thread Quantity Per Inch | 13 RIGHT EXTERNAL |
| Material | STEEL COMP 1212 STANDOFF |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) LEFT INTERNAL (INCLUDES THRU THREAD) |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) RIGHT EXTERNAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4577 PRIMARY | Brinkley Technology Group Llc Dba Hercules Manufacturing (USA) |
| Reference | Meaning |
|---|---|
| 4577 | 5/9 Secondary reference Hercules Engine Co Inc |
NSN 5340-00-298-1108 is a Standoff,threaded,spacing, manufactured by Brinkley Technology Group Llc Dba Hercules Manufacturing, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-298-1108 has 1 manufacturer part number on file: 4577 (Brinkley Technology Group Llc Dba Hercules Manufacturing).
3 possible matches (shared part number, not a government interchangeability claim): 5330-00-310-8790, 6145-00-472-9413, 2540-01-393-2805. Verify interchangeability with system specifications before substitution.
Key specifications for 4577: Flange Width Across Flats: 0.750 INCHES NOMINAL IN; Length: 2.500 INCHES NOMINAL IN; Flange Thickness: 1.125 INCHES NOMINAL IN; Thread Length: 0.750 INCHES NOMINAL RIGHT EXTERNAL IN. 18 specifications are 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.