The Standoff,threaded,spacing, cataloged under National Stock Number 5340-01-420-3013, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Carey Manufacturing Co, Inc Dba Amatom Electronic Hardware Div Amatom Electronic Hardware. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5340-01-420-3013 |
| Primary Part Number | 8764-A-1/4-28-1B |
| Item Name | Standoff,threaded,spacing |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Carey Manufacturing Co, Inc Dba Amatom Electronic Hardware Div Amatom Electronic Hardware |
| Status | ACTIVE |
| Width Across Flats | 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN |
| Length | 1.495 INCHES MINIMUM AND 1.505 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-A-8625 TY 2 CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.500 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN |
| Thread Length | 0.500 INCHES NOMINAL RIGHT INTERNAL IN |
| Style Designator | LEFT INTERNAL AND RIGHT INTERNAL THREADS |
| Material Document and Classification | QQ-A-225/5 T4 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-225/3 T3 FED SPEC 2ND MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD) |
| Thread Direction | RIGHT-HAND RIGHT INTERNAL |
| Nominal Thread Size | 0.250 INCHES RIGHT INTERNAL IN |
| Nominal Thread Size | 0.250 INCHES LEFT INTERNAL (INCLUDES THRU THREAD) IN |
| Cross-Sectional Shape | HEXAGON |
| Surface Treatment | ANODIZE OVERALL |
| Thread Class | 2B LEFT INTERNAL (INCLUDES THRU THREAD) |
| Thread Class | 2B RIGHT INTERNAL |
| Thread Quantity Per Inch | 28 LEFT INTERNAL (INCLUDES THRU THREAD) |
| Thread Quantity Per Inch | 28 RIGHT INTERNAL |
| Material | ALUMINUM ALLOY 2017 OR ALUMINUM ALLOY 2011 OVERALL |
| Thread Series Designator | UNF LEFT INTERNAL (INCLUDES THRU THREAD) |
| Thread Series Designator | UNF RIGHT INTERNAL |
| 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 |
|---|---|
| 8764-A-1/4-28-1B PRIMARY | Carey Manufacturing Co, Inc Dba Amatom Electronic Hardware Div Amatom Electronic Hardware (USA) |
| 1581-H-A-1.500-3 | Accurate Screw Machine Corp Div Accurate Screw Machine Corporation (USA) |
| 210-1004P56 | Howard Clock Products Inc (USA) |
| AL6955-428-1 1/2-12 PRIMARY | Lyn-Tron, Inc. Dba Lyn-Tron Inc (USA) |
| Reference | Meaning |
|---|---|
| 210-1004P56 | 5/9 Secondary reference Raytheon Company Div Corp |
| 8764-A-1/4-28-1B | 5/9 Secondary reference New Haven Mfg Corp Amatom Electronic Hardware Div |
| 210-1004P56 | 7/2 Vendor item drawing reference Raytheon Company Dba Raytheon Co |
NSN 5340-01-420-3013 is a Standoff,threaded,spacing, manufactured by Carey Manufacturing Co, Inc Dba Amatom Electronic Hardware Div Amatom Electronic Hardware, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-420-3013 has 4 manufacturer part numbers on file: 8764-A-1/4-28-1B (Carey Manufacturing Co, Inc Dba Amatom Electronic Hardware Div Amatom Electronic Hardware), 1581-H-A-1.500-3 (Accurate Screw Machine Corp Div Accurate Screw Machine Corporation), 210-1004P56 (Howard Clock Products Inc), AL6955-428-1 1/2-12 (Lyn-Tron, Inc. Dba Lyn-Tron Inc).
Key specifications for 8764-A-1/4-28-1B: Width Across Flats: 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN; Length: 1.495 INCHES MINIMUM AND 1.505 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-A-8625 TY 2 CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.500 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN. 20 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.