The Standoff,threaded,spacing, cataloged under National Stock Number 5340-01-253-6778, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Penn Engineering & Manufacturing Corp. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-253-6778 |
| Primary Part Number | KFB3-440-20ET |
| Item Name | Standoff,threaded,spacing |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Penn Engineering & Manufacturing Corp |
| Status | ACTIVE |
| Length | 0.620 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-T-10727, TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.375 INCHES MINIMUM LEFT INTERNAL (INCLUDES THRU THREAD) IN |
| Diameter | 0.215 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN |
| Cross-Sectional Shape | ROUND |
| Surface Treatment | TIN OVERALL |
| Material | COPPER ALLOY OVERALL |
| 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 |
|---|---|
| KFB3-440-20ET PRIMARY | Penn Engineering & Manufacturing Corp (USA) |
| 18099B-0440-14 | Carey Manufacturing Co, Inc Dba Amatom Electronic Hardware Div Amatom Electronic Hardware (USA) |
| Reference | Meaning |
|---|---|
| 18099B-0440-14 | 5/9 Secondary reference New Haven Mfg Corp Amatom Electronic Hardware Div |
NSN 5340-01-253-6778 is a Standoff,threaded,spacing, manufactured by Penn Engineering & Manufacturing Corp, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-253-6778 has 2 manufacturer part numbers on file: KFB3-440-20ET (Penn Engineering & Manufacturing Corp), 18099B-0440-14 (Carey Manufacturing Co, Inc Dba Amatom Electronic Hardware Div Amatom Electronic Hardware).
Key specifications for KFB3-440-20ET: Length: 0.620 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-T-10727, TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.375 INCHES MINIMUM LEFT INTERNAL (INCLUDES THRU THREAD) IN; Diameter: 0.215 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN. 7 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.