The Standoff,threaded,spacing, cataloged under National Stock Number 5340-01-444-4257, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Accurate Screw Machine Corp Div Accurate Screw Machine Corporation. Government technical data includes 15 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5340-01-444-4257 |
| Primary Part Number | 21010-R-SS-.115-12 |
| Item Name | Standoff,threaded,spacing |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Accurate Screw Machine Corp Div Accurate Screw Machine Corporation |
| Status | ACTIVE |
| Length | 0.105 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-F-14072 E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.105 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN |
| Style Designator | PROJECTION ONE END LEFT INTERNAL THREAD |
| Material Document and Classification | ASTM A581 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Diameter | 0.156 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD) |
| Nominal Thread Size | 0.086 INCHES LEFT INTERNAL (INCLUDES THRU THREAD) IN |
| Cross-Sectional Shape | ROUND |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 303 OVERALL |
| Right Projection Diameter | 0.122 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) LEFT INTERNAL (INCLUDES THRU THREAD) |
| Right Projection Length | 0.115 INCHES NOMINAL IN |
| Hole Diameter | 0.098 INCHES MINIMUM AND 0.101 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 21010-R-SS-.115-12 PRIMARY | Accurate Screw Machine Corp Div Accurate Screw Machine Corporation (USA) |
| Reference | Meaning |
|---|---|
| 841975-1 | 5/9 Secondary reference Litton Systems Inc. Div Navigation Systems Division |
| 841975-1 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp |
NSN 5340-01-444-4257 is a Standoff,threaded,spacing, manufactured by Accurate Screw Machine Corp Div Accurate Screw Machine Corporation, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-444-4257 has 1 manufacturer part number on file: 21010-R-SS-.115-12 (Accurate Screw Machine Corp Div Accurate Screw Machine Corporation).
Key specifications for 21010-R-SS-.115-12: Length: 0.105 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-F-14072 E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.105 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN; Style Designator: PROJECTION ONE END LEFT INTERNAL THREAD. 15 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.