The Pin,straight,headless, cataloged under National Stock Number 5315-01-684-1570, is classified within Federal Supply Class 5315 (Nails, Machine Keys, and Pins) of the Hardware and Abrasives group. The manufacturer of record is Thorlabs, Inc. Government technical data includes 7 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5315-01-684-1570 |
| Primary Part Number | ER4 |
| Item Name | Pin,straight,headless |
| FSC / FSG | 5315 / 53 — Nails, Machine Keys, and Pins |
| Manufacturer | Thorlabs, Inc |
| Status | ACTIVE |
| Hole Arrangement Style | BOTH END DRILLED |
| First End Style | SQUARE INTERNALLY THREADED |
| Material Document and Classification | MANUFACTURE REFERENCE MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Pin Overall Diameter | 0.236 INCHES NOMINAL IN |
| Pin Overall Length | 4.0 INCHES NOMINAL IN |
| Second End Style | SQUARE INTERNALLY THREADED |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| ER4 PRIMARY | Thorlabs, Inc (USA) |
NSN 5315-01-684-1570 is a Pin,straight,headless, manufactured by Thorlabs, Inc, classified under FSC 5315, Nails, Machine Keys, and Pins. Status: active.
NSN 5315-01-684-1570 has 1 manufacturer part number on file: ER4 (Thorlabs, Inc).
1 possible match (shared part number, not a government interchangeability claim): 7025-01-718-2917. Verify interchangeability with system specifications before substitution.
Key specifications for ER4: Hole Arrangement Style: BOTH END DRILLED; First End Style: SQUARE INTERNALLY THREADED; Material Document and Classification: MANUFACTURE REFERENCE MFR REF SINGLE MATERIAL RESPONSE OVERALL; Pin Overall Diameter: 0.236 INCHES NOMINAL IN. 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.