The Pin,protuding Tension Head, cataloged under National Stock Number 5315-00-232-4375, is classified within Federal Supply Class 5315 (Nails, Machine Keys, and Pins) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 5315-00-232-4375 |
| Primary Part Number | HL552-12-31 |
| Item Name | Pin,protuding Tension Head |
| FSC / FSG | 5315 / 53 — Nails, Machine Keys, and Pins |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL,MIL-S-5000,MIL-S-5626 OR MIL-S-6049 |
| 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 |
|---|---|
| HL552-12-31 | Grimes Aerospace Company (USA) |
| HL552-12-31 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HL552-12-31 | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| HL552-12-31 PRIMARY | Hi-Shear Corporation (USA) |
| HL552-12-31 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HL552-12-31 | West Coast Aerospace, Inc. (USA) |
| Reference | Meaning |
|---|---|
| HL552-12-31 | 5/9 Secondary reference U.S. Government activity |
| HL552-12-31 | 5/2 Secondary reference U.S. Government activity |
NSN 5315-00-232-4375 is a Pin,protuding Tension Head, manufactured by Hi-Shear Corporation, classified under FSC 5315, Nails, Machine Keys, and Pins. Status: active.
NSN 5315-00-232-4375 has 6 manufacturer part numbers on file: HL552-12-31 (Grimes Aerospace Company), HL552-12-31 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), HL552-12-31 (Fairchild Fasteners Europe - Vsd Gmbh), HL552-12-31 (Hi-Shear Corporation), HL552-12-31 (Sps Technologies, Llc Dba PB Fasteners) and 1 more.
Key specifications for HL552-12-31: General Characteristics Item Description: STEEL,MIL-S-5000,MIL-S-5626 OR MIL-S-6049. 1 specification is 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.